a n dy status commissioning with colliding beams p p at s 500 gev
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A N DY Status Commissioning with colliding beams (p  +p  at s=500 GeV). L.C.Bland, for AnDY 15 February 2011 Time Meeting, BNL. Jet Trigger Commissioned on Saturday 12 February. ADC from Berkeley group (“QT”) has FPGA used to form 17-bit sum of 12-bit ADC from each of 32 channels

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a n dy status commissioning with colliding beams p p at s 500 gev
ANDY StatusCommissioning with colliding beams (p+p at s=500 GeV)

L.C.Bland, for AnDY

15 February 2011

Time Meeting, BNL

jet trigger commissioned on saturday 12 february
Jet Trigger Commissionedon Saturday 12 February
  • ADC from Berkeley group (“QT”) has FPGA used to form 17-bit sum of 12-bit ADC from each of 32 channels
  • 32-bit data from four QT per HCal module transferred to second FPGA board from Berkeley (DSM), where 19-bit sum of four terms is made
  • Threshold on 19-bit sum is then used as trigger
  • HCal energy scale still to be determined

RHIC clock tick before trigger

RHIC clock tick after trigger

jet trigger events
Jet Trigger Events
  • Select from jet-trigger events for HCal “high-tower” to be centered in module
  • Display for each detector of each module the ADC count as color scale (black=greatest count yellow=lowest count)
  • Events look “jetty”, as expected
issues and plans for next access possibility and beyond
Issues and Plansfor next access possibility and beyond
  • Resolve a few remaining single-channel issues
  • Reduce HCal gain
  • We are in “production” now with a jet trigger >29M jet events recorded since Sunday.
  • No significant on luminosity at IP6,8 yet
  • Following access, in coming week…
  • ECal final calibration
  • Commission additional triggers
schematic of detector for run 11
Schematic of detector for Run-11
  • Equipment in place:
  • HCal is two existing 9x12 modules from E864 (NIM406,227)
  • ECal are two small lead-glass modules from BigCal at JLab
  • BBC (from PHOBOS) and ZDC
  • Preshower is newly constructed scintillator arrays
  • Goals:
  • Establish impact of 3IR operation on PHENIX/STAR luminosity
  • Calibrate HCal
    • relative gain via cosmic-ray m
    • absolute energy scale via r,L,KS…
  • Measure hadronic backgrounds to benchmark simulations
  • Measure jet analyzing power (Lint~10 / pb, P=50%)
ip2 in january 2011 run 11 staging of a n dy

Trigger/DAQ electronics

Left/right symmetric HCal

Left/right symmetric

ECal

Blue-facing BBC

Left/right symmetric preshower

Beryllium vacuum pipe

IP2 in January, 2011Run-11 Staging of ANDY

See http://hena.lbl.gov/IP2/Business/status/<date> for pictures of progress

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