# Presentation: 592894

## Review Schedule

- The FVTX upgrade project 	Melynda Brooks
- Silicon Sensor, Chip, Readout	Jon Kapustinsky
- Mechanics	 		Walt Sondheim
- Readout DAQ			LANL/Columbia
- Cost & Schedule 		Dave Lee
- Electrical Integration	 	Eric Mannel
- Documents Provided:
*FVTX Specification Document*
*Sensor specifications and quotes*
*Structural and Thermal Analyses Documentation*
*FPHX Chip Specification Document(LANL) and  Conceptual Design Document (FNAL)*
*Radiation Environment Study (M. Prokop)*
*Wire Bonding Quotes*
*Cost Data Sheets*

## Forward Vertex Tracking Detector (FVTX)

- Melynda Brooks, LANL
- Forward Vertex Detector Review
- BNL, 19-Feb-2007
- Outline:
- Physics Motivation
- Design Requirements
- Detector Design
- Performance: detector and physics
- Efforts required
- Cost and Schedule Summary
- People

## Physics Motivation

- Silicon Vertex Tracker for Forward Rapidity:
- Tag displaced  vertices to allow precision heavy flavor measurements
- Significantly enhances every aspect of the Muon Arms Physics Program
-  Complements Barrel Tracker which will cover central rapidity

## Physics Motivation

- Measuring Charm and Beauty
- D, B mesons travel ~1 mm (with boost) before semi-leptonic decay to muons
- By measuring DCA to primary vertex,
- can separate D and B from prompt particles
- and long-lived decays like , K

## Detector Specifications

- Enough planes to get 3 or more hits on most tracks within the Muon Acceptance4 planes with maximal r/z coverage
- Good enough DCA resolution to find primary vertices and separate D, B from prompt and long-lived decays75 m pitch strips
- Low enough occupancy in Central AuAu to have efficient track finding75m pitch, with 3.75° phi
- Ability to match tracks to muon system tracks  resolution, hits

## Detector Performance

- Full PISA simulation
- Digitize strips, find clusters, get centroid
- Use Kalman Filter Fit to fit and project to z_vertex
- Get DCA components in r (good) and phi (less good)
- ~100 m resolution in r and ~500 m resolution in phi
- Multiple-scattering dominated resolution
- Sufficient resolution to separate prompt, heavy quark, and light meson decays.

- (r)

## Alternate Detector Configurations Under Study

- Stereo angles for strips		           Phi staggering at each station

- (r)

## Heavy Quark Signal Extraction with FVTX

- Signal:Background for heavy-quark:decay muons+punch-throughs <1 before FVTX
- Place cut  DCAmin < DCA < DCAmax
- Signal:Background>1 over all pT after FVTX DCA cuts (each background reduced by ~*10)

## Heavy Quark Signal Extraction with FVTX

- Improved S:Bsmaller statistical **and** systematic errors
- Heavy quark cross sectionRAA become viable with FVTX
- Same for p+p asymmetry measurements

- *Xiaorong Wang

## Separating Charm and Beauty

- Beauty measurements by:
- BJ/
- event topology cuts in single muon events
- kinematic cuts (pT, DCA fits)

- Direct Beauty Measurement

- Event Topology

- Charm/Beauty pT

- *Michael Malik

## W physics

- W signal enhanced by: DCA cuts, isolation cuts, match track in FVTX (removes neutral  )
- Deep track *3
- Quality cuts *2
- Isolation, Neutral, and DCA Cut *6
- Shower Cut in MuID *5

- *Zhengyun You, Ming Liu

- Pythia Min. Bias and W events through full reconstruction

## Physics Programs Accessible With FVTX

- Single Muons:
- Clean heavy quark and hadron measurements at forward rapidity
- Separation of charm and beauty measurements
- W measurement significantly improved (possible)
- Dimuons:
- Drell-Yan becomes possible over large mass range
- Vector meson measurements much improved
- Direct measurement of c-cbar events becomes possible
- Direct measurement of BJ/ becomes possible
- Physics:
- Advance understanding of energy loss, flow in medium by adding precise heavy quark measurements of RAA and flow.
- More precise vector meson measurements plus heavy quark allow detailed understanding of vector meson production and modification
- Cold nuclear matter effects: energy loss, gluon saturation better understood
- Much more precise gluon polarization and sea quark measurements

## Efforts Required for FVTX

## Detector Development

- Standard silicon technology for silicon min-strip sensors
- Modification of existing FPIX chip for readout
- Must develop connection between readout chip and readout boards, “HDIs”
- Mechanical and cooling plans
- Simulation and Analysis

## DAQ Development, Requirements

- 4320 chips/arm, 2 data pairs/chip, 6 download lines/chip, zero-suppressed data streaming out, 1728 Gbps streaming out per arm when all chips are firing (AuAu event)
- Need to reduce I/O lines coming out of enclosure
- Must fit within in space constraints and have manageable cooling
- Must integrate with VTX detector

- PHENIX DAQ

- Readout DAQ

## Lvl-1 Participation Highly Desireable

| Existing Trigger
MuID 1-Deep | Achieved Rejection | Rejection needed 2008 | Rejection needed RHIC-II |
| --- | --- | --- | --- |
| p+p | 478 | 478*21 | 478*71 |
| Au+Au | 5 | 5*15 | 5*116 |

| Existing Trigger  MuID | Achieved Rejection | Rejection needed 2008 | Rejection needed RHIC-II |
| --- | --- | --- | --- |
| p+p
1-Deep 1-Shallow | 23500 | < 23500 | 23500*1.4 |
| Au+Au
2-Deep | 15.7 | 15.7*5 | 15.7*37 |

- Single Muon Rejection Needed

- Dimuon Rejection Needed

- Gives goal that we would like to deliver all FPIX/PHX data to FEM/Lvl-1 within 4 beam clocks
- But, PHENIX can accommodate Lvl-1 decision taking as long as 40 beam-clocks (could take up to 28 clocks more or 7* as much time?)
- Iowa State has verified p+p displaced vertex Lvl-1 algorithm
- From above, any participation in Au+Au should be pursued also

## Efforts Needed, Institutional Commitments

- Silicon Sensor: prototype production and testing, final production and testing
- Czech collaborators, UNM, LANL
- Readout Chip:  design, prototype, production and testing
- Ray Yarema’s group (FNAL), LANL oversight
- HDI: design, prototype, production, testing and assembly
- UNM, LANL
- Readout DAQ:  design, prototype, production, testing and assembly
- LANL/Columbia
- Detector Q&A, Assembly, Installation, Commisioning:
- Multiple institutions
- Mechanical and Cooling: detector assembly, support, enclosure design prototype and production, analyses; cooling needs assessed, designed, production
- HYTEC, LANL
- Integration:
- Mechanical Integration Robert Pak (BNL), Walt Sondheim (LANL)
- Electrical Integration – Eric Mannel (Columbia)
- Simulation and Analysis: Supporting design, advancing simulation to offline analysis stage
- Saclay, LANL, NMSU, Peking, BARC, Finland

## Critical Development Issues

- FPHX Development – critical path
- Conceptual design completed
- need R&D funds to take to layout and protoyping this year to maintain schedule
- Silicon Sensor Development – critical path
- Need prototypes this year to test with FPHX chip to maintain schedule.
- Czech collaborators providing prototype, expect to help with full production
- Readout DAQ Development
- LDRD DAQ same as FVTX (and driven by FVTX) to get maximum benefit from LDRD ($ covers most all R&D, experience gained...)
- LDRD schedule requires that board layout begin now
- Many mechanical issues (VTX and FVTX) require detailed design now
- Full concept of DAQ at LANL
- Entirely parallel development has taken place at Columbia
- LANL board design for ROC (most critical item) should support either proposal seen today
- All subsequent talks (except Dave W’s) base cost, schedule, mechanical and cooling analyses on the “LANL design”
- Cannot afford to continue to support two designs

## Collaborating Institutions

- Los Alamos National Laboratory
- Bhabba Atomic Research Centre
- Brookhaven National Laboratory
- Columbia University
- Iowa State University
- Charles University, Czech Technical University, Institute of Physics, Academy of Sciences,  Prague
- New Mexico State University
- Saclay
- University of New Mexico
- University of Jyvaskyla
- Yonsei University

## Management Structure

## Cost and Schedule for FVTX

- Schedule:
- LANL and  BNL R+D required
- Design and prototype chip+ silicon		now	01/08
- Design and prototype DAQ interface	now	12/07
- Construction:
- Production + assembly				01/08	06/10
- DAQ Interface, LV, HV...				parallel
- Installed						10/10
- Cost
- LANL R+D:		$714k
- BNL R+D:		$175k
- Construction:		$3.67M + 24% contingency = $4.57M

- Details in Dave’s Cost and Schedule talk

## Review Schedule

- The FVTX upgrade project 	Melynda Brooks
- Silicon Sensor, Chip, Readout	Jon Kapustinsky
- Mechanics	 		Walt Sondheim
- Readout DAQ			LANL/Columbia
- Cost & Schedule 		Dave Lee
- Electrical Integration	 	Eric Mannel
- \

## Backups

## LDRD Forward Silicon Project from LANL

- All DAQ interface efforts will be directly applicable to FVTX project
- Pixels rather than mini-stripssimilar number of channels and cards to deal with as FVTX project
- Experience from data analysis will be directly applicable

- Approximately one octant’s worth of silicon tracking provided within 3 years
- BTeV-designed silicon and readout chip used, but readout chip will have almost identical digital section to this project
- Much Shared R+D:

## “Bonuses”  FVTX brings

- Overall improvement in track resolution for muon physics
- Overall background improvement using DCA and even topology cuts in all muon physics programs
- e- separation for the NCC
- Lvl-1 capability, Improvement in p+p event efficiency
- Improved Reaction Plane measurement

## Why?—Improvement of Forward Rapidity Muon Measurements

- Physics observables  with Muon Arms plus FVTX:
- Vector Mesons
- Open heavy flavor
- Hadrons

- Simulation

**Each and every physics measurement from the muon arm will be improved with the addition of the FVTX and new measurements will become available **

## Why?—Limitations of Current Measurements

- Many current measurements with PHENIX detector are quite limited because of large systematic errors associated with large backgrounds

- MB AuAu J/ with Background

- Single Muon Spectra

- Based on Real Data

## How FVTX Can Help

- Single muon components can be separated from each other, greatly reducing systematic errors on open heavy flavor measurements
- Decay muons can be removed from dimuon background and dimuon mass resolution will improve.  All dimuon measurements (vector mesons, Drell-Yan, correlated and uncorrelated open heavy flavor) will have less background

## Why Forward Rapidity?

- Improvement in  rich Muon-Arm physics program:
- pp, dAu, AuAu programs all improved significantly
- Forward Rapidity brings critical kinematic extension with much better systematic errors than current measurements to:
- Separate various cold- and hot-nuclear matter effects
- Map out distribution functions over broader x-range

## LastGap==4

- Factor ~ 3

- Quality cut
- Factor ~ 2

## SvxConeHit = 0

- Factor ~ 6

- Muid Show and ConeHit = 0 (r=50cm)
- Factor ~ 5

## Sigma of distance from all muid hits of track to the track  (p>20GeV)

- Sigma of distance from all _**muid**_ hits of track to the track  (p>20GeV)

- W

- Punch thr.

- π/K decay

- cm

## Lvl-1 Timing, or NOT

- Gives goal that we would like to deliver all FPIX/PHX data to FEM/Lvl-1 within 4 beam clocks
- But, PHENIX can accommodate Lvl-1 decision taking as long as 40 beam-clocks (could take up to 28 clocks more or 7* as much time?)
- IF there were no Lvl-1 participation requirement, requirement is that we get data to DCMs within 50 s:

-  Chip, Roc Propagation

- FEM Buffering, Propagation

- ~400 clocks later data delivered to DCM

- All data could be sent out serially on a single line, even for AuAu and a large number of chips, and get to DCM with no problem