h. matistracking upgrade review – dec. 7, 20061 ssd update howard matis

H. Matis Tracking Upgrade Review – Dec. 7, 2006 1

SSD UpdateSSD Update

Howard Matis


OutlineOutline

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


The SSD is a Beautiful DetectorThe 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


~ 60 cm

95 95 m m 4.2 cm strips 4.2 cm strips 300 300 m thickm thick Double sidedDouble sided Crossed at 35 mradCrossed at 35 mrad

20 ladders20 ladders 67 cm long67 cm long Air cooledAir cooled

< 1.2< 1.2

95 95 m m 4.2 cm strips 4.2 cm strips 300 300 m thickm thick Double sidedDouble sided Crossed at 35 mradCrossed at 35 mrad

20 ladders20 ladders 67 cm long67 cm long Air cooledAir cooled

< 1.2< 1.2

Two Layers of TrackingTwo Layers of TrackingTwo Layers of TrackingTwo Layers of Tracking


Inside the IFC

~ 1 m

xyxy = 30 µm = 30 µm

zz = 700 µm = 700 µm

TPC pointing TPC pointing resolution at resolution at the SSD is ~ 1 the SSD is ~ 1 mmmm

SSD pointing SSD pointing at the IST is ~ at the IST is ~ 300 300 mm

xyxy = 30 µm = 30 µm

zz = 700 µm = 700 µm

TPC pointing TPC pointing resolution at resolution at the SSD is ~ 1 the SSD is ~ 1 mmmm

SSD pointing SSD pointing at the IST is ~ at the IST is ~ 300 300 mm

SSD Facilitates Tracking from the TPC to ISTSSD Facilitates Tracking from the TPC to ISTSSD Facilitates Tracking from the TPC to ISTSSD Facilitates Tracking from the TPC to IST


SSD has been used in STAR analysisSSD 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


Improves the Impact Parameter MeasurementImproves the Impact Parameter Measurement

analysis by Jonathan Bouchet

cm cm

cm cm


• 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

TPC

+SSD

+SSD

+SVT 1,2,3+SVT 1,2,3

Data - Cu + Cu 62 GeV – Impact ParameterData - Cu + Cu 62 GeV – Impact ParameterData - Cu + Cu 62 GeV – Impact ParameterData - Cu + Cu 62 GeV – Impact Parameter

1/p 1/p


Situation for Upcoming RunSituation 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?


Pedestal NoiseLadders 1 - 10


Pedestal NoiseLadders 11 - 20


Maintenance Needed Next Summer ShutdownMaintenance 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


SSD Electronics and the FutureSSD 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


Current Readout SpeedCurrent 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


How to Upgrade for DAQ1000How 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


Lessons Learned from STAR OperationsLessons 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


Need a team to succeed 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)


Runtime hardware supportRuntime 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


Shutdown hardware supportShutdown 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


Software supportSoftware 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


SummarySummary

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

h. matistracking upgrade review – dec. 7, 20061 ssd update howard matis

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