SSD Operations

1
SSD Operations

• Lilian Martin
• SUBATECH

2
Run IV Operations (I)

• 10 ladders installed
• 4 RDO (reading 5 half-ladders each) installed
• SSD in the runs during the AuAu period (60 14
  Mevents)
• Data taking problems
• 1 RDO became silent around mid-Feb. (current
  explanation a component died on the RDO board)
• 2 RDOs became silent after the shutdown prior to
  the pp period (power cable disconnected)
• FEE chips on full ladders were erratically
  loosing their bias (parasitic RESET produced on
  the ADC boards)

3
Run IV Operations (II)

• One compressor failure ie no cooling (no
  explanation, power cycling fixed it)
• Few slow control VME board failures (OK after a
  reboot)
• No correct handling of the L2_ACCEPT signal (bug
  in the RDO FPGA ?)
• Operation features/problems
• Relatively easy to operate
• Slow Control GUI modified during the run
• Operation Manual updated during the run
• Online histograms added during the run
• Alarm handler prepared but not activated during
  the run
• 2 remote detector experts but nobody on site

4
Run V plans (I)

• Install 10 more ladders in July (7 already
  produced)
• Fix or change the failing RDO board
• Fix the RESET problem on the ladders (signal not
  used by the slow control anyway)
• Fix the L2_ACCEPT problem this summer (need
  suitable DAQ and trigger components for the
  tests)
• Revisit the slow control GUI, operation guide,
  Online histograms
• Integrate the SSD alarms to the STAR alarm
  handler
• Define some typical plots and distributions for
  the QA
• Use the SSD electro. logbook to record SSD
  problems
• Try to have an expert on site (any person from
  BNL willing to learn is welcome)