Spreadsheet: 0a35f7b3-b53d-4782-97fb-ff5ec07a0400
Sheet: Sheet1

AREA | 5/8/2007 | Unnamed: 2 | At T0 | Unnamed: 4 | Unnamed: 5 | Unnamed: 6 | At time T1 | Unnamed: 8 | Unnamed: 9 | At time T2 | Unnamed: 11 | At time T3 | Unnamed: 13 | Unnamed: 14 | MITIGATION | Unnamed: 16
 | Concern |  | RISK | COST | r*C |  | RISK | COST | r*c | RISK | COST | RISK | COST |  |  | COMMENTS/NOTES
E- SOURCE | (1) Inadequate Availability | Q | Med | 30 | 7.5 | E/P | Low | 30 | 3 | Low | 30 |  |  |  | Implement dual redundant injectors | Dominated by CF&S decision on space [NAME] and conversation 4/7/07
E+ SOURCE | (0) Any problem leading to reduced e+ yield | Q |  |  | 0 | S5 | 0 |  | 0 |  |  |  |  | Q | 20 TO 100% increase in undulator length | Dominate by CF&S costs Ref Sheppard 4/5/07
E+ SOURCE | (1) Low Undulator Strength |  | Low | 2.5 | 0.25 | E/P | Low | 2.5 | 0.25 | Low | 2.5 |  |  | Q | Engineer reduced aperture | See (0) [NAME] 4/5/2007
E+ SOURCE | (2) Design of Target Mechanics |  | Low | 7.5 | 0.75 | E/P | Low | 7.5 | 0.75 | Low | 7.5 |  |  |  | More engineering | [NAME]
E+ SOURCE | (3) Flux Concentrator or OMD Performance |  | Med | 5 | 1.25 | E/P | Med | 5 | 1.25 | Med | 5 |  |  | Q | Explore alternate design or longer undulator | See (0) [NAME] 4/5/2007
E+ SOURCE | (4) Remote Handling of Target etc |  | Low | 10 | 1 | E/P | Low | 10 | 1 | Low | 10 | 0 | 0 |  | Engineering studies and CF&S mods | CF&S Impact Ref Sheppard 4/5/07
E+ SOURCE | (5) Photon Beam Dump Window | Q | Low | 2 | 0.2 | E/P | Low | 2 | 0.2 | Low | 2 | 0 |  |  | Move dumps by 2km | Could be generic problem with dumps. Impact on CF&S needs study. Sheppard 4/5/2007
E+ SOURCE | (6) Low  gradient in warm capture sections at full power | Q | Med | ? | 0 | E/P | ? | ? | 0 | ? |  | Med | 10 |  | Longer Undulator | See (0) [NAME] 4/5/2007
E+ SOURCE | (7&8) Low E+ Capture |  | Med |  | 0 | S5 |  |  | 0 |  |  | Med | 10 | Q | Longer Undulator | See (0) [NAME] 4/5/2007
E+ SOURCE | (9) Target Lifetime |  | Low | 20 | 2 | S5 | Low | 20 | 2 | Low | 20 | Low | 20 |  | Redundant target assembly and facility | Large CF&S impact, cost not included. [NAME] 4/5/2007
DR | (1) Secondary Emission Yield too high. >1.2 | Q | High | 200 | 100 | S3 | Low | 200 | 20 | VeryLow | 200 | VeryLow | 200 | Q | Return to two e+ ring design after extensive R&D programs | [NAME] designs have been changed to allow this possibilty. Ref JMP 3/27/07
DR | (2) Vacuum system design not robust |  | Med | 20 | 5 |  | Low | 20 | 2 | Low | 20 | VeryLow | 60 |  | Redesign vacumm system with more distributed pumping | Early decision is less expensive and less impact on other systems Ref JMP 3/27/07
DR | (3) High impedance of vacuum chamber components |  | Med | 10 | 2.5 | S3 | Low | 10 | 1 | Low | 10 | VeryLow | 10 |  | More engineering design or DR re-optimization | Could be input to review of design parameter range Ref JMP 3/27/07
DR | (4) RF Margin | Q | Med | 50 | 12.5 |  | Low | 50 | 5 | Low | 50 | VeryLow | ? | Q | Increase klystron/cavity system by 50% | Coupled with items,5,6, has large impact on CF&S Ref JMP 3/27/07
DR | (5) Combination of concerns with RF and [NAME] layouts | Q | Med | 100 | 25 |  | Med | 100 | 25 | Med | 100 | VeryLow | 10 |  | Increase in number of shafts and alcoves | CF&S impact coupled with 4,6 Ref JMP 3/27/07
DR | (6) Plan for having room for future double ring, later decision | Q | Low | 20 | 2 |  | Low | 20 | 2 | VeryLow | 20 | VeryLow | ? |  | Increase tunnel diameter and include above (5) | Ref JMP 3/27/07
DR | (7) General concern with injection/extraction kicker performance |  | Med | 20 | 5 | S3 | Low | 20 | 2 | Low | 20 | VeryLow | 5 | Q | Increase no of kicker units and/or restrict parameter ranges | Ref JMP 3/27/07
RTML | (1) Packing fraction to tight | Q | Med | 12 | 3 | E/P | VeryLow | 12 | 0.12 | 0 | 0 | VeryLow | 5 |  | Engineering design and modifications | CF&S impact in EDR Ref PT 3/30/07
RTML | (2) Beam Motion at end of RTML Too Large |  | Low | 2 | 0.2 | E/P | Low | 2 | 0.2 | Low | 2 | Low | 2 |  | Engineering supports | Ref PT 3/30/07
RTML | (3)Optical Effects in RTML |  | Low | 5 | 0.5 |  | VeryLow | 5 | 0.05 | VeryLow | 5 | VeryLow | 5 |  | Plan on wrapping line with mu-metal | Ref PT 3/30/07
RTML | (4) Space charge tune shift in RTML |  | Med | 5 | 1.25 |  | Low | 5 | 0.5 | Low | 5 | low | 5 |  | Diagnostics and  correction systems | RefPT 3/30/07
RTML | (5) Ion Instability in e- line |  | Low | 5 | 0.5 | E/P | Low | 5 | 0.5 | Low | 5 | Low | 5 |  | Lower pressure, pumping and bakeout Re-enginner collimatordesigns | Ref PT 3/30/07
RTML | (6) [NAME] |  | Low | 5 | 0.5 | E/P | Low | 5 | 0.5 | Low | 5 | Low | 5 |  |  | Shared problem other systems Ref PT 3/30/07
RTML | (7) Emittance Dilution : Magnetostatics |  | High | 10 | 5 | E/P | Med | 10 | 2.5 | Low | 10 | Low | 10 |  | Simulations,studies, | Ref PT 3/30/07
RTML | (8) Emittance Dilution Pitched RF Cavities |  | High | 20 | 10 | E/P | Low | 20 | 2 | Low | 20 | Low | 20 |  | instrumentation, and corrections
RTML | (9) Bunch Compressor Phase Stability |  | Med | 60 | 15 |  | Low | 60 | 6 | VeryLow | 20 | VeryLow | 20 | Q | Measurements and ILC Parameter Optimisation | Complex tradeoffs with Meas and DR Parameters Ref PT 3/30/07
RTML | (10) Performance of Feedforward |  | High | ? | 0 | E/P | High | ? | 0 | Med | ? | Med | ? | Q | Engineering and application of intra-train feedback
Linac | (1) Klystron Lifetime |  | Low | 100 | 10 | S7 | Low | 100 | 10 | Low | 100 | 0 | 0 |  | Running many prototype test stands through T2 | Cost increase to implement new design? Ref C Adolphsen 4/1/07
Linac | (2) Breakdown in RF Distribution Systems | Q | Low |  | 0 | S1 | Low |  | 0 | Low | ?? | Very Low | 25 |  | Replace various components | Question of increasing number of high power feed lines?? [NAME]
Linac | (3) Design Gradient | Q | Med | 600 | 150 | S1 | Med | 600 | 150 | Med | 600 |  |  |  | Continuing R&D program | Cost for changing design to 28 MV/m Major CF&S impact Ref C. A. 4/1/07
Linac | (4) Performance of Production Cavities |  |  |  | 0 | S2 |  |  | 0 | Low | 50 | Very Low | 0 |  | Improved quality control | Ref C.A. 4/1/07
Linac | (5) Cryogenic Load Capacity |  | Med | 60 | 15 | S1 | Med | 60 | 15 | VeryLow | 0 | VeryLow | 60 |  | Measurements on string tests? | Ref C.A. 4/1/07
Linac | (6) Vacuum Integrity |  |  |  | 0 |  |  |  | 0 | ?? | ?? | VeryLow | 200 |  | Upgrades and retrofits | Large impact? Ref C.Adolphsen 4/1/07
Linac | (7) Energy gain variations | Q |  |  | 0 |  |  |  | 0 |  |  | Low | 50 |  | Install energy spectrometers | How? Impact on other systems, CF&S Ref C.A. 4/1/07
Linac | (8) Errors in Beam-Based Orbit Control (Systematic) | Q |  |  | 0 |  |  |  | 0 |  |  | Med | 60 |  | Repace instrumentation and diagnostics | How? Impact on other systems. Ref C.A. 4/1/07
BDS | (1) Final Doublet Jitter |  | High | 30 | 15 | [NAME] | Med | 30 | 7.5 | Med | 30 | Low | 50 |  | Continuing engineering studies and prototypes | Impact on instrumentation and feedback systems. [NAME] 3/27/07
BDS | (2) [NAME] too large | Q | Med | 50 | 12.5 | [NAME] | Med | 50 | 12.5 | Med | 50 | Med | 50 | Q | Install longer muon or magnetized walls | Impact on CF&S in make space for option in EDR Ref  A Seryi 3/27/07
BDS | (3) Prompt Push Pull Operation |  | High | 50 | 25 | E/P | Med | 50 | 12.5 | Low | 50 | 0 | 0 |  | [NAME] engineering | If not achieved, live with consequences?! [NAME] Seryi 3/27/07
BDS | (4) Adequacy of Beam Dumps        windows, shielding etc | Q | Med | 50 | 12.5 | E/P | Med | 50 | 12.5 | Low | 50 | VeryLow | 100 |  | Longer tunnels, more shielding etc | CF&S decisions by EDR or site selection Ref A Seryi 3/27/07
BDS | (5) Laser wire Diagnostics | Q | High | 30 | 15 | E/P | Med | 30 | 7.5 | Low | 30 | Low | 20 |  | Engineering and prototypes. Tunnel length | Tunnel length question? [NAME] 3/27/07
BDS | (6) Collimation Performance | Q | Med | 50 | 12.5 | E/P | Low | 50 | 5 | Low | 20 | Low | 20 |  | Measurements and studies | Tunnel length question? [NAME] 3/27/07
BDS | (7) Crab Cavity Performance |  | High | 20 | 10 | [NAME] | Med | 20 | 5 | Low | 20 | Low | 50 | Q | Engineering and prototype tests | If failure at T3, rebuild whole system Ref A Seryi 3/27/07
BDS | (8) Fast Feedback Performance |  | Med | 20 | 5 | E/P | Low | 20 | 2 | Low | 20 | Low | 50 | Q | Expts and studies at ATF2 etc | If failure at T3 rebuild system [NAME]
BDS | (9) Energy & Polarization Diagnostics |  | High | 20 | 10 | E/P | Med | 20 | 5 | Low | 20 | Low | 20 |  | Design and prototyping | Ref A Seryi 3/27/07
BDS | (10) Performance of FF Optics |  | Med | 200 | 50 | [NAME] | Low | 200 | 20 | 0 | 0 | 0 | 0 | Q | Continuing studies at ATF2 | Ref A Seryi 3/27/07
BDS | (11) FD size and 14mrad | Q | Med | 20 | 5 | E/P | Low | 20 | 2 | 0 | 0 | 0 | 0 | Q | [NAME] engineering and prototyping | Ref A Seryi 3/27/07
Ops/avail | (1) MPS cannot protect Linac | Q | Med | 30 | 7.5 |  | Low | 30 | 3 | VeryLow | 0 | Low | 20 |  | Warm inserts, pilot bunches and kickers | Impact on CF&S Ref: T Himel 3/30/07
Ops/avail | (2) MPS needs high speed monitoring OTHERS |  | Low | 1 | 0.1 |  | Low | 1 | 0.1 | VeryLow | 0 | Low | 5 |  | Dedicated high speed links requ'd | Impact on controls Ref T Himel 3/30/07
Ops/avail | (3) Device has lower MBTF than planned | Q | Low |  | 0 |  | Low |  | 0 |  |  |  |  |  | Should this be included or is it part of the component cost uncertainty. See Himel 3/30/07
Ops/avail | (4) More hardware for phased commissioning | Q | High | 10 | 5 |  | High | 10 | 5 | 0 | 0 | 0 | 0 | Q | Temporary dumps and shielding walls. | Unknown impact on CF&S See Himel 3/30/07
Ops/avail | (5) Radiation too high in support tunnel or alcoves | Q | Low | 20 | 2 | E/P | Med | 20 | 5 | 0 | 0 | Low | 20 | Q | More distance between tunnels and longer cables etc | Impact on CF&S and other systems. See Himel 3/30/07
Total | Total |  |  |  | 563 |  |  |  | 357.42