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STAR Update for C-AD Time Meeting - March 23, 2010

This update provides a summary of the data from the STAR experiment, including the status of the high tower trigger, vertex cuts, and achieved goals. It also discusses the current status and rates of various triggers at STAR.

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STAR Update for C-AD Time Meeting - March 23, 2010

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  1. STAR Update for C-AD Time Meeting March 23, 2010. W.B. Christie Final data Summary for 200 GeV High Tower Trigger No vertex cut Thres. = 5.9 GeV Goal 2000 ub-1 High Tower Trigger Vertex cut ~  40 cm Thres. = 4.2 GeV Base for Upsilon Achieved: 2.8 nb-1 ~140% of Goal Exp. ~ -10% correction Achieved: 1.4 nb-1 ~140% of Goal “min-bias” Trigger Vertex cut ~  40 cm Goal 300 M Top 10% Central Trigger Vertex cut ~  40 cm Goal 250 M Final Tally: 354 Mevts Final Tally: 265 Mevts

  2. Current 62 GeV STAR Trigger Setup Had the bulk of the 62 GeV triggers configured and running, with out final gains/timing cuts, late Friday evening (March 19th).

  3. Current status for min-bias Trigger ZDC gains still to get further gain adjustment. This awaits Wednesday’s access to switch HV card. VPD is set. BBC, with current singles rates, not usable. Once ADC is set, we’ll ~ double rate of event accumulation. Likely starting Thursday. Min-bias evts. Currently VPD & ZDC based (i.e. no BBC)

  4. Various Trigger Counter rates at STAR on Friday evening, March 19th Random BBC Coincidence rates: ~ (Singles rate)2/9.38 MHz ~ 1.8 kHz (Singles = 130 kHz) True collision rates ~ 3 KHz

  5. Various Trigger Counter rates at STAR on Friday evening, March 19th

  6. Various Trigger Counter rates at STAR on Saturday evening, March 20th

  7. Various Trigger Counter rates at STAR today, March 23rd Random BBC Coincidence rates: ~ (Singles rate)2/9.38 MHz ~ 13 kHz (Singles = 350 kHz) True collision rates ~ 3 KHz

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