1. H. MatisTracking Upgrade Review – Dec. 7, 20061 SSD Update Howard Matis

2. H. MatisTracking Upgrade Review – Dec. 7, 20062 Outline  What is the SSD?  Why we need it?  Some tracking results  Current Status  How to upgrade?  Manpower needed to run the detector at its potential  What is the SSD?  Why we need it?  Some tracking results  Current Status  How to upgrade?  Manpower needed to run the detector at its potential

3. H. MatisTracking Upgrade Review – Dec. 7, 20063 The SSD is a Beautiful Detector  The SSD is thin  1% radiation length - double sided Si  The SSD lies at an ideal radius  23 cm - midway between IP and IFC  The SSD has excellent resolution  The SSD is too large to be replaced  The money is better spent elsewhere  The SSD is thin  1% radiation length - double sided Si  The SSD lies at an ideal radius  23 cm - midway between IP and IFC  The SSD has excellent resolution  The SSD is too large to be replaced  The money is better spent elsewhere

4. H. MatisTracking Upgrade Review – Dec. 7, 20064 ~ 60 cm  95  m  4.2 cm strips  300  m thick  Double sided  Crossed at 35 mrad  20 ladders  67 cm long  Air cooled   < 1.2  95  m  4.2 cm strips  300  m thick  Double sided  Crossed at 35 mrad  20 ladders  67 cm long  Air cooled   < 1.2 Two Layers of Tracking

5. H. MatisTracking Upgrade Review – Dec. 7, 20065 Inside the IFC ~ 1 m   xy = 30 µm   z = 700 µm  TPC pointing resolution at the SSD is ~ 1 mm  SSD pointing at the IST is ~ 300  m   xy = 30 µm   z = 700 µm  TPC pointing resolution at the SSD is ~ 1 mm  SSD pointing at the IST is ~ 300  m SSD Facilitates Tracking from the TPC to IST

6. H. MatisTracking Upgrade Review – Dec. 7, 20066 SSD has been used in STAR analysis  Needed for SVT tracking  SSD is essential for SVT analysis  Needed for SVT tracking  SSD is essential for SVT analysis

7. H. MatisTracking Upgrade Review – Dec. 7, 20067 Improves the Impact Parameter Measurement analysis by Jonathan Bouchet cm

8. H. MatisTracking Upgrade Review – Dec. 7, 20068 Resolution here includes vertex and hit resolutions. Real values 20% smaller. Huge difference in pointing between SVT and everything else At infinite momentum limit is ~150 µm in XY and 80 µm in Z (~vertex resolution) At 1 GeV/c, it is 220 µm in xy and 150 µm in z z is our good (not shifting) coordinate! MISSION ACCOMPLISHED TPC +SSD +SVT 1,2,3 Data - Cu + Cu 62 GeV – Impact Parameter 1/p

9. H. MatisTracking Upgrade Review – Dec. 7, 20069 Situation for Upcoming Run  Ran detector on Tuesday  System ran and stable  Obtained pedestals and noise  70% of the detector good for physics - NOW  Should be able to recover rest to 95%  L2 aborts acceptable for rate <30 Hz  SSD not useful for p-p running  Jerome Baudot will visit BNL and instruct new people early next year  Need beam and full detector  Manpower?  Ran detector on Tuesday  System ran and stable  Obtained pedestals and noise  70% of the detector good for physics - NOW  Should be able to recover rest to 95%  L2 aborts acceptable for rate <30 Hz  SSD not useful for p-p running  Jerome Baudot will visit BNL and instruct new people early next year  Need beam and full detector  Manpower?

10. H. MatisTracking Upgrade Review – Dec. 7, 200610 PedestalNoise Ladders 1 - 10

11. H. MatisTracking Upgrade Review – Dec. 7, 200611 PedestalNoise Ladders 11 - 20

12. H. MatisTracking Upgrade Review – Dec. 7, 200612 Maintenance Needed Next Summer Shutdown  Solve the problem with one of the LV power supply boards (ladder 5)  Check all cooling pipes. Understand HV trips (cooling problem?)  Solved if SVT removed  One ladder side (7P) is silent  Fix ADC Board  Might need to replace ladder  Check optical fibers  Need specialized equipment. At BNL?  Fix L2 abort problem  Need 1 month of a SSD Engineer and Tonko  Solve the problem with one of the LV power supply boards (ladder 5)  Check all cooling pipes. Understand HV trips (cooling problem?)  Solved if SVT removed  One ladder side (7P) is silent  Fix ADC Board  Might need to replace ladder  Check optical fibers  Need specialized equipment. At BNL?  Fix L2 abort problem  Need 1 month of a SSD Engineer and Tonko

13. H. MatisTracking Upgrade Review – Dec. 7, 200613 SSD Electronics and the Future Module level - 768 strips per side ( P and N side ) - Analog signal of 1.5  s - 50 mV/MIP - Readout speed : 3 MHz Ladder level - 2 Connexion boards ( 1 per side ) - 2 ADC boards ( 1 per side ) SSD level - 4 Readout Boards (RB) located on the TPC wheels - Each RB interfaces 10 ladders with trigger / daq / slowcontrol - Readout speed : 30 MHz

14. H. MatisTracking Upgrade Review – Dec. 7, 200614 Current Readout Speed  Front end Digitization  FEE runs at 3 MHz  96 chips/ladder side with 128 channels/chip  4.1 ms to digitize a ladder side  Transfer to DAQ via RDO  Readout at 30 MHz  1 RDO/10 ladder sides  4.1 ms for readout  3 ms for 0’s to match TPC DAQ format  7 ms total  Front end Digitization  FEE runs at 3 MHz  96 chips/ladder side with 128 channels/chip  4.1 ms to digitize a ladder side  Transfer to DAQ via RDO  Readout at 30 MHz  1 RDO/10 ladder sides  4.1 ms for readout  3 ms for 0’s to match TPC DAQ format  7 ms total RDO Board

15. H. MatisTracking Upgrade Review – Dec. 7, 200615 How to Upgrade for DAQ1000  For 1.2 ms readout time  Digitize at 10 MHz  Have a RDO for 3 ladder sides -  3  No zeros to fill the ASICS –  2  Opportunity to upgrade firmware  Solve L2 abort problem  Estimated cost (mostly to produce new RDOs ) : ~100 k$  Must verify power distribution and cooling  Need to test concept  To go faster  Add more ADCs on a ladder  Increase # of RDOs  Maximum readout speed at FEE level – 10 MHz  For 1.2 ms readout time  Digitize at 10 MHz  Have a RDO for 3 ladder sides -  3  No zeros to fill the ASICS –  2  Opportunity to upgrade firmware  Solve L2 abort problem  Estimated cost (mostly to produce new RDOs ) : ~100 k$  Must verify power distribution and cooling  Need to test concept  To go faster  Add more ADCs on a ladder  Increase # of RDOs  Maximum readout speed at FEE level – 10 MHz

16. H. MatisTracking Upgrade Review – Dec. 7, 200616 Lessons Learned from STAR Operations  Detector must be tested with full system before each run at BNL  Experts must be available to assist ASAP  Come to BNL if necessary  Train shift crews  Testing slots are limited  Schedule access is not fixed  “Scheduled” accesses should stick to the schedule  SSD must have a “mother” at BNL making sure detector is being used  Detector must be tested with full system before each run at BNL  Experts must be available to assist ASAP  Come to BNL if necessary  Train shift crews  Testing slots are limited  Schedule access is not fixed  “Scheduled” accesses should stick to the schedule  SSD must have a “mother” at BNL making sure detector is being used

17. H. MatisTracking Upgrade Review – Dec. 7, 200617 Need a team to succeed  Physicists  Subsystem leader (1/4 time)  Software coordinator (1/2 time)  Calibration and detector expert (1/2 time and @ BNL)  Subsystem Expert (need at least 2 @ 1/4 time)  Slow controls (1/8 time)  Advice from present experts  People who want to use it for physics  Engineers  French Support (need shops and some travel to BNL)  Mechanical and electrical tech support (several weeks during shutdowns)  Electrical Engineer (when problems occur)  Physicists  Subsystem leader (1/4 time)  Software coordinator (1/2 time)  Calibration and detector expert (1/2 time and @ BNL)  Subsystem Expert (need at least 2 @ 1/4 time)  Slow controls (1/8 time)  Advice from present experts  People who want to use it for physics  Engineers  French Support (need shops and some travel to BNL)  Mechanical and electrical tech support (several weeks during shutdowns)  Electrical Engineer (when problems occur)

18. H. MatisTracking Upgrade Review – Dec. 7, 200618 Runtime hardware support  Requires less effort than the TPC or EMC  Needs person at BNL watching SSD  Advocating and assuring for its inclusion in the run  Basic knowledge of system  Answer simple questions from shift crews  At least two people who can provide  Backup  Advise  Help in access (need fixed access times from RHIC)  Real expert who can consult  FPGA Programming support  Should only need this help during shutdowns  Requires less effort than the TPC or EMC  Needs person at BNL watching SSD  Advocating and assuring for its inclusion in the run  Basic knowledge of system  Answer simple questions from shift crews  At least two people who can provide  Backup  Advise  Help in access (need fixed access times from RHIC)  Real expert who can consult  FPGA Programming support  Should only need this help during shutdowns

19. H. MatisTracking Upgrade Review – Dec. 7, 200619 Shutdown hardware support  Fix known problems  Tend to routine maintenance  Assist if changes needed to SVT cone area  Routine work on infrastructure  People  Team of physicists to work on the detector  Electrical and hardware techs to do infrastructure maintenance  Fix known problems  Tend to routine maintenance  Assist if changes needed to SVT cone area  Routine work on infrastructure  People  Team of physicists to work on the detector  Electrical and hardware techs to do infrastructure maintenance

20. H. MatisTracking Upgrade Review – Dec. 7, 200620 Software support  One person doing daily calibration and checks of the performance  Jerome Lauret requires a software detector leader  responsible for making sure SSD is ready when production starts  People who need SSD for their physics analysis  One person doing daily calibration and checks of the performance  Jerome Lauret requires a software detector leader  responsible for making sure SSD is ready when production starts  People who need SSD for their physics analysis

21. H. MatisTracking Upgrade Review – Dec. 7, 200621

22. H. MatisTracking Upgrade Review – Dec. 7, 200622

23. H. MatisTracking Upgrade Review – Dec. 7, 200623 Summary  SSD provides valuable tracking for current detector and the Inner Tracker  “Low” maintenance calibration  Should be supported by STAR  Can be maintained  Should work for this Au-Au run  STAR must provide sufficient manpower for the SSD to succeed  SSD provides valuable tracking for current detector and the Inner Tracker  “Low” maintenance calibration  Should be supported by STAR  Can be maintained  Should work for this Au-Au run  STAR must provide sufficient manpower for the SSD to succeed