Jerome Baudot, Strasbourg

1
Silicon Strip Detector status report
STAR Collaboration MeetingBNL, 16 July 2004
? Report on last year Completion this year
Jerome Baudot, Strasbourg
2
SSD structure

• Strip detectors
• double sided
• 2? in r?, -1lt?lt1
• 500k channels
• Performances
• sRF 20 mm
• readout 5 ms(4 RDO boards)
• air cooled
• Command (JTAG)
• initialize FEE
• slow control

a module
a ladder
3
How many ladders do we have ?
run III
run IV
½ SSD 10 ladders 160 modules
1 ladder 16 modules
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Operations in run IV

• Monitoring
• 1st Slow Control version
• 1st histos set in Online
• No alarms handling
• Electronic logbook

• AuAu data 6014 Mevts
• 1 RDO board died mid-february
• 2 others RDO unplugged ! for pp
• FEE eratically loosing bias (know how to fix)
• 1 air compressor failure
• No L2 accept

5
Data analysis

• The basics
• pedestal as expected
• noise
• S/N

6
We do see particles
Landau fit
P side
same charge collectedon both sides particles
N side
7
Data analysis pedestal instability
15 January
2 April
dead RDO board
8
Production status now

• Modules
• gt160 done
• Ladders
• (10 already installed)
• 9 done
• ladder 0
• 2 spares done

Detector completedthis summer
1 new sector (out of 2) of 5 ladders
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Installation for summer 2004

• 2-22 August
• get new sectors of 5 ladders
• redispatch mounted ladders -gt sect 7 lad
• test all 4 sectors (2x32x7)
• shielding
• test RDO boards (1 new)
• install new power supplies
• change pedestal compensation (against fluctuation)

• gt23 August
• rolling in
• test
• Integration
• L2 acept
• alarm handling
• no more Reset (FEE bias)

run IV
run V
old sector
new sectors
old sector
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SSD software integration

• Already completed
• Daq SsdReader
• Ssd hit reconstruction
• StiSsd (almost done, not yet reviewed, need to be
  tuned)
• Almost done
• Databases (Geometry and Calibration) defined,
  currenctly filling
• Need more work
• Alignement starting from StSvtAlignment ? (used
  for the SSD sometime ago)

11
SSD in GSTAR
Material distribution and radiation
length