Spreadsheet: 0db55a44-60c5-4f74-b0b8-380a2fed4a4e
Sheet: Sheet1

Key | depending on | Short Title | Priority | Institute1 | Institute2 | Institute3 | Institute4 | Coordinator | Status | Full Description | Comment | Unnamed: 12
Accelerator |  | Accelerator
CR | Accelerator | Cryogenic | moderate
SC | Accelerator | SC Cavity
SC_Shapes | SC | SC Cavity Shapes |  |  |  |  |  |  |  | Explore new cavity shapes such as LL and RE to decrease Hpk/Eacc.
SC_Shapes_LL | SC_Shapes | Low-loss cavity shape
SC_Shapes_LL_wake | SC_Shapes_LL | LL wake field analysis | high | FNAL | SLAC |  |  |  | in progress | Carry out complete wake field analysis computationally and check with measurements
SC_Shapes_LL_gradient | SC_Shapes_LL | LL gradient | high | KEK | TJNAF |  |  |  | in progress | Achieve gradient and Q expectations up to at least 35MV/m first in 9-cell cavity tests.
SC_Shapes_LL_module | SC_Shapes_LL | LL performance in modules | moderate | KEK |  |  |  |  | in progress | Achieve gradient and Q expectations up to at least 35MV/m in modules with beam. Check Wake fields and HOM damping in modules with beam.
SC_Shapes_RE | SC_Shapes | Re-entrant cavity shape
SC_Shapes_RE_wake | SC_Shapes_RE | RE wake field analysis | high | FNAL | SLAC | DESY | KEK |  | in progress | Carry out complete wake field analysis computationally and check with measurements
SC_Shapes_RE_gradient | SC_Shapes_RE | RE gradient | high | Cornell |  |  |  |  | in progress | Achieve gradient and Q expectations up to at least 35MV/m first in 9-cell cavity tests.
SC_Shapes_RE_module | SC_Shapes_RE | RE performance in modules | moderate |  |  |  |  |  | undefined | Achieve gradient and Q expectations up to at least 35MV/m in modules with beam. Check Wake fields and HOM damping in modules with beam.
SC_Shapes_Susu | SC_Shapes | Superstructure with superconducting joint | moderate | TJNAF |  |  |  |  | in progress | Explore the 'superstructure' concept to improve the packing fraction and reduces the number of couplers.Develop a superconducting joint to join superstructure cavity pairs after processing.to avoid handling with > 2m structures. | Most work was done at DESY and is now stopped.  2x7 Superstructures tested in a CM with beam.
SC_Materials | SC | SC Materials
SC_Materials_Fine_Grain | SC_Materials | Standard fine-grain material
SC_Materials_Fine_Grain_Industry_Process | SC_Materials_Fine_Grain | Nb industrial process optimization | high | DESY |  |  |  |  | in progress | Understand and optimize the industrial production process, e.g. number of melts to reach the specified RRR/impurity content for cost savings,
SC_Materials_Fine_Grain_Mech_Properties | SC_Materials_Fine_Grain | Fine-grain mechanical properties | high | DESY |  |  |  |  | in progress | Explore the mechanical properties of fine grain rolled sheet material
SC_Materials_Fine_Grain_Sheet_QC | SC_Materials_Fine_Grain | Nb sheet QC | high | DESY |  |  |  |  | in progress | Explore better sheet quality control measures than present eddy current scanning to allow detection of <100 um size defects on starting Nb | EU CARE
SC_Materials_Fine_Grain_Postpurification | SC_Materials_Fine_Grain | Need for post-purification with electropolished multi-cell cavities. | high | DESY |  |  |  |  | in progress | Establish or eliminate the need for post purification which increases RRR and gives higher performance in the presence of defects, but lowers yield strength. | XFEL related study, tests on 9-cell cavities.
SC_Materials_Fine_Grain_Tantalum_Spec | SC_Materials_Fine_Grain | Relax Tantalum impurity specification. | moderate | TJNAF |  |  |  |  | in progress | Explore whether Ta impurity spec can be relaxed to lower material costs.
SC_Materials_Large_Grain | SC_Materials | Large or single-grain material
SC_Materials_Large_Grain_Slicing | SC_Materials_Large_Grain | Large or single-grain slicing techniques. | high | Cornell | DESY | FNAL | TJNAF |  | in progress | Explore cost savings in Nb material from the large or single-crystal sliced directly from the ingot. Develop fast, inexpensive sheet slicing techniques.
SC_Materials_Large_Grain_Properties | SC_Materials_Large_Grain | Large or single-grain material properties. | moderate | Cornell | DESY | FNAL | TJNAF |  | in progress | Improve understanding of mechanical, etching and oxidation properties with crystal orientation. Important topics are: acceptable yield strength of material cut directly from ingot, uniformity during forming of half cells, slippage of grains during forming, vacuum leaks through grain boundaries, grain boundary problems during EBW.
SC_Materials_Large_Grain_Multicells | SC_Materials_Large_Grain | Large or single-grain multi-cell tests | high | DESY | TJNAF |  |  |  | in progress | Fabricate and test complete 9-cell cavities with end groups using large grain or single grain material.
SC_Materials_Large_Grain_Module | SC_Materials_Large_Grain | Large or single-grain multi-cell tests in modules | moderate |  |  |  |  |  | undefined | Prepare and test modules with cavities.
SC_Materials_NbCu | SC_Materials | NbCu laminated material |  |  |  |  |  |  |  | Explore  Nb/Cu laminate approaches. (Nb layer ~ 0.5 mm thick) combined with the increased thermal conductivity and stiffness of the copper backing. | Research is relevant, but will not be ready in time for the TDR
SC_Materials_NbCu_Bonding | SC_Materials_NbCu | NbCu bonding method | moderate | DESY | KEK |  |  |  | in progress | Choose bonding method: explosion bonding, hot rolling HIP, back extrusion. | EU CARE
SC_Materials_NbCu_Rigidity | SC_Materials_NbCu | NbCu cavity rigidity | moderate | DESY | KEK |  |  |  | in progress | Develop detail method to make cavity rigid against Lorentz force.  Determine how to handle end-groups. | EU CARE
SC_Materials_NbCu_Multicells | SC_Materials_NbCu | NbCu multi-cells | moderate |  |  |  |  |  | undefined | Fabricate and test complete 9-cell cavities with end groups.  Prepare and test modules with cavities.
SC_Basic_Studies | SC | Sc Basic Studies
SC_Basic_Studies_SCRF_theory | SC_Basic_Studies | RF critical field theory | moderate |  |  |  |  |  | undefined | Theoretical studies on the RF critical magnetic field
SC_Basic_Studies_SCRF_experimental | SC_Basic_Studies | RF critical field experiments | moderate |  |  |  |  |  | undefined | Measurements of the RF critical field
SC_Basic_Studies_FE_surfaces | SC_Basic_Studies | Prepare FE-free surfaces | high |  |  |  |  |  | undefined | Explore new methods to prepare field emission free surfaces
SC_Basic_Studies_FE_Processing | SC_Basic_Studies | FE processing studies | high |  |  |  |  |  | undefined | Studies to reduce field emission including emitter processing, and RF processing of cavities.
SC_Basic_Studies_Q_slope | SC_Basic_Studies | High field Q-slope | high |  |  |  |  |  | undefined | Theoretical and experimental studies on the high field Q-slope and its reduction by baking.
SC_Basic_Studies_Medium_Slope | SC_Basic_Studies | Medium field Q-slope | moderate |  |  |  |  |  | undefined | Theoretical and experimental studies on the medium field Q-slope.
SC_Basic_Studies_Surface | SC_Basic_Studies | Surface studies | moderate |  |  |  |  |  | undefined | Surface analytical studies of niobium using state-of-the-art instrumentation such as XPS, Auger, SIMS, 3DAP and others.
SC_Basic_Studies_Impurities | SC_Basic_Studies | Role of impurities for SRF performance | moderate |  |  |  |  |  | undefined | Studies to delineate the role of impurities (e.g. O, N, C, H, Ta…) on the superconducting RF performance of Nb
SC_Basic_Studies_Mechanical_Imperfections | SC_Basic_Studies | Mechanical imperfections and SRF performance | high |  |  |  |  |  | undefined | Impact of grain boundaries and other mechanical imperfections on the superconducting properties of niobium with the focus on mass production to define EBW quality, defects, roughness, etc.
SC_Basic_Studies_Large_Grain | SC_Basic_Studies | Basic studies on large or single-grain material | moderate | TJNAF |  |  |  |  | in progress | Basic studies (similar to those describe above) on large grain and single grain niobium.
SC_Fabrication | SC | Fabrication
SC_Fabrication_Vessel | SC_Fabrication | Helium vessel strength | high | KEK |  |  |  |  | in progress | Design modification to the helium vessel end walls for more strength | World Collaboration?
SC_Fabrication_Short_Cavity | SC_Fabrication | Short beam tubes | high | FNAL |  |  |  |  | in progress | Shorten  beam tube lengths to their acceptable minimum to improve the packing fraction in cryomodule | World Collaboration?
SC_Fabrication_Industrialisation | SC_Fabrication | Review overall mechanical design, reduce parts count | high | DESY |  |  |  |  | in progress | Review of the overall mechanical design, including flanges, sealing gaskets, number of nuts and bolts, and end group fabrication, with an eye towards reduced parts count and industrial production. | World Collaboration?
SC_Fabrication_Alternative_Fabrication | SC_Fabrication | Alternatives | moderate | DESY | INFN Legnaro |  |  |  | in progress | Explore Hydroforming and spinning seamless cavity cells, eliminating several machining, chemical cleaning, and EBW steps using Nb tubes as starting material. | EU CARE
SC_Fabrication_Alternative_SuperconductingJoint | SC_Fabrication_Alternative_Fabrication | Development of Superconducting Joint | moderate | TJNAF |  |  |  |  | in progress | Possibly applied in superstructure. Could be useful in joining endgroups to the cavity body.
SC_Fabrication_NbCu_Cladding | SC_Fabrication | NbCu Cladding | moderate | DESY | KEK |  |  |  | undefined | Explore use of  Nb copper-clad tubes as starting material.  Study delamination of clad Nb-Cu. | EU CARE
SC_Fabrication_NbCu_Thermocurrents | SC_Fabrication | NbCu Thermocurrents | moderate | DESY | KEK |  |  |  | undefined | Study thermocurrents flux trapping for composite material. | EU CARE
SC_Fabrication_NbCu_endgroups | SC_Fabrication | NbCu Endgroups | low |  |  |  |  |  | undefined | Explore copper end groups coated with Nb by sputtering or other method.  Determine acceptable method of joining end group to cells.
SC_Preparation | SC | Cavity surface preparation
SC_Preparation_Inspection | SC_Preparation | Integration of inspection (optical,mechanical) into cleanroom | very high | DESY |  |  |  |  | in progress | Improve quality control for key steps of mechanical checks, optical inspection. Explore integration of mechanical measurements (eccentricity, etc.), optical inspection (EB welds etc.), field profile and final frequency tuning into the cleanroom area.
SC_Preparation_Surface_treatment | SC_Preparation | Necessary surface treatment | high | Cornell | DESY | KEK | TJNAF |  | in progress | Improve understanding of necessary surface treatments, i.e. chemical polishing and electro-polishing on the cavity performance, surface roughness, oxide thickness and composition in sheet material. | EU CARE, more world wide?
SC_Preparation_Tumbling | SC_Preparation | Tumbling and EP | high | KEK |  |  |  |  | in progress | Evaluate the benefits of tumbling/barrel polishing to reduce amount of EP necessary
SC_Preparation_EP | SC_Preparation | Electropolishing parameters | very high | Cornell | DESY | KEK | TJNAF |  | in progress | Establish reliable procedures for electropolishing, studying relevant parameters, such as acid composition | EU CARE, more world wide?
SC_Preparation_HPR | SC_Preparation | High-pressure rinse parameters | very high | INFN Milano |  |  |  |  | in progress | Establish reliable procedures for high pressure rinsing, e.g., studying jet parameters. | World-wide?
SC_Preparation_Drying | SC_Preparation | Drying procedures | very high | DESY | Cornell | KEK | TJNAF |  | in progress | Evaluate and optimize drying procedures after HPR is to avoid re-contamination of the surface
SC_Preparation_Preparation_Industrialisation | SC_Preparation | Large-scale production surface preparation issues | high |  |  |  |  |  | undefined | Capture high performance processing protocols for large scale production | World-wide?
SC_Preparation_Baking | SC_Preparation | Baking as part of drying process | high | Saclay | DESY |  |  |  | in progress | Explore integration of the drying with the in-situ bake-out.
SC_Preparation_Outside_Etch | SC_Preparation | Necessity of out side etch | moderate | DESY |  |  |  |  | undefined | Explore the option of eliminating outside etching
SC_Preparation_Hot_Water | SC_Preparation | Hot water rinse after chemical treatment | high |  |  |  |  |  | undefined | Evaluate the benefits of Hot water rinsing | DESY experiments are on hold
SC_Preparation_Dry_Ice | SC_Preparation | Dry-ice cleaning | moderate | DESY |  |  |  |  | in progress | Evaluate Dry-ice cleaning instead of high pressure water rinsing as a possible tool for in-situ cleaning a cavity after assembly.
SC_Preparation_Air_Bake | SC_Preparation | Air instead of vacuum bake | high | Saclay | DESY |  |  |  | in progress | Evaluate Air bake out instead of in-situ vacuum bake at 120 - 130 C.
SC_Test | SC | SC Test
SC_Test_Acceptance_Reproducibility | SC_Test | Gradient reproducibility | very high | DESY | KEK | TJNAF |  |  | in progress | Get reproducible 35 MV/m gradient and Q 10^10 performance results from cavity to cavity, and from processing to processing.
SC_Test_Acceptance_Spread | SC_Test | Gradient performance spread | very high | DESY | KEK | TJNAF |  |  | in progress | Narrow the gradient spread so that operational implications are acceptable. Carry out with a large number of 9-cell cavities.
SC_Test_Cryomodule | SC_Test | Cavity Performance in Cryomodules
SC_Test_Cryomodule_35 | SC_Test_Cryomodule | 35 MV/m operation in Modules | high | DESY | KEK | FNAL |  |  | in progress | Establish 35MV/m cavity in modules with acceptable dark currents, minimal dark current propagation, acceptable heat loads, radiation levels, and long-term operation at 35 MV/m with acceptable trip rates, recovery times for target availability.
SC_Test_Cryomodule_35_beam | SC_Test_Cryomodule | 35 MV/m operation in Modules with ILC-like beam | high | DESY | FNAL |  |  |  | undefined | Demonstrate 1.3 GHz cavity operation at 35 MV/m with ILC - like beam currents
SC_Test_RF_unit | SC_Test | Test of entire RF unit - system test | high | DESY | FNAL | KEK |  |  | undefined | Test cryomodules, complete RF system, controls and auxiliaries (pumps etc.) with aligned cavities and quad. | evaluate failures with long recovery time; e.g. tuner etc.
[NAME] | SC | [NAME]
SC_String_Assy_QC | [NAME] | QC for string assembly | very high | DESY | FNAL | KEK |  |  | in progress | Develop improved quality control procedures for cavity string assemblies
[NAME] | [NAME] | Optimize workflow for string assembly | high | DESY |  |  |  |  | in progress | Optimize overall workflow during inspection, preparation, assembly and testing optimization to avoid contamination and increase cost effectiveness. | XFEL related studies
SC_String_Assy_Parts_Procedures | [NAME] | Simplify procedures and reduce parts count for string assembly | high |  |  |  |  |  | undefined | Simplify procedures and reduce the amount of parts used during clean assembly.
SC_String_Assy_Auto | [NAME] | [NAME] assembly (semi-)automation | high |  |  |  |  |  | undefined | Develop improved tooling and (semi-) automation.
SC_String_Assy_Particle_Inside | [NAME] | Inside cavity particle counting for QC | moderate |  |  |  |  |  | undefined | For the quality control of assembly procedures develop a technology to assess particle contaminations of the inner cavity surface.
SC_String_Assy_Cleaning_Parts | [NAME] | Mass production methods for cleaning screws etc. | high |  |  |  |  |  | undefined | Develop mass production  methods to clean large number of parts (e.g. cleaning of screws, gaskets etc.)
SC_Coupler | SC | SC Coupler
SC_Coupler_Processing | SC_Coupler | Improve processing | high | DESY | Orsay |  |  |  | in progress | Carry out studies to reduce conditioning time studies, for e.g by better geometry for pumping, coatings. | XFEL related studies
SC_Coupler_Large_Cold | SC_Coupler | Larger diameter cold assy for TTF-type | moderate | Orsay |  |  |  |  | in progress | Increase the diameter of the cold assembly (from 40 mm to 62 mm to push multipactor levels to higher powers and therefore provide coupler for higher gradient choice ( ~ 45 MV/m).
SC_Coupler_Alternatives | SC_Coupler | Alternative couplers | moderate |  |  |  |  |  | in progress | Explore Different coupler designs incorporating two " disk " type windows as alternatives to the TTF cylindrical window.
SC_Coupler_Capacitive | SC_Coupler | "Capacitive" disk window coupler | moderate | KEK |  |  |  |  | in progress | The "capacitive" disk window coupler.
SC_Coupler_Tristan | SC_Coupler | TRISTAN' like window coupler | moderate | KEK |  |  |  |  | in progress | The 'TRISTAN' like window coupler.
SC_Coupler_TW60 | SC_Coupler | TW60 coupler | moderate | Orsay |  |  |  |  | in progress | The TW60 coupler.
SC_Coupler_AMAC | SC_Coupler | AMAC window coupler. | moderate |  |  |  |  |  | undefined | The AMAC window coupler. | AMAC company
SC_HOM | SC | HOM
SC_HOM_Confirm_Mirrored | SC_HOM | [NAME] design | very high | DESY | Saclay |  |  |  | in progress | Confirm damping of HOMs in mirrored configuration; eventually with beam | XFEL related studies
SC_HOM_2K_Cryoload | SC_HOM | HOM induced cryoload at 2K | high | DESY |  |  |  |  | undefined | Measure cryogenic power deposited by beam induced HOMs at 2K to be sure that this is less than 20% (?) or as required to keep the overall cryo load under control
SC_HOM_Improve_Existing | SC_HOM | Improve existing design | high | DESY | KEK | TJNAF |  |  | in progress | Slight modifications to the HOM coupler, and pickup design for ease of fabrication, fundamental power rejection, and thermal stability.
SC_HOM_Absorber_Material | SC_HOM | HOM absorber material | high | DESY | Cornell |  |  |  | in progress | Work on reproducible properties of beam line absorber material.
SC_HOM_Feedthroughs | SC_HOM | Higher heat conductivity feedthroughs | moderate | TJNAF | DESY |  |  |  | in progress | Explore  higher heat conductivity feedthroughs for the output lines
SC_HOM_Alternate | SC_HOM | Alternate HOM couplers | moderate | TJNAF | KEK |  |  |  | undefined | Explore alternate HOM couplers
SC_HOM_Output_Parallel | SC_HOM | HOM output in F-piece plane | moderate | TJNAF | KEK |  |  |  | undefined | Radial positioning of the HOM coupler output in the plane of so called F-part.
SC_HOM_Hidden_Capacity | SC_HOM | HOM: Hidden capacitor | moderate | TJNAF | KEK |  |  |  | undefined | Version of HOM coupler with hidden output capacitor.
SC_HOM_No_Capacity | SC_HOM | HOM: No capacitor | moderate | TJNAF | KEK |  |  |  | undefined | Version of HOM coupler without output capacitor.
SC_Tuner | SC | [NAME]
SC_Tuner_Fast_Range | SC_Tuner | Increase fast tuning range | very high | Saclay | KEK | INFN Milano | Cornell |  | in progress | Design with increased fast tuning range | EU CARE
SC_Tuner_Fast_Actuator | SC_Tuner | Fast actuator R&D | very high | Orsay |  |  |  |  | in progress | Fast actuator R&D | EU CARE
SC_Tuner_35 | SC_Tuner | Prototype tests at 35 MV/m | high |  |  |  |  |  |  | Prototype tests with [NAME] compensation at 35 MV/m
SC_Tuner_MTBF | SC_Tuner | MTBF for cold motor | high |  |  |  |  |  | undefined | Verification of sufficient MTBF for cold motor
SC_Tuner_TJNAF | SC_Tuner | Renascence tuner | moderate | TJNAF |  |  |  |  | undefined | [NAME] tuner: Design for ILC cryostat
SC_Tuner_KEK | SC_Tuner | KEK screwball tuner | high | KEK |  |  |  |  | in progress | KEK coaxial ball screw tuner: Choice of coating material for balls, Weight reduction
SC_Tuner_Redundancy | SC_Tuner | [NAME] redundancy | high |  |  |  |  |  | undefined | Develop Redundant motor and piezo, if inside of vacuum vessel
SC_Tuner_Warm_Motor | SC_Tuner | Warm tuner motor | low |  |  |  |  |  | undefined | Explore Warm motor | High cost e.g. static cryo-load
SC_Tuner_Magnetostrictive | SC_Tuner | Magnetostrictive tuner | moderate |  |  |  |  |  | in progress | Explore larger stroke Magnetrostrictive actuator with detailed characterization | FNAL, University of Lodz (Poland)
SC_Tuner_Reliability | SC_Tuner | [NAME] reliability | high |  |  |  |  |  | undefined | [NAME] (MTBF) studies of motor / gearing / piezo / magnetostrictive actuator, including failure mechanisms and improved estimate of requirements.
CM | Accelerator | [NAME]
CM_4th_gen | CM | Development of a 4th generation cryomodule | high | FNAL | KEK | INFN Milano | DESY |  | in progress | Type IV cryomodule will include the following features from Type III+ :  Same vacuum vessel diameter and cavity centerline location Same support posts Same cavity support detail (with roller bearings and invar rods) Same input coupler (Type III/XFEL) at least in terms of mounting and interface to vacuum vessel, cavity, and thermal shields
CM_4th_gen_cav_dist | CM_4th_gen | Cavity distance | high | FNAL | KEK | CERN | INFN Milano |  | in progress | Adapt modul design for shorter cavity distance
CM_4th_gen_magnet | CM_4th_gen | Quad layout, seperate steerers |  |  |  |  |  |  |  | Quad layout
CM_4th_gen_quad_center_pos | CM_4th_gen_magnet | Design the support details for locating quad/corrector/BPM package under center post, but still hung from 300 mm tube | high | FNAL | INFN Milano | KEK |  |  | in progress | Move quadrupole position to center post of module
CM_4th_gen_quad_strength | CM_4th_gen_magnet | Quad strength | moderate |  |  |  |  |  | in progress | Quad strength e.g. variation with linac energy
CM_4th_gen_current_leads | CM_4th_gen_magnet | Current feeds for quad at center position | high | CERN | FNAL | KEK |  |  | in progress | Current feeds for quad at center position
CM_4th_gen_coupler | CM_4th_gen | Design module end to accommodate the input coupler at the far end of the cryostat | high | FNAL | INFN Milano |  |  |  | in progress | All modules through type III+ included a quadrupole on the input coupler end of the last module.  Without the quad, the last input coupler interferes with the vacuum flange.  Some extra module length may be necessary.
CM_4th_gen_interconnect | CM_4th_gen | Module-to-module interconnect design | high | CERN | FNAL | INFN Milano |  |  | undefined | The interconnect must include the 2-phase pipe to 300 mm pipe cross-connect and an HOM absorber on the beam pipe.  We want minimum length in order to maximize linac packing factor
CM_4th_gen_slot | CM_4th_gen | Module slot lengths | high | FNAL | INFN Milano |  |  |  | undefined | Need to define a set of module slot lengths (with and without quad as a minimum) for the GDE RDR effort.  This is a "bottom line" based on preliminary estimates for many of the above numbers
CM_4th_gen_BPM | CM_4th_gen | BPM resolution | very high | Saclay | SLAC |  |  |  | in progress | BPM resolution
CM_4th_gen_piping | CM_4th_gen | Review of cooling pipe sizes | high | DESY | FNAL | CERN |  |  | in progress | Thermal shield pipe sizes increase to accommodate high flows and long spacing.  Evaluate in conjunction with the development of a cryogenic system layout | XFEL related studies
CM_4th_gen_transport | CM_4th_gen | Design for transport | very high | DESY | FNAL |  |  |  | in progress | Design for stability with shipping, analysis of shipping restraints and loads | XFEL related studies
CM_4th_gen_vibration | CM_4th_gen | Vibrational analysis of the quad and cavity support structure | high | INFN Milano | FNAL | DESY |  |  | in progress | Analyses should be compared to measurements for verification of the model for future design work | XFEL related studies
CM_4th_gen_manufacturibility | CM_4th_gen | Design for manufacturability | high | DESY | FNAL |  |  |  | in progress | Design for manufacturability | XFEL related studies
CM_4th_gen_tuner_choice | CM_4th_gen | Choice of tuner | moderate | FNAL | KEK | INFN Milano |  |  | undefined | Choice of tuner | Depends partially on cavity interconnect distanc
CM_4th_gen_mag_shield | CM_4th_gen | Magnetic shielding | moderate | FNAL | DESY | KEK | INFN Milano |  | undefined | Review present practices, make changes to incorporate blade tuner design.  Explore alternate concepts such as internal helium vessel shield proposed by KEK
CM_4th_gen_test_plan | CM_4th_gen | Develop module test plans and module component test plans | high | DESY |  |  |  |  | in progress | Consider not only what must be done on a module test stand, but also what earlier tests of the module and module components should be done for QA, QC, and understanding module performance. | XFEL related studies
CM_4th_gen_instrumentation | CM_4th_gen | Design of instrumentation for installation into the module | high | DESY |  |  |  |  | in progress | Wire position monitor details or another system to verify cavity positional stability with thermal cycles, thermometry, etc | XFEL related studies
CM_alternate | CM | Cryo Module Alternatives
CM_alternate_module_movers | CM_alternate | Movers on the module | moderate |  |  |  |  |  | undefined | ACD:Investigate feasibility of movers on the module | cost? Technical feasibility
CM_alternate_seperate_quad | CM_alternate | Separate cryosection for quads | low | FNAL |  |  |  |  | undefined | ACD: Quote from CM4 meeting CERN: 'An alternative, not part of the baseline type IV configuration, but it offers some advantages for standardizing modules and flexibility with respect to quad package variations and quad alignment. Longer term.' | Has cost implication
CM_alternate_quad_movers | CM_alternate | Movers on the quad | moderate |  |  |  |  |  | undefined | ACD:Investigate need for movers on the quad | cost? Technical feasibility
CM_alternate_spool_for_shorter_segementation | CM_alternate | Design of a segmentation "spool" piece | low | FNAL | SLAC |  |  |  | undefined | ACD: Segmentation of the cryomodule strings, or some other means by which to enable warming up of relatively short sections of the linac
IN | Accelerator | Injection/Extraction
IN_e- | IN | Electrons
IN_e-Laser | IN_e- | polarized source laser | high | SLAC |  |  |  |  | in progress | Laser with proper wavelength and pulse structure (needed for TDR) (mentioned in the BCD)
IN_e-HVPolGun | IN_e- | Higher voltage polarized gun | high | SLAC |  |  |  |  | in progress | Develop higher voltage DC gun.  (better, but not essential) (mentioned in the BCD) | ACD
IN_e-PolCathode | IN_e- | polarized cathode improvements | high | SLAC |  |  |  |  | in progress | Polarized cathode development (better, but not essential) ( mentioned in the BCD)
IN_e-Buncher | IN_e- | buncher design | high |  |  |  |  |  | undefined | Design the buncher and pre-accelerator system (I think this is engineering, not R&D).
IN_e-PolRFGun | IN_e- | polarized RF gun | moderate |  |  |  |  |  | undefined | Develop polarized RF gun (better, but not essential) (mentioned in the BCD) | ACD
IN_e+ | IN | Positrons
IN_e+Target | IN_e+ | target and AMD | very high | ANL | EuroTeV | LLNL |  |  | in progress | Prototype and test a target system and AMD.  This is high priority because it is a complex mechanical/vacuum system stressed to near its limits and with large radiation and heat deposition | ANL is designing AMD.  LLNL is designing target and has plans to build both. EuroTeV is working on specification and engineering of the photon target and collimator
IN_e+UdulatorProto | IN_e+ | Prototype the undulator | high | EuroTeV |  |  |  |  | in progress | Prototype the undulator
IN_e+Capture | IN_e+ | e+ capture section | high | DESY | SLAC |  |  |  | in progress | Design, prototype and test the warm accelerating capture section
IN_e+SourceSim | IN_e+ | e+ source simulation | high | ANL | EuroTeV |  |  |  | in progress | End to end simulation of e+ source
IN_e+SpinFlipper | IN_e+ | e+ spin flipper | high | EuroTeV |  |  |  |  | in progress | Feasibility study of a spin-flip transport system, including estimation of systematic errors
IN_e+PreAcc | IN_e+ | e+ preaccelerator | moderate |  |  |  |  |  |  | Design, prototype and test the warm pre-accelerator section | SLAC is making plans to do this.
LP | Accelerator | Linac Performance
LP_simulation | LP | Linac Performance Simulation
LP_sim_emittance_preservation | LP_simulation | linac emittance preservation | high | EuroTeV |  |  |  |  |  | Develop and verify at least 2 algorithms (3 preferred) which can achieve the required emittance-preservation performance of the main linac. (from PT) | Develop and optimise beam-based alignment algorithms and feedback systems to optimise the luminosity performance in the bunch compressor, main linac and beam delivery systems. (EuroTev)
LP_sim_RTML_BDS | LP_simulation | RTML, BDS emittance preservation | high | EuroTeV |  |  |  |  |  | Study emittance preservation / tuning problem for RTML and BDS (ie, do stuff similar to what was done for the main linac). (from PT) | Develop and optimise beam-based alignment algorithms and feedback systems to optimise the luminosity performance in the bunch compressor, main linac and beam delivery systems. (EuroTev)
LP_sim_errors | LP_simulation | full simulation with static and dynamic errors | high |  |  |  |  |  |  | Extend to full-system simulations (ie, RTML->IP, with both static and dynamic errors and corrections). (from PT) | Not sure if above EuroTeV project handles this.
LP_sim_spin-propagation | LP_simulation | spin propagation | high | EuroTeV |  |  |  |  |  | Inclusion of spin in the simulation code GUINEA-PIG, and benchmarking of physics processes.
LP_sim_bkgrd_collimation | LP_simulation | background and collimators | high | EuroTeV |  |  |  |  |  | Evaluate (model) the performance of various post-LINAC collimation systems for given halo models, and evaluate the impact on the detector. Investigate the impact of luminosity tuning and errors on background performance.
[NAME] | LP_simulation | FMEA | high | EuroTeV |  |  |  |  |  | Identification of key failure modes, and evaluation of their impact on the machine design.
LP_sim_stabilisation | LP_simulation | mechanical stabilisation technology | moderate | EuroTeV |  |  |  |  |  | Evaluation of mechanical stabilisation technologies for use in critical areas of the ILC; specifically commercially available inertial devices, and laser-based feedback systems.  Low priority because not needed many places if any.
LP_controls | LP | fix tight phase stability requirement | high |  |  |  |  |  |  | The phase stability specifications for the RTML RF systems (on the order of 0.05 degrees of 1.3 GHz) are extremely tight, and to my knowledge nobody has demonstrated that capability yet.  There is a similar issue, obviously, for crab cavities and for [NAME] relative arrival time at the IP.  Figure out how to achieve this, or how to reduce the requirement (from PT)
LP_magnets | LP | Linac Magnets
LP_magnets_quad_center | LP_magnets | quad magnetic center change with excitation | high | SLAC |  |  |  |  |  | Variation in center position of SC quads as a function of current variation (needed to understand BBA). (from PT) | SLAC.  [NAME] has plans to do this in JFY06
LP_magnets_quad_vibration | LP_magnets | SC quad vibration | high | BNL | DESY | INFN Milano |  |  |  | Measurement and reduction of vibration of the magnetic center of SC quads in cryomodules.  This has been a high-priority topic for LET since the days of the TRC report, and either nothing has been done on it or else the measurements reveal such large vibrations that nobody wants to admit to having done them. (from PT) | Measure the vibrations of a RHIC SC quad (BNL)
LP_magnets_ground_motion | LP_magnets | measure ground motion | moderate | EuroTeV |  |  |  |  |  | Measurement, cataloguing and characterisation of ground motion spectra at various test facilities and potential collider sites around the world; implementation of a public central database server for storing the results.).  Low priority because there is already a lot of data on this and it will soon be the job of each site to do this for their site. | EuroTev
LP_magnets_DR_kicker | LP_magnets | DR kicker stability | low |  |  |  |  |  |  | If the RTML is to be built without a turnaround and feed-forward, the required damping ring kicker stability must be demonstrated.  (for ACD) (from BCD).  Low priority because we plan to have a turn-around.
LP_instrumentation | LP | Linac Instrumentation
LP_instrumentation_linac_BPM_prototype | LP_instrumentation | linac BPM prototype | high | SLAC | KEK | Saclay |  |  |  | Design of a BPM which meets specifications required for emittance preservation (once those are known). (from PT) | Build and test [NAME] inside an SC quad.  (SLAC).  [NAME] KEK will build prototype BPM for STF in JFY06
LP_instrumentation_auto_laser_alignment | LP_instrumentation | automated laser alignment | high | EuroTeV |  |  |  |  |  | Develop and prototype a laser-based system capable of rapidly and accurately surveying the required 10-20 km of accelerator ([NAME]).
HA | Accelerator | High Availability
HA_magnet | HA | HA magnet | very high |  |  |  |  |  |  | Design and test water cooled magnets with an MTBF/MTTR improvement of a factor of 20 above the present typical number of 1,000,000/8.  To properly test these it would be best to find an accelerator that needs new magnets and build it with the better design.  Note that leaky water fittings, poor cable connections, and faulty thermal interlocks count as magnet failures.  High priority because these are a big contributor to the downtime and testing will require several years.
HA_magnet_PS | HA | HA magnet power supply | very high |  |  |  |  |  |  | Design and test a magnet power supply system with an MTBF/MTTR improvement of a factor of 10 above the present typical number of 100,000/2.  To properly test these it would be best to find an accelerator that needs new power supplies and build it with the better design.  Note that transductors, cables, and magnet interlock electronics (temperature, ground fault interlock) are considered to be part of the power supply system. | SLAC has an interest in this, but not presently working on it.
HA_controls | HA | HA controls | high | SLAC | ANL | DESY |  |  |  | Design and test a controls backbone and field bus to be much more reliable than present systems.
HA_flow_switch | HA | HA flow switch | high |  |  |  |  |  |  | Design and test a better flow switch with an MTBF/MTTR a factor of 10 better than the present typical number of  250,000/1.  An alternative to this would be to figure out how to have many-fewer flow switches while still protecting all the water cooled devices.  Note that trips due to bubbles, set point drifts, and interlock electronics failures count as flow switch failures.
HA_kicker_pulser | HA | HA kicker pulser | high |  |  |  |  |  |  | Design and test a kicker pulser with an MTBF/MTTR a factor of 5 better than the typical present number of 100,000/2.  There are already projects designing fast DR kicker pulsers, perhaps this could be an extension of those programs.
HA_vacuum_devs | HA | HA vacuum mechanical devices | high |  |  |  |  |  |  | Design and test vacuum mechanical devices such as collimators and beam stoppers and vacuum valves with and MTBF/MTTR a factor of 5 better than 100,000/8.  Low priority because may only need a FMEA analysis and not a prototype
CT | Accelerator | Controls
CT_LLRF | CT | Controls Low Level RF
CT_LLRF_sys | CT_LLRF | CT LLRF system | very high | DESY | FNAL |  |  |  |  | Develop the LLRF system, including all features needed for SCRF management and stabilization.
CT_LLRF_cav_sim | CT_LLRF | CT LLRF RF unit simulator | high | [NAME] | DESY |  |  |  |  | Develop a real-time simulator for use with real-time llrf  controllers for algorithm development and evaluation. Includes beam loading effects,  RF algorithm development, and the effect of different bunch patterns,  bunch currents, etc.
CT_LLRF_RFunit_sim | CT_LLRF | CT LLRF Runit simulator | high | [NAME] | DESY |  |  |  |  | Extend an existing single-cavity simulation of ILC linac  cavities to multiple cavities to study collective effects and  sensitivities. This goes beyond the functionality of the DESY simcon module.
CT_LLRF_IF | CT_LLRF | CT LLRF IF | high | FNAL |  |  |  |  |  | study [NAME] IF/mixer frequencies vs ADC performance and  sampling rate.
CT_LLRF_IQ | CT_LLRF | CT LLRF IQ | high | FNAL |  |  |  |  |  | evaluate and demonstrate optimal methods for implementing  low-noise digital I/Q detection.
CT_LLRF_front_end | CT_LLRF | CT LLRF front end | high | DESY | LBL | FNAL |  |  |  | Investigate robustness and rad-hard potential of high  speed/high performance ADCs for in-tunnel use for LLRF front-ends. | XFEL
CT_LLRF_SEU | CT_LLRF | CT LLRF single event upset | high | DESY |  |  |  |  |  | Develop and test techniques for detecting and managing  single-event upsets in FPGAs. | XFEL
CT_Timing | CT | Timing
CT_Timing_long_phase_dist | CT_Timing | CT Timing long baseline phase dist | very high | ANL | DESY |  |  |  |  | Evaluate and prototype active phase  stabilization design options, including thermal, fiber stretcher,  phase averaging, and wavelength tunable fibers. implement a prototype phase stabilized fiber  optic reference link, 20km long for operating at 1550nm with 1.3GHz  modulation.
CT_Timing_sector_phase | CT_Timing | CT Timing sector phase dist | high | ANL |  |  |  |  |  | Implement a prototype local phase  distribution system (250m scale).
CT_Timing_phase_mod | CT_Timing | CT Timing phase dist modulation | moderate |  |  |  |  |  |  | Evaluate whether to chop or not chop outgoing  reference signals for eliminating crosstalk on phase stabilization  system.
CT_Timing_beam_phase | CT_Timing | CT Timing beam phase reference | high |  |  |  |  |  |  | Evaluate beam derived reference for locking  phase reference to beam. Pursue HOM phase detector scheme.
CT_Timing_phase_receiver | CT_Timing | CT Timing phase receiver | moderate |  |  |  |  |  |  | Prototype a two-channel phase reference receiver  comparator.
CT_Controls | CT | Controls
CT_Controls_HA_platform | CT_Controls | CT Controls HA platform | very high | SLAC | ANL |  |  |  |  | Evaluate the ATCA hardware platform for suitability  for accelerator controls applications.
CT_Controls_HA_Inst | CT_Controls | CT Controls HA Instrumentation | very high | SLAC |  |  |  |  |  | Port a high sensitivity instrumentation application  (eg bpm electronics) to the ATCA hardware platform to evaluate the  suitability of ATCA for use in accelerator instrumentation applications.
CT_Controls_MPS FMEA | CT_Controls | CT Controls MPS failure modes | high |  |  |  |  |  |  | Perform failure modes and effects analysis for the accelerator  for integration into the MPS functional and logic design. [Note this  refers only to control system aspects of the MPS, and does not capture  the machine-related MPS R&D]
CT_Controls_RT | CT_Controls | CT Controls real time | moderate |  |  |  |  |  |  | Research real-time controls communication protocols with respect to different levels of determinism.
CT_Controls_network | CT_Controls | CT Controls network backbone | moderate |  |  |  |  |  |  | Measure the current state-of-the-art and  technology advances necessary to met ILC control system backbone  communication networks.
CT_Controls_network_model | CT_Controls | CT Controls network model | moderate |  |  |  |  |  |  | Implement a network model for the ILC control system  to study network architectures and topologies. Study the effect on  network performance of many (1000's) small network attached device
CT_Controls_software_platforms | CT_Controls | CT Controls software platforms | moderate |  |  |  |  |  |  | Examine control system software options with respect  to ILC requirements. Evaluate options such as EPICS, OMG DDS (NDDS),  ICE, ALMA ACS, GIS, etc). The goal is to converge on a final  architecture over the next 2-3 years.
CT_Controls_database_model | CT_Controls | CT Controls database model | moderate |  |  |  |  |  |  | Develop a model of all accelerator components using  a relational database. This includes logical relationships between  components as well as physical relationships (cabling). The component  relationship model of the accelerator is critical for diagnosis and  early detection of failures, as well as managing the specialized  sub-system knowledge that develops at an accelerator.
CT_Controls_design_data_management | CT_Controls | CT Controls design data management | moderate |  |  |  |  |  |  | Investigate and/or prototype the use of GIS (Geographic  Information Systems) for unifying data management across  organizational boundaries. Overall goal is to unify and manage the  thousands of revision control drawings
CT_Controls_security | CT_Controls | CT Controls security | moderate |  |  |  |  |  |  | Develop control system security framework. Determine  policies for authentication, authorization, and encryption at all  levels of the control system.
CT_Controls_operational_data_management | CT_Controls | CT Controls operational data management | moderate |  |  |  |  |  |  | Develop operational data management methodologies. Examine workflow and the combined used of relational databases,  direct-to-disk archived data, general data files such as CDF, HDF,  SDDS, and specific physics data file formats.
CT_Controls_software_middleware | CT_Controls | CT Controls software middleware | moderate |  |  |  |  |  |  | Develop Service Oriented Architecture (SOA) for the  control system middleware tier. Define the required components and  messaging that will be required to fulfill controls application  requirements such as save/restore, command executives (sequencers),  alarms, etc. Architecture should allow for high degree of automation.
CT_Controls_failure_mode_analysis | CT_Controls | CT Controls failure mode analysis | moderate |  |  |  |  |  |  | Perform a failure modes and effects analysis of the  integrated control system to identify vulnerabilities and recovery  strategies.
CT_Controls_GAN | CT_Controls | CT Controls GAN | high |  |  |  |  |  |  | Evaluate implications of a Global Accelerator Network.
CT_Controls_front_end_network_dev | CT_Controls | CT Controls front end network dev | high |  |  |  |  |  |  | Evaluate options and demonstrate a uniform diagnostics/interlock  hardware layer and communications protocol.
CT_Controls_early_fault_signalling | CT_Controls | CT Controls early fault signalling | moderate | SLAC |  |  |  |  |  | Develop a model of the integrated control system to  study implementation of early detection and diagnosis of system  malfunction or anomalous behavior. Research is required to determine  the best way to capture and model this component, connection and  functional information.
CT_HA | CT | CT HA
CT_HA_platform_development | CT_HA | CT HA platform development | very high | ANL | SLAC |  |  |  |  | Develop custom hardware for the ATCA platform,  implementing shelf-management and IPMC.
CT_HA_evaluation | CT_HA | CT HA evaluation | very high |  |  |  |  |  |  | Develop an understanding of high availability  techniques and methodology as they would apply to the ILC control  system. Assess the impact and benefits of implementing high  availability in the three tiers of the ILC accelerator control system
CT_HA_redundant_operations | CT_HA | CT HA redundant operations | high |  |  |  |  |  |  | Evaluate and demonstrate redundancy, fail-over,  and self-healing capabilities in real-time operating system running on  an ATCA front-end controller. This could be evaluated by porting EPICS  to ATCA.
CT_HA_architecture | CT_HA | CT HA architecture | moderate |  |  |  |  |  |  | Examine choices to providing high availability  databases, file servers, and controls middleware. Develop framework  for high availability software development in the control system  middle tier
CT_Feedback | CT | Feedback
CT_Feedback_beamline_integration | CT_Feedback | CT Feedback beamline integration | very high |  |  |  |  |  |  | Study beam feedback performance and robustness  tradeoffs with number, location, noise floor, and resolution of  beam-based feedback sensors and actuators (eg bpms & correctors). This  work should be done in conjunction with the accelerator groups, and  the results could impact the lattice design and instrumentation  performance requirements.
CT_Feedback_intratrain_ | CT_Feedback | CT Feedback intratrain | very high | PPARC |  |  |  |  |  | Continue to prototype and demonstrate intra-train(3 MHz) trajectory feedback system hardware for deployment at the Interaction Point and possibly elsewhere (beam delivery system, RTML turnaround feed-forward). This is currently the FONT development.
CT_Feedback_system_model | CT_Feedback | CT Feedback system model | very high | PPARC | SLAC |  |  |  |  | Develop realism of model of the ILC intra-train feedback systems. Continue to evaluate overall performance, including feedback algorithm optimisation, settling time, and effect on ILC luminosity. develop integrated model of beam transport including 5Hz and intra-train trajectory feedback systems. In conjunction with accelerator group.
CT_Feedback_high_speed_hardware | CT_Feedback | CT Feedback high speed hardware | high | PPARC |  |  |  |  |  | Develop hardware for fast (bunch-by-bunch) luminosity measurement, and design system for incorporation of luminosity information into intra-train beam scanning system to augment trajectory feedback.
CT_Feedback_optimization | CT_Feedback | CT Feedback optimization | high |  |  |  |  |  |  | Develop and optimize beam-based feedback algorithms  and systems for accelerator performance and luminosity optimization.
CT_Feedback_slow_system_model | CT_Feedback | CT Feedback slow system model | high |  |  |  |  |  |  | Develop an integrated model of the ILC 5Hz beam-based  feedback systems, including control of the trajectory, energy, energy  spread, etc
CT_Feedback_exception_handling | CT_Feedback | CT Feedback exception handling | high |  |  |  |  |  |  | Develop and test real-time online techniques for  feedback system self-diagnosis, including identifying malfunctioning  or flaky bpms and correctors. Develop techniques for minimally  invasive techniques for reconfiguring algorithms on the fly. This may  impact the corrector and bpm design.
CT_Feedback_kicker | CT_Feedback | Feedforward system for ‘kicker’ stabilization. | very high | KEK |  |  |  |  |  | Related kicker monitoring and compensation schemes
IS | Accelerator | Instrumentation
IS_BPM | IS | BPM
IS_BPM_CAV | IS_BPM | Cavity BPMs - calibration and systematics | very high | SLAC |  |  |  |  |  | Excellent resolution has been demonstrated but calibration, offset stability, gain, multi-bunch and coupling (x/y) performance have not been demonstrated. In real systems, high resolution will allow real-time calibration using dithering and sub-tolerance beam jitter.
IS_BPM_CAV | IS_BPM | Cavity BPMs. [NAME] | high | SLAC |  |  |  |  |  | Special locations in the beam delivery require exceptional performance. Full-scale tests of these devices must be done.
IS_BPM_CAV_clean | IS_BPM | Cavity BPMs. [NAME] compatible | high | SLAC | Saclay |  |  |  |  | Cavity BPMs must be clean-able so that their proximity to high gradient SCRF cavities does not pose a threat. There is basic knowledge of how this should be done, it must be proven in order to detail the cryomodule design.
IS_BPM_DR | IS_BPM | Damping ring BPMs. | high | SLAC |  |  |  |  |  | The damping ring BPM performance is somewhat beyond the present state of the art since thermal transients will be present and more precise tuning is required. Fast readout and effective beam based alignment must be studied.
IS_BPM_HOM | IS_BPM | SCRF HOM BPMs. | high | SLAC | DESY |  |  |  |  | [NAME] will be needed: 1) in case of problems with the nominal cavity BPMs, 2) to understand cryomodule assembly and 3) to study long range wakes. Excellent resolution (3 um) has been demonstrated and RD is needed to test calibration and alignment accuracy.
IS_BP | IS | Phase Monitor
IS_BP_HOM | IS_BP | SCRF HOM beam phase monitor | high | SLAC | DESY |  |  |  |  | LLRF must have a beam-time based reference. This could be done using the HOM signals, without the installation of an additional pickup inside the cavity. Initial tests at TTF show it is straightforward.
IS_BP_BDS | IS_BP | Beam phase monitor. | high |  |  |  |  |  |  | A redundant system for monitoring relative beam timing at the IP is needed. This is believed to be straightforward but will be hard to test because of the extreme precision required - 0.1 ps.
iS_PM | IS | Profile Monitors
IS_PM_LW | IS_PM | Laserwire. | very high | PPARC |  |  |  |  |  | Laserwires must be integrated into the RTML, Linac and beam delivery lattices. The full range of their performance requirements should be understood, with special attention to x y coupling. Once this is done, it will become apparent that 1) UV light, 2) high power lasers and 3) dipole - mode scanning are all required. These should work, but have never been demonstrated.
IS_PM_LW_Ops | IS_PM | Laserwire operations. | high | PPARC |  |  |  |  |  | High speed operation and full integration of laserwire systems are necessary to minimize cost (single laser for many wires) and maximize data rate. High speed scan testing is underway in the lab and a multi-IP/single laser system has been installed at SNS.
IS_PM_LWRing | IS_PM | Ring laserwire. | moderate | KEK |  |  |  |  |  | Because of its absolute scale and excellent multi-bunch performance, the ring laserwire will be proposed for the damping rings. A fully successful version of this system exists at ATF; RD is needed to reduce cost.
IS_PM_XSR | IS_PM | Xray synchrotron radiation monitor for ring and transport lines | high | KEK | Cornell |  |  |  |  | An imaging beam size monitor for the damping ring system will provide information on coupling, damping and high speed phenomena. [NAME] monitors have been shown to work and can have micron resolution. RD is needed to develop high speed signal processing and high power handling.
IS_PM_Blen | IS_PM | Transvserse deflecting cavities 'LOLA'. | high | SLAC | DESY |  |  |  |  | There are three general applications of these devices in the ILC: 1) injectors (capture section energy and phase), 2) RTML (bunch compressor performance) and 3) beam delivery (crab, y z correlation and beam timing monitors). LOLA cavities should be able to select a single bunch from within the train without any impact on other bunches.  SCRF LOLA is required for the beam delivery where it may be important to correct as well as monitor. RD is needed to 1)develop the injector systems (typically x/y together), 2) develop integrated imaging systems and 3) reduce cost through the use of a single source for several cavities.
IS_PM_SBlen | IS_PM | Simple bunch length monitors. | moderate | SLAC |  |  |  |  |  | This is a ceramic gap and a diode or set of diodes, as used at SLC. These devices are very cheap, will be tested for LCLS and are excellent 'relative' monitors.
IS_DR | IS | Damping Ring Instrumentation
IS_DR_MPS | IS_DR | Damping ring Coherent signal receivers. | high |  |  |  |  |  |  | These will ultimately be used to determine the suitability of the beam for extraction. There should be no coherent motion detectable leading up to extraction. This is special because there are few rings in the world which routinely meet this criteria. There may be a need for more than one type of this sort of monitor. The bunch charge distribution oscillations associated with the microwave instability require a very high frequency receiver (in the case of the DR, in the 5 to 10 GHz range).
IS_DR_Damping | IS_DR | Damping monitors. | high |  |  |  |  |  |  | A very wide dynamic range monitor is required to watch the damping of the incoming beam. This can be some sort of synchrotron light ‘x-ray monitor’.
IS_DR_Inj | IS_DR | Injection match monitor. | moderate |  |  |  |  |  |  | The incoming phase space is poorly matched to the damping ring equilibrium phase space. Many rings have used real-time ‘energy / trajectory’ matching monitors.
IS_DR_Disp | IS_DR | Fast dispersion monitoring | moderate |  |  |  |  |  |  | Using a modern BPM system, it may be possible to measure the dispersion real time, using a very small RF frequency bump during the store. Dispersion correction will have to be done using a feedback process.
IS_DR_Life | IS_DR | Lifetime monitors | moderate |  |  |  |  |  |  | The MPS will probably require fast shutoff of the downstream beam. This can be done without aborting the damping ring beam, in principle. The injector can be used to keep the DR full (and, most importantly, warm) during downstream interruptions. If this is the case, there should be a ‘slow cycle’ where the upstream power is greatly reduced. This allows the positron ring to be kept full with a much lower duty cycle high power electron beam. I don’t really know if this is possible, but it seems reasonable to ask that the rings be kept full at all times. In this case, it is important to monitor the ring lifetime, even during nominal operation, so that the back up ‘long store’ cycles are ready when needed.
IS_DR_Coupling | IS_DR | Coupling monitors. | moderate |  |  |  |  |  |  | There may be an MPS need to quickly couple the beam in order to keep a nominal charge bunch going – with a large enough phase space volume so that the bunch is benign. A fast coupler is in itself a bit dangerous and would require monitoring.
IS_DR_BLM | IS_DR | Fast loss monitors | moderate |  |  |  |  |  |  | The rings will have beams with some destructive power. There must be an abort system and associated beam loss monitors. This is similar to other high power rings.
IS_DR_Tune | IS_DR | Tune monitors. | moderate |  |  |  |  |  |  | The required performance of this device depends on expected collective effect symptoms (space charge tune shift / coupling bumps) etc.
IS_DR_COLL | IS_DR | DR Collimation monitoring and protection. | high |  |  |  |  |  |  | It is likely that some sensitive components in the ring will need collimation in order to protect them from poor quality injection. When these devices limit the incoming power, there must be some diagnostic system to provide understanding of the root cause.
IS_SP | IS | Special Instrumentation
IS_SP_COLL | IS_SP | Beam halo monitor. | very high |  |  |  |  |  |  | Experience has shown that even careful beam halo estimates can be completely wrong. A beam halo monitor is needed. There are some ideas about how to do this (best developed for proton machines) but nothing has been demonstrated.
IS_SP_gamma | IS_SP | Undulator photon diagnostics | high |  |  |  |  |  |  | Total gamma ray intensity, gamma ray steering and gamma ray phase space. Depending on details of the spectrum and relationship between spectrum and phase space, most of these have been demonstrated. However, since an undulator system with these parameters has never been made, this is High Priority.
IS_SP_e+ | IS_SP | Real time e+ injection energy spread monitor. | high |  |  |  |  |  |  | This may be a single pass synchrotron light monitor. Such devices have been made, but have not worked well.
IS_SP_COLL | IS_SP | Collimation system monitors. | very high |  |  |  |  |  |  | Instrumentation is needed to understand what a given jaw is 'doing' and to know when a collimator has been damaged. This kind of thing has not been demostrated.
PS | Accelerator | Power Source
PS_Modulator | PS | Modulators
PS_Modulator_PT_Improvement | PS_Modulator | Improvement of pulse transformer modulator | very high | DESY | FNAL | KEK |  |  | in progress | Development program starting at Zeuthen for XFEL. KEK working with Mitsubishi for STF modulator. | BC; FNAL to test new version in 2006
PS_Modulator_IGBT | PS_Modulator | IGBT Switch design | very high | SLAC |  |  |  |  |  | New IGBT design
PS_Modulator_HVCM | PS_Modulator | HVCM type modulator used at SNS | high | SLAC |  |  |  |  |  | 10 MW test for SLAC L-Band facility
PS_Modulator_Direct_Series | PS_Modulator | Direct Series switch modulator | high | SLAC |  |  |  |  |  | Direct Series switch modulator to be developed with DTI using phase II SBIR funds. Tests at SLAC
PS_Modulator_Marx | PS_Modulator | [NAME] | very high | SLAC |  |  |  |  | in progress | SLAC building prototype; KEK also interested | Potentially much less expensive and less space consuming.
PS_Modulator_Intensive_Charge_Supply | PS_Modulator | Develop Intensive Charging Supply | high |  |  |  |  |  | undefined | This work is not well documented. KEK? Is this a Gap in the R&D programme?
PS_Modulator_HVCable | PS_Modulator | High voltage cable (120kV) | moderate |  |  |  |  |  |  | Would be needed if klystrons and modulators are far apart (>2.5 km)
PS_Klystron | PS | Klystron
PS_Klystron_MBK | PS_Klystron | MBK improvement | very high | DESY | KEK |  |  |  | in progress | Thales (DESY), CPI (DESY), Toshiba (KEK) | Thales tube reliability; 12 beam tube efficiency
PS_Klystron_Alternatives | PS_Klystron | * Alternative klystron designs; the priority of the most promising approach will be raised to "high" | high
PS_Klystron_MBK_many_beamlets | PS_Klystron_Alternatives | MBK with many beamlets,e.g. 36 | moderate | KEK |  |  |  |  | undefined | By increasing the beam current with the number of beamlets, the required high voltage can be reduced to several 10 kV. | Described in the BCD document but the number "12" in the BCD was wrong by mistake. This should be corrected.
PS_Klystron_Sheet_Beam | PS_Klystron_Alternatives | L-band prototype of Sheet beam klystron (see * above) | moderate | SLAC |  |  |  |  | undefined
PS_Klystron_PPM | PS_Klystron_Alternatives | Periodic Permanent Magnet (PPM) focusing version of 5 MW single beam tube (see * above) | moderate | SLAC |  |  |  |  | undefined | Efficiency
PS_Klystron_Inductive_op | PS_Klystron_Alternatives | Inductive Output tubes (see * above) | low |  |  |  |  |  |  | Proposed by CPI for better efficicency. Could be interesting if MBK program fails.
BD | Accelerator | Beam Delivery System
BD_Angle | BD | Crossing Angle Dependence
BD_20mrad | BD_Angle | large crossing angle specific (14 or 20mrad)
BD_20mrad_1 | BD_20mrad | prototype compact SC quads | high | BNL |  |  |  |  |  | Prototype compact SC quads (short BNL prototype tested, self shielded quad tested) | BC | Hardware
BD_20mrad_3 | BD_20mrad | integration of DID into solenoid | low | BNL | SLAC |  |  |  | completed | Study integration of DID into solenoid (preliminary consideration for SiD done [Smith_Wands_2005]) | BC | Design
BD_20mrad_4 | BD_20mrad | vertical orbit correction & polarimetry | low | SLAC |  |  |  |  | completed | Study vertical orbit correction & polarimetry (preliminary considerations done) | BC | Design
BD_20mrad_5 | BD_20mrad | TPC calibration procedure with DID | moderate | MPI |  |  |  |  |  | Study TPC calibrations procedures with DID | BC | Design
BD_20mrad_6 | BD_20mrad | stability of compact SC FD | high | BNL |  |  |  |  |  | Stability of compact SC FD (preparations at BNL) | BC | Hardware
BD_20mrad_7 | BD_20mrad | design crossing angle IR with all acc component | moderate | (GLD,SID,LDC) |  |  |  |  |  | Design crossing angle IR with all acc. (bpms, kickers, supports) and [NAME] (lumi, beamcal) components, vacuum chamber w. assembly considerations | BC | Design
BD_20mrad_8 | BD_20mrad | study of downstream diagnostics performance | moderate | UK | SLAC |  |  |  |  | Study performance of downstream diagnostics in presence of beamstrahlung cone | BC | Design/Hardware
BD_14mrad_2 | BD_20mrad | integration of final quads into common cryostat | low | BNL |  |  |  |  |  | Integration of final quads into common cryostat ([NAME] studies at start) | AC | Design
BD_2mrad | BD_Angle | 2mrad crossing angle specific
BD_2mrad_1 | BD_2mrad | Large aperture SC quads | high | KEK | Saclay | LARP |  |  |  | Large aperture SC quads (r=35mm), may use NbTi for long L*, likely need Nb3Sn for L*=3.5m and E upgrade (LARP and European programs for LHC ongoing, design must be accommodated to ILC requirements) | BC | Design/Hardware
BD_2mrad_2 | BD_2mrad | Large aperture SC sextupoles | high | KEK | LARP |  |  |  |  | Large aperture SC sextupoles (r=90[NAME]) | BC | Hardware
BD_2mrad_3 | BD_2mrad | design tungsten liner into QD0 | moderate | SLAC | UK | Orsay |  |  |  | Design tungsten liner into the QD0, to reduce energy density due to radiative [NAME] | BC | Design
BD_2mrad_4 | BD_2mrad | integration of quad&sextupoles into detector | high | (GLD,SID,LDC) |  |  |  |  |  | Study integration of large aperture quads and sextupoles within the detector | BC | Design
BD_2mrad_5 | BD_2mrad | Pocket coil warm quads QF1 | moderate | SLAC | FNAL |  |  |  |  | Pocket coil warm quads QF1 (first look done) | BC | Design
BD_2mrad_6 | BD_2mrad | synchrotron background | moderate | (GLD,SID,LDC) |  |  |  |  |  | Evaluate neutron and photon backscattering due to synchrotron radiation (produced upstream and by bending in FD) and charged halo particles impinging on apertures of FD and extraction line, in particular on the face of QF1 | BC | Design
BD_2mrad_7 | BD_2mrad | special extraction septum quads | moderate | SLAC | FNAL |  |  |  |  | Special extraction septum quads | BC | Design
BD_2mrad_10 | BD_2mrad | study consequence of 0.5mrad photon aperture | moderate | SLAC | UK | Orsay |  |  |  | Study consequence of 0.5mrad photon aperture (1.25mrad in 20mrad) | BC | Design
BD_2mrad_11 | BD_2mrad | protection collimators in FD | moderate | SLAC | UK | FNAL |  |  |  | Study possibilities to place protection collimators in FD and MPS issues | BC | Design
BD_2mrad_12 | BD_2mrad | downstream diagnostics performance | moderate | SLAC | UK |  |  |  |  | Study performance of downstream diagnostics in presence of tens of kW losses on nearby collimators | BC | Design
BD_2mrad_13 | BD_2mrad | feedback kicker place | moderate | SLAC | UK |  |  |  |  | Feedback kicker inbore of large aperture sextupole or near | BC | Design
[NAME] | BD_2mrad | effect of extraction beam line loss | moderate | (GLD,SID,LDC) |  |  |  |  |  | Study effect of losses in extraction beamline to IR background | BC | Design
BD_2mrad_15 | BD_2mrad | stability of large aperture SC FD | high | LAPP |  |  |  |  |  | Stability of larger aperture SC FD | BC | Hardware
BD_2mrad_16 | BD_2mrad | design straight IR with all acc. Components | moderate | (GLD,SID,LDC) |  |  |  |  |  | Design straight IR with all acc. (bpms, kickers, supports) and [NAME] (lumi, beamcal) components, vacuum chamber w. assembly considerations | BC | Design
BD_2mrad_17 | BD_2mrad | design beam separation with all acc. Components | moderate | (GLD,SID,LDC) |  |  |  |  |  | Design region of in, out and photon beam separation with all accelerator and vacuum components | BC | Design
BD_hdon | BD_Angle | Head-on collision specific
BD_hdon_ES | BD_hdon | Use of electrostatic separator in headon collision
BD_hdon_ES_1 | BD_hdon_ES | Large aperture SC quads | low | Saclay | FNAL | LARP |  |  |  | Large aperture SC quads ([NAME]), may use NbTi for long L*, likely need Nb3Sn for L*=3.5m and E upgrade (LARP and European programs for LHC ongoing, design must be accommodated to ILC requirements) | AC | Design, Hardware
BD_hdon_ES_2 | BD_hdon_ES | Large aperture SC sextupoles | low | FNAL |  |  |  |  |  | Large aperture SC sextupoles ([NAME]?) | AC | Hardware
BD_hdon_ES_3 | BD_hdon_ES | study parastic collision | low | Saclay | SLAC | UK | Orsay |  |  | Study parasitic collisions at nominal and upgrade cases | AC | Design
BD_hdon_ES_4 | BD_hdon_ES | possibility to shorten the FD | low | Saclay | SLAC | UK | Orsay |  |  | Study possibility to shorten the FD to increase separation at parasitic collisions | AC | Design
BD_hdon_ES_5 | BD_hdon_ES | electric separator feasibility and stability | low | Saclay | SLAC |  |  |  |  | Electrostatic separator feasibility and stability (CERN separators in ILC requirements, beam tests?) | AC | Design
BD_hdon_ES_6 | BD_hdon_ES | beam loss on separator plates | low | SLAC | Saclay | UK | Orsay |  |  | Beam, photons & radiative bhabha’s losses on separator plates and protection collimators (plan beam test at ESA?) | AC | Design
BD_hdon_ES_7 | BD_hdon_ES | [NAME] in ES | low |  |  |  |  |  |  | Low vacuum (1nTorr) in electrostatic separators | AC | Design
BD_hdon_ES_8 | BD_hdon_ES | extraction septum quads | low |  |  |  |  |  |  | Extraction septum quads | AC | Design
BD_hdon_ES_9 | BD_hdon_ES | design extraction line | low | SLAC | Saclay | UK | Orsay |  |  | Design extraction line, study feasibility of downstream diagnostics | AC | Design
BD_hdon_rfk | BD_hdon | Use of rf-kicker in headon collision
BD_hdon_rfk_1 | BD_hdon_rfk | similar items of ES items except ES related | low |  |  |  |  |  |  | List is similar as for previous case of head-on with separator, where the electrostatic separator items replaced by:
BD_hdon_rfk_2 | BD_hdon_rfk | Rf kicker feasibility and stability | low | Kyoto |  |  |  |  |  | RF kicker feasibility and stability (tests at Kyoto so far show too low Q factor, to be continued) | AC | Hardware
BD_hdon_rfk_3 | BD_hdon_rfk | MPS issues with RF kicker | low | SLAC | Kyoto |  |  |  |  | Study MPS issues with RF kicker (to be continued) | AC | Design
BD_hdon_rfk_4 | BD_hdon_rfk | possibility of full elimination of dark current in parasitic rf buckets | low | SLAC |  |  |  |  |  | Study possibility of full elimination of dark current in parasitic rf buckets (by collimation below 2% at 250GeV beam, 1% at 500GeV beam) | AC | Design
BD_subsys | BD | Beam Delivery Subsystem
BD_subsys_tuneup | BD_subsys | tuneup beam line
[NAME] | BD_subsys_tuneup | laser wire development | high | UK | EuroTeV |  |  |  | in progress | Develop laserwire with one micron spot-size, tripled light, f/1 optics |  | Hardware
BD_subsys_tuneup_2 | BD_subsys_tuneup | detection of laser wire photons | high | UK | EuroTeV |  |  |  | in progress | Study detection of laserwire signal with scattered photons or electrons |  | Hardware
BD_subsys_tuneup_3 | BD_subsys_tuneup | limiting device for betatron orbit error | moderate | SLAC |  |  |  |  |  | Design a system of consumable (renewable?) devices to limit the amplitude of betatron orbit errors |  | Design
BD_subsys_tuneup_4 | BD_subsys_tuneup | determination of betatron and energy errors | moderate | SLAC | UK |  |  |  |  | Design a system to reliably determine betatron and energy errors |  | Design
BD_subsys_col&bg | BD_subsys | Beam colimation and its background
BD_subsys_col&bg_1 | BD_subsys_col&bg | development of fast extraction system | high | SLAC | UK |  |  |  |  | Development of a fast extraction system (tune-up extraction beamline) to provide the necessary protection for the collimators. Experimental studies of collimator survivability may be performed via material damage beam tests at the SLAC end-station-A [Woods_20050302]. | BC | Hardware
BD_subsys_col&bg_2 | BD_subsys_col&bg | optics optimization between betatron spoilers and FD | moderate | SLAC | UK |  |  |  |  | Optimization of the current optics designs at different crossing angles, to minimize non-linear transport between the betatron spoilers and the final doublet. | BC | Design
BD_subsys_col&bg_3 | BD_subsys_col&bg | reduction of radiation loads | moderate | SLAC | FNAL |  |  |  |  | Reduction of radiation loads at normal operation and beam accidents. | BC | Design
BD_subsys_col&bg_4 | BD_subsys_col&bg | octupole tail folding | high | SLAC | KEK/ATF2 | UK |  |  | in progress | Further study of the use of octupole tail-folding (examined previously for the NLC [LCC118]), possibly with beam tests to verify the principle. (Initial studies of tail folding octupoles for ILC done, see [Seryi_20051102]). | BC | Hardware
BD_subsys_col&bg_5 | BD_subsys_col&bg | evaluation of wakefield effects | high | SLAC | UK |  |  |  | in progress | Evaluation of wakefield effects in the baseline design(s). For previous BDS designs, predicted vertical jitter amplification and emittance dilution were found to be significant [TRC2_p340]. In addition, wakefield measurements are planned at the SLAC end-station-A to optimize collimator geometry, and improve analytical methods of estimating collimator wakefields [Collwake_beamtest_request]. (Initial studies of collimator wakefield in ILC done, see [Jackson_20051102]). | BC | Hardware
BD_subsys_col&bg_6 | BD_subsys_col&bg | benchmarking of simulation codes | moderate | SLAC | UK | EuroTeV | FNAL |  |  | Benchmarking of simulation codes. To see how much our understanding of collimation performance is affected by simulation conventions and approximations. | BC | Design
BD_subsys_col&bg_7 | BD_subsys_col&bg | muon flux attenuation | moderate | (GLD,SID,LDC) |  |  |  |  |  | Muon flux attenuation studies (see next section). | BC | Design
BD_subsys_col&bg_8 | BD_subsys_col&bg | renewable spoiler design | low | SLAC | UK |  |  |  |  | renewable spoiler design and prototyping | AC | Design
BD_subsys_col&bg_9 | BD_subsys_col&bg | damage detection | low | SLAC | UK | FNAL |  |  |  | development of damage detection | AC | Design
BD_subsys_col&bg_10 | BD_subsys_col&bg | study of MPS issues | low | SLAC | UK |  |  |  |  | study of MPS issues | AC | Design
BD_subsys_bg@det | BD_subsys | Background at Detector
[NAME] | BD_subsys_bg@det | Build consistent, realistic BDS+detector integrated models | high | (GLD,SID,LDC) |  |  |  |  |  | Build consistent, realistic BDS+detector integrated models, with detailed magnetic field maps, tunnel and experimental halls. Add engineering realism wherever possible. |  | Design
BD_subsys_bg@det_2 | BD_subsys_bg@det | Generate/refine sub-detector tolerance tables | moderate | (GLD,SID,LDC) |  |  |  |  |  | Generate/refine sub-detector tolerance tables on three levels: (1) pile-up; (2) pattern recognition; (3) radiation damage. |  | Design
BD_subsys_bg@det_3 | BD_subsys_bg@det | Study backgrounds for 3 detector concepts and 2 crossing angles | moderate | (GLD,SID,LDC) |  |  |  |  |  | Study backgrounds for 3 detector concepts and 2 crossing angles: (1) sensitivity windows with respect to tagged origin an bunch crossing; (2) tag origin of backgrounds for all particle types; (3) further explore mitigation methods such as better collimation performance, low-Z masks, muon tunnel spoilers, attenuators or wide-aperture magnets. |  | Design
BD_subsys_bg@det_4 | BD_subsys_bg@det | Code/model benchmarking | moderate | (GLD,SID,LDC) |  |  |  |  |  | Code/model benchmarking; interfacing; [NAME] code/model/map depository. |  | Design
BD_subsys_ext_20mrad | BD_subsys | Extraction line for 20mrad crossing
BD_subsys_ext_20mrad_1 | BD_subsys_ext_20mrad | SC compact quadrupole | high | BNL |  |  |  |  |  | SC compact quadrupole with correcting coils. |  | Hardware
BD_subsys_ext_20mrad_2 | BD_subsys_ext_20mrad | Large aperture warm chicane bends | moderate | SLAC |  |  |  |  |  | Large aperture warm chicane bends. |  | Design
BD_subsys_ext_20mrad_3 | BD_subsys_ext_20mrad | Design extraction optics for 14 mrad crossing angle | low | SLAC |  |  |  |  | completed | Design extraction optics for 14 mrad crossing angle and position of the first extraction quadrupole at 6 m after IP. (DONE) |  | Design
BD_subsys_ext_20mrad_4 | BD_subsys_ext_20mrad | Increase free space for the SC crab-cavity | low | SLAC |  |  |  |  | completed | Increase free space for the SC crab-cavity. (DONE) |  | Design
[NAME] | BD_subsys_ext_20mrad | Include BPMs and correctors where needed | moderate |  |  |  |  |  |  | Include BPMs and correctors where needed. |  | Design
BD_subsys_ext_20mrad_6 | BD_subsys_ext_20mrad | Evaluate effects of magnet field and alignment errors on beam loss | moderate |  |  |  |  |  |  | Evaluate effects of magnet field and alignment errors on beam loss and diagnostics, specify tolerances, provide correction. |  | Design
[NAME] | BD_subsys_ext_20mrad | Specify realistic magnet parameters | moderate |  |  |  |  |  |  | Specify realistic magnet parameters: field and length for required aperture. |  | Design
BD_subsys_ext_20mrad_8 | BD_subsys_ext_20mrad | Include solenoid, anti-solenoid and DID fields | moderate | (GLD,SID,LDC) |  |  |  |  |  | Include solenoid, anti-solenoid and DID fields, provide correction. |  | Design
[NAME] | BD_subsys_ext_20mrad | Include diagnostic wigglers and weak bends | moderate | SLAC |  |  |  |  |  | Include diagnostic wigglers and weak bends. |  | Design
BD_subsys_ext_20mrad_10 | BD_subsys_ext_20mrad | Consider protection collimators | moderate | SLAC |  |  |  |  |  | Consider protection collimators for magnets with large power loss. |  | Design
BD_subsys_ext_2mrad | BD_subsys | Extraction line for 2mrad crossing
BD_subsys_ext_2mrad_1 | BD_subsys_ext_2mrad | Super septum and Panofsky quadrupoles | high | SLAC |  |  |  |  |  | Super septum and Panofsky quadrupoles |  | Design
BD_subsys_ext_2mrad_2 | BD_subsys_ext_2mrad | Large aperture sextupoles | high | LARP |  |  |  |  |  | Large aperture sextupoles [final doublet quadrupoles including pocket coil quadrupole need to be mentioned in IR magnets section of the BCD] |  | Design
BD_subsys_ext_2mrad_3 | BD_subsys_ext_2mrad | Detector integration of large aperture quadrupoles and sextupoles within the detector | moderate | (GLD,SID,LDC) |  |  |  |  |  | Detector integration of large aperture quadrupoles and sextupoles within the detector [based on the feedback on detector opening procedure]. |  | Design
BD_subsys_ext_2mrad_4 | BD_subsys_ext_2mrad | Study possibility to integrate feedback BPM into FD | moderate | UK | SLAC |  |  |  |  | Study possibility to integrate feedback BPM into FD and detect its signal in presence of large offset and of the incoming beam. |  | Design
BD_subsys_ext_2mrad_5 | BD_subsys_ext_2mrad | Integration of the large aperture feedback kicker into FD | moderate | UK | SLAC |  |  |  |  | Integration of the large aperture feedback kicker into FD. |  | Design
BD_subsys_ext_2mrad_6 | BD_subsys_ext_2mrad | Design tungsten liner for QD0 | moderate | SLAC | UK |  |  |  |  | Design tungsten liner for [NAME], to reduces energy density due to radiative [NAME] [this should appear in IR magnet section] |  | Design
BD_subsys_ext_2mrad_7 | BD_subsys_ext_2mrad | Generate a table of tolerable beam losses and radiation loads | moderate | (GLD,SID,LDC) |  |  |  |  |  | Generate a table of tolerable beam losses and radiation loads on superconducting and conventional magnets |  | Design
BD_subsys_ext_2mrad_8 | BD_subsys_ext_2mrad | Optimization of the extraction optics and collimator designs | moderate | SLAC | UK | KEK |  |  |  | Optimization of the extraction optics and collimator designs to minimize the losses on the extraction line magnets |  | Design
BD_subsys_ext_2mrad_9 | BD_subsys_ext_2mrad | Possible range of 3.5m<L*<5m | moderate | SLAC | UK | KEK |  |  |  | Possible range of 3.5m<L*<5m |  | Design
BD_subsys_ext_2mrad_10 | BD_subsys_ext_2mrad | Orbit and angle correction at the IP | high | UK |  |  |  |  |  | Orbit and angle correction at the IP |  | Design
BD_subsys_ext_2mrad_11 | BD_subsys_ext_2mrad | Include solenoid field in to the simulations | high | (GLD,SID,LDC) |  |  |  |  |  | Include solenoid field in to the simulations |  | Design
BD_subsys_ext_2mrad_12 | BD_subsys_ext_2mrad | Design final doublet with QD0 gradient of 250T/m based on the Nb3Ti technology | high | LAPP | Saclay |  |  |  |  | Design final doublet with QD0 gradient of 250T/m based on the Nb3Ti technology |  | Design
BD_subsys_ext_2mrad_13 | BD_subsys_ext_2mrad | Study effect of external solenoid field on the SC quadrupole | high | Saclay |  |  |  |  |  | 1Study effect of external solenoid field on the SC quadrupole |  | Design/Hardware
BD_subsys_ext_2mrad_14 | BD_subsys_ext_2mrad | Mitigation of radiation loads on incoming and outgoing beam SC magnets | moderate | LARP | KEK |  |  |  |  | Mitigation of radiation loads on incoming and outgoing beam SC magnets |  | Design
BD_subsys_crab | BD_subsys | Crab cavity system
BD_subsys_crab_1 | BD_subsys_stab | crab cavity system development | very high | FNAL | UK |  |  |  |  | Cryostat design including cavity tuner, x-y tuner and roll tuner. Effective damping of LOM, damping of modes (SOM) within pass-band of primary deflecting mode and reliable separation of unwanted polarization of deflecting mode, beam pipe HOM coupler for high frequency modes above beam pipe cut-off frequency, search for trapped modes, beam loading. Multipacting simulations in cavity and coupler regions for the deflecting mode operation. Microphonics/rigidity. Evaluation of losses in the crab cavity region as a function of aperture. Evaluation of crab cavity length on extraction line design. | BC | Hardware
BD_subsys_crab_2 | BD_subsys_crab | alternative cavity study | low | FNAL | UK |  |  |  |  | Alternatives: 13 cell CKM, CKM with larger aperture (~5m), NC (normal conducting) cavity (4.5metres) [Adolphsen_20050301], 1.3GHz cavity (~9 meters), 3.9GHz redesigned lower loss shape (~3.5 meters), stiffening rings. | AC | Hardware
BD_subsys_crab_3 | BD_subsys_crab | phase control of cavity | very high | FNAL | UK |  |  |  |  | phase control: Working system built at the operating frequency. Piezo tuners. | BC | Hardware
BD_subsys_crab_4 | BD_subsys_crab | test of phase stability for long distribution | very high | FNAL | UK |  |  |  |  | Distribution test; the full length of line should be tested for phase jitter. Cavity phase stability tests: The phase jitter between two or more cavities should be tested both with and without a beam at full power. | BC | Hardware
BD_subsys_crab_5 | BD_subsys_crab | alternative rf power scheme | low | FNAL | UK |  |  |  |  | Alternatives: High power ferrite phase shifters driven by a single high power klystron, 2nd klystron phase control at high power, individual cavity phase control, RF reference distribution using fiber optics [Naito_PAC2001], use of IOTs (inductive output tube) instead of klystrons if the frequency is appropriate | AC | Hardware
BD_subsys_FBK | BD_subsys | Beam orbit feedback
BD_subsys_FBK_1 | BD_subsys_FBK | intra-train feedback test at ATF/ATF2 | very high | UK | KEK |  |  |  | in progress | The needed r&d includes prototype of the intra-train feedback, being done  at ATF and ATF2 [Nanobeam_Burrows_20051021], |  | Hardware
BD_subsys_FBK_2 | BD_subsys_FBK | BPM beam test at ESA | high | SLAC |  |  |  |  |  | beam-test of BPMs in realistic background conditions planned to be performed at ESA |  | Hardware
BD_subsys_FBK_3 | BD_subsys_FBK | feedback hardware design | high | UK | BNL |  |  |  |  | design work on incorporating kicker and BPM hardware into the final doublet, |  | Design
BD_subsys_stab | BD_subsys | Mechanical stability
BD_subsys_stab_1 | BD_subsys_stab | stability monitoring by interferometry at ATF | high | UBC |  |  |  |  |  | developments of methods to monitor FD stability, e.g. by means of interferometry (tests ongoing at UBC and planned at ATF). |  | Hardware
BD_subsys_stab_2 | BD_subsys_stab | develop method of stability monitoring | high | UK |  |  |  |  |  | Develop methods to monitor and stabilise other (i.e. not FF) critical elements of the BDS by means of interferometric methods. |  | Hardware
BD_subsys_stab_3 | BD_subsys_stab | study of site stability | moderate | KEK | DESY | CERN | FNAL/SLAC |  |  | studies of stability of sites (preliminary data exist for most of the sample sites) |  | Design
BD_subsys_stab_4 | BD_subsys_stab | minimization of vibration by CF | high | SLAC | FNAL |  |  |  |  | investigation and minimization of vibration produced by conventional facility, power supplies, and other in- and near-tunnel equipment |  | Hardware
BD_subsys_stab_5 | BD_subsys_stab | minimization of noise in BDS magnet | high | FNAL | KEK |  |  |  |  | studies and minimization of noises generated at or amplified by the beamline elements in linac and BDS, in particular linac quads in the cryostats and BDS magnets |  | Hardware
BD_subsys_stab_6 | BD_subsys_stab | optimization of stability properties of final doublet | high | EuroTeV | KEK | SLAC | UK |  |  | studies and optimization of stability properties of final doublet. |  | Hardware
BD_subsys_stab_7 | BD_subsys_stab | alignment procedure in BDS | moderate | UK |  |  |  |  |  | Design survey and alignment procedure for all elements in the BDS. |  | Design
BD_subsys_stab_8 | BD_subsys_stab | influence of BDS survey and alignment | moderate | UK |  |  |  |  |  | Evaluate the influence of survey and alignment on the BDS performance. |  | Design
BD_subsys_dump | BD_subsys | Beam Dump
BD_subsys_dump_1 | BD_subsys_dump | window survivability | high | SLAC | UK |  |  |  |  | The required R&D items for the baseline: are a study of window survivability, and the corresponding computation of the displacement per atom (DPA). A window replacement procedure and schedule can then be developed. A prototype of the window and a beam test are also necessary. The required test beam must give similar energy densities in the window as the full ILC machine. Furthermore, some studies of pressure wave formation maybe necessary. | BC | Hardware
BD_subsys_dump_2 | BD_subsys_dump | gas heating of gas dump | low | DESY |  |  |  |  |  | The required R&D items for the alternative design: are studies of gas heating, including ionization effects, and a study of radiation and activation effects. A study of the gas dump windows is also required. A smaller scale prototype of the dump, and some test beam, would also be required. | AC | Hardware
BD_subsys_engy | BD_subsys | Energy monitering
[NAME] | BD_subsys_engy | upstream spectrometer | moderate | EuroTeV | UK |  |  |  |  | Specification of upstream spectrometer calibration and operational procedure. |  | Design
BD_subsys_engy_2 | BD_subsys_engy | spectrometer specific RF-BPM | very high | SLAC | KEK |  |  |  | in progress | Design of spectrometer-specific [NAME]. Underway by several groups. |  | Hardware
BD_subsys_engy_3 | BD_subsys_engy | beam test of RF-BPM | very high | SLAC | KEK |  |  |  | in progress | Stability and performance tests for BPMs and associated readout electronics. Related activity underway at ATF as part of the nBPM program. BPM tests scheduled to start at SLAC ESA at the end of 2005. |  | Hardware
BD_subsys_engy_4 | BD_subsys_engy | downstream spectrometer | moderate | UK | SLAC |  |  |  |  | Detailed simulation of downstream spectrometer performance including realistic magnetic fields and backgrounds. |  | Design
BD_subsys_engy_5 | BD_subsys_engy | large wavelength, large aperture wiggler magnets | moderate | SLAC |  |  |  |  |  | Design and evaluation of large-wavelength, large-aperture wiggler magnets. |  | Design
BD_subsys_engy_6 | BD_subsys_engy | Test of downstream spectrometer quartz fiber readout | high | SLAC |  |  |  |  |  | Test of downstream spectrometer quartz fiber readout scheme, scheduled for SLAC ESA starting in Fall 2005. |  | Hardware
BD_subsys_engy_7 | BD_subsys_engy | BPM-base, SR-base spectrometer test | high | SLAC | UK |  |  |  |  | For the longer term, a full-scale prototype of both a BPM-based and synchrotron radiation-based spectrometer are foreseen for SLAC ESA. |  | Hardware
BD_subsys_lumi | BD_subsys | Luminosity monitering
BD_subsys_lumi_1 | BD_subsys_lumi | LUMICAL:precision comparison for different crossing angle | moderate | (GLD,SID,LDC) |  |  |  |  |  | LUMICAL:  compare precision achievable for different crossing angle geometries and study effects of non-uniformities in the azymuthal distributions of the Bhabha signal and backgrounds from pairs |  | Design
BD_subsys_lumi_2 | BD_subsys_lumi | LUMICAL:event rate at larger polar angle | moderate | (GLD,SID,LDC) |  |  |  |  |  | LUMICAL:  adequate event rate for 10-3 precision can be achieved by going to larger polar angles where there is less effect from a finite crossing angle, but the theoretical uncertainties in the Bhabha rates can be larger at high polar angles.  10-4 relative precision is desired for the Giga-Z option; pair backgrounds for for Giga-Z will be significantly reduced but still need to understand azymuthal effects for the Bhabha signal rate systematics.  These issues need further study. |  | Design
BD_subsys_lumi_3 | BD_subsys_lumi | BEAMCAL:study possible systematics on beam parameter determination | moderate | (GLD,SID,LDC) |  |  |  |  |  | BEAMCAL/Pair monitor:  study possible systematics for its use determining beam parameters and how this is affected by a crossing angle |  | Design
BD_subsys_lumi_4 | BD_subsys_lumi | BEAMCAL:optimize luminosity for different aberation tuning scan | moderate | (GLD,SID,LDC) |  |  |  |  |  | BEAMCAL/Pair monitor:  check that optimizing the pair signal also optimizes the [NAME] luminosity for different aberration tuning scans |  | Design
BD_subsys_lumi_5 | BD_subsys_lumi | BEAMCAL:electron identification | moderate | (GLD,SID,LDC) |  |  |  |  |  | BEAMCAL:  detector requirements and capabilities for electron identification given the high flux and energy deposition of beamsstrahlung pairs; also effect from crossing angle on hermeticity and electron id. |  | Design
BD_subsys_lumi_6 | BD_subsys_lumi | BEAMCAL:detailed detector design | moderate | (GLD,SID,LDC) |  |  |  |  |  | BEAMCAL:   detailed detector design and prototype:  radiation-hard, hermetic, electron id |  | Design
BD_subsys_lumi_7 | BD_subsys_lumi | Other detectors:radiative [NAME] and wide angle beamstrahlung photon detectors | moderate | (GLD,SID,LDC) |  |  |  |  |  | Other Detectors:  radiative Bhabha [Napoly_CERN2000135] and wide-angle beamsstrahlung photon detectors [Bonvicini_PHREV1999] |  | Design
BD_subsys_pol | BD_subsys | Polarimeter
BD_subsys_pol_1 | BD_subsys_pol | [NAME] for 2mrad and 20mrad | moderate | SLAC | UK |  |  |  |  | Comparison of extraction line polarimeters for 2mrad and 20mrad IRs      - backgrounds (synchrotron radiation, disrupted electron beam, beamsstrahlung, radiative [NAME])      - sensitivity to misalignments of spin orientation, collision offsets      - compatibility with energy spectrometer      - requirements and feasibility for chicane magnets | BC | Design
BD_subsys_pol_2 | BD_subsys_pol | spin alignment procedure | moderate | SLAC | UK |  |  |  |  | spin alignment procedures and uncertainties; sensitivity to crossing angle and DID | BC | Design
BD_subsys_pol_3 | BD_subsys_pol | compton laser system design | moderate | (GLD,SID,LDC) |  |  |  |  |  | develop detailed Compton laser, IP and detector designs | BC | Design
BD_subsys_pol_4 | BD_subsys_pol | [NAME] cavity for compton laser | low | EuroTeV |  |  |  |  |  | evaluate use of a Fabry-Perot cavity for the laser at the Compton IP at the upstream polarimeter [Variola_LCWS05]; this technology may have better applications for the laser systems for a Compton-based polarized positron source or a gamma-gamma collider | AC | Design
BD_subsys_FF | BD_subsys | Final Focus
BD_subsys_FF_1 | BD_subsys_FF | chromaticity correction at ATF2 | high | SLAC | UK | KEK/ATF2 |  |  | in progress | Experimental verification of local chromaticity correction, varification of tuning knobs, tail folding octupoles etc | BC | Hardware
DR | Accelerator | Damping Ring
DR_1 | DR | Parameter [NAME]
DR_1.3 | DR_1 | Fill patterns and timing issues
DR_1.3.1 | DR_1.3 | RF frequency
DR_1.3.2 | DR_1.3 | Fill patterns
DR_1.3.2.1 | DR_1.3.2 | Evaluate options for different fill schemes in the damping rings | moderate | INFN Frascati |  |  |  |  | in progress
DR_2 | DR | Beam Dynamics
DR_2.1 | DR_2 | Single-particle dynamics
[NAME] | DR_2.1 | Lattice design
[NAME] | [NAME] | Lattice design for baseline positron ring | moderate | ANL |  |  |  |  | undefined
DR_2.1.1.2 | [NAME] | Lattice design for baseline electron ring | moderate | ANL |  |  |  |  | undefined
DR_2.1.1.3 | [NAME] | Lattice design for alternative positron ring | moderate | SLAC |  |  |  |  | undefined
DR_2.1.1.4 | [NAME] | Lattice design for alternative electron ring | moderate | SLAC |  |  |  |  | undefined
DR_2.1.1.5 | [NAME] | Lattice design for injection/extraction lines | high | LBL |  |  |  |  | undefined
DR_2.1.2 | DR_2.1 | Acceptance
DR_2.1.2.1 | DR_2.1.2 | Characterize the acceptance | high | SLAC |  |  |  |  | undefined
[NAME] | DR_2.1.2 | Optimize the acceptance | high | SLAC |  |  |  |  | undefined
DR_2.1.3 | DR_2.1 | Low-emittance tuning
DR_2.1.3.1 | DR_2.1.3 | Develop strategies for low-emittance tuning | high | CCLRC |  |  |  |  | undefined
DR_2.1.3.2 | DR_2.1.3 | Specify requirements for survey, instrumentation etc. | high |  |  |  |  |  | undefined
DR_2.1.3.3 | DR_2.1.3 | Demonstrate < 2 pm vertical emittance | very high |  |  |  |  |  | in progress
DR_2.1.3.4 | DR_2.1.3 | Specify support scheme for damping ring magnets | high |  |  |  |  |  | undefined
[NAME] | DR_2 | Multi-particle dynamics
DR_2.2.1 | [NAME] | Single-bunch impedance
DR_2.2.1.1 | DR_2.2.1 | Develop single-bunch impedance models | very high | SLAC |  |  |  |  | undefined
DR_2.2.1.2 | DR_2.2.1 | Characterize the single-bunch impedance-driven instabilities | very high | LBL |  |  |  |  | undefined
DR_2.2.2 | [NAME] | Multi-bunch impedance
DR_2.2.2.1 | DR_2.2.2 | Develop long-range wakefield models | very high |  |  |  |  |  | undefined
[NAME] | DR_2.2.2 | Characterize multi-bunch instabilities | very high |  |  |  |  |  | undefined
DR_2.2.2.3 | DR_2.2.2 | Characterize the effects of injection transients | high |  |  |  |  |  | undefined
DR_2.2.3 | [NAME] | Electron cloud
DR_2.2.3.1 | DR_2.2.3 | Characterize e-cloud build-up | very high | SLAC |  |  |  |  | in progress
DR_2.2.3.2 | DR_2.2.3 | Develop e-cloud suppression techniques | very high | SLAC |  |  |  |  | in progress
DR_2.2.3.3 | DR_2.2.3 | Develop modeling tools for e-cloud instabilities | very high | SLAC |  |  |  |  | in progress
DR_2.2.3.4 | DR_2.2.3 | Determine e-cloud thresholds | very high | SLAC |  |  |  |  | in progress
DR_2.2.4 | [NAME] | Ion effects
DR_2.2.4.1 | DR_2.2.4 | Characterize ion effects | very high | SLAC |  |  |  |  | in progress
DR_2.2.4.2 | DR_2.2.4 | Specify techniques for suppressing ion effects | very high | SLAC |  |  |  |  | undefined
DR_2.2.5 | [NAME] | Other collective effects
DR_2.2.5.1 | DR_2.2.5 | Characterize space-charge effects | high | LBL |  |  |  |  | in progress
DR_2.2.5.2 | DR_2.2.5 | Estimate the impact from CSR | moderate | LBL |  |  |  |  | in progress
DR_2.2.5.3 | DR_2.2.5 | Estimate emittance-growth from IBS | moderate | Cockcroft |  |  |  |  | in progress
DR_2.2.5.4 | DR_2.2.5 | Determine the Touschek lifetime | moderate |  |  |  |  |  | undefined
DR_3 | DR | Technical subsystems
DR_3.1 | DR_3 | Injection/extraction kickers
[NAME] | DR_3.1 | Kicker pulser
DR_3.1.1.1 | [NAME] | Develop a high-power fast pulser | very high | KEK |  |  |  |  | in progress
DR_3.1.2 | DR_3.1 | Kicker striplines
DR_3.1.2.1 | DR_3.1.2 | Develop physics design for kicker striplines | high |  |  |  |  |  | in progress
DR_3.1.2.2 | DR_3.1.2 | Develop engineering design for kicker striplines | high |  |  |  |  |  | undefined
DR_3.2 | DR_3 | Damping wiggler
DR_3.2.1 | DR_3.2 | Damping wiggler
[NAME] | DR_3.2.1 | Develop physics design for damping wigglers | moderate | Cornell |  |  |  |  | undefined
DR_3.2.1.2 | DR_3.2.1 | Develop engineering design for damping wigglers | moderate | Cornell |  |  |  |  | undefined
DR_3.3 | DR_3 | Main magnets
DR_3.3.1 | DR_3.3 | Dipoles
DR_3.3.1.1 | DR_3.3.1 | Develop physics design for main dipoles | moderate |  |  |  |  |  | undefined
DR_3.3.1.2 | DR_3.3.1 | Develop engineering design for main dipoles | moderate |  |  |  |  |  | undefined
DR_3.3.2 | DR_3.3 | Quadrupoles
DR_3.3.2.1 | DR_3.3.2 | Develop physics design for quadrupoles | moderate |  |  |  |  |  | undefined
DR_3.3.2.2 | DR_3.3.2 | Develop engineering design for quadrupoles | moderate |  |  |  |  |  | undefined
DR_3.3.3 | DR_3.3 | Sextupoles
DR_3.3.3.1 | DR_3.3.3 | Develop physics design for sextupoles | moderate |  |  |  |  |  | undefined
DR_3.3.3.2 | DR_3.3.3 | Develop engineering design for sextupoles | moderate |  |  |  |  |  | undefined
DR_3.4 | DR_3 | Orbit and coupling correction
DR_3.4.1 | DR_3.4 | Alignment and stabilization hardware
DR_3.4.1.1 | DR_3.4.1 | Specify alignment and stabilization hardware | moderate |  |  |  |  |  | undefined
DR_3.4.2 | DR_3.4 | Orbit and coupling correction actuators
DR_3.4.2.1 | DR_3.4.2 | Specify steering magnets | moderate |  |  |  |  |  | undefined
[NAME] | DR_3.4.2 | Specify skew quadrupoles | moderate |  |  |  |  |  | undefined
DR_3.5 | DR_3 | RF system
DR_3.5.1 | DR_3.5 | RF cavities
DR_3.5.1.1 | DR_3.5.1 | Develop physics design for RF cavities | high |  |  |  |  |  | undefined
DR_3.5.1.2 | DR_3.5.1 | Develop engineering design for RF cavities | moderate |  |  |  |  |  | undefined
DR_3.6 | DR_3 | Vacuum system
DR_3.6.1 | DR_3.6 | [NAME] chamber
DR_3.6.1.1 | DR_3.6.1 | Specify vacuum chamber material and geometry | very high | CCLRC |  |  |  |  | in progress
DR_3.6.1.2 | DR_3.6.1 | Develop engineering design of principal vacuum components | very high | CCLRC |  |  |  |  | undefined
DR_3.6.1.3 | DR_3.6.1 | Characterize vacuum system performance | high |  |  |  |  |  | in progress
[NAME] | DR_3.6 | Vacuum pumps
DR_3.6.2.1 | [NAME] | Specify vacuum pumps | high |  |  |  |  |  | undefined
DR_3.6.3 | DR_3.6 | Vacuum diagnostics and controls
DR_3.6.3.1 | DR_3.6.3 | Specify vacuum diagnostics and controls | moderate |  |  |  |  |  | undefined
DR_3.7 | DR_3 | Bunch-by-bunch feedbacks
DR_3.7.1 | DR_3.7 | Bunch-by-bunch feedbacks
DR_3.7.1.1 | DR_3.7.1 | Specify bunch-by-bunch feedback systems | moderate |  |  |  |  |  | undefined
DR_3.7.1.2 | DR_3.7.1 | Model bunch-by-bunch feedback systems | moderate |  |  |  |  |  | undefined
DR_3.8 | DR_3 | Instrumentation and diagnostics
DR_3.8.1 | DR_3.8 | Beam intensity diagnostics
DR_3.8.1.1 | DR_3.8.1 | Develop beam lifetime instrumentation | high |  |  |  |  |  | undefined
[NAME] | DR_3.8.1 | Develop fast loss monitors | high |  |  |  |  |  | undefined
DR_3.8.1.3 | DR_3.8.1 | Instrumentation for collimation monitoring and protection | high |  |  |  |  |  | undefined
[NAME] | DR_3.8 | Beam position diagnostics
DR_3.8.2.1 | [NAME] | Develop beam position monitors | high |  |  |  |  |  | undefined
DR_3.8.2.2 | [NAME] | Develop feedforward for extraction kicker stabilization | high |  |  |  |  |  | undefined
DR_3.8.3 | DR_3.8 | Beam size (emittance) diagnostics
DR_3.8.3.1 | DR_3.8.3 | Develop high-precision beam size monitor | high |  |  |  |  |  | undefined
DR_3.8.3.2 | DR_3.8.3 | Develop precision bunch-by-bunch beam size monitor | high |  |  |  |  |  | undefined
DR_3.8.3.3 | DR_3.8.3 | Develop instrumentation for measuring injected phase space | high |  |  |  |  |  | undefined
DR_3.8.3.4 | DR_3.8.3 | Develop instrumentation for monitoring emittance damping | high |  |  |  |  |  | undefined
DR_3.8.3.5 | DR_3.8.3 | Develop fast coupling monitor | high |  |  |  |  |  | undefined
DR_3.8.4 | DR_3.8 | Higher-order beam diagnostics
[NAME] | DR_3.8.4 | Develop coherent signal receivers | high |  |  |  |  |  | undefined
DR_3.8.5 | DR_3.8 | Miscellaneous instrumentation
DR_3.8.5.1 | DR_3.8.5 | Develop tune monitors | high |  |  |  |  |  | undefined
DR_3.8.5.2 | DR_3.8.5 | Develop instrumentation for fast dispersion measurement | high |  |  |  |  |  | undefined