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UPTIME

STAR Time Meeting Report April 08, 2014 Salvatore Fazio. UPTIME. ~ 83 %. successful week for STAR Uptime 83% (was 79 % as of April 1 st ). R unning strategy. High initial rates  Three trigger configurations for physics:

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UPTIME

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  1. STAR Time Meeting ReportApril08, 2014Salvatore Fazio UPTIME ~83% • successful week for STAR • Uptime 83% (was79% as ofApril1st) S. Fazio

  2. Running strategy • High initial rates Threetrigger configurations for physics: • High lumi (ZDC > 55 kHz) :PXL + IST taken out (we pump di-muon, photon triggers) • Mid Lumi (ZDC 55-40 kHz) and Low (ZDC 40 kHz) : PXL + IST in (priority gradually given to HFT program) Current Projections on reaching Data Set Goals (luminosity program) di-muon L2 gamma Current projections now largely exceed our expectations for rear events program S. Fazio

  3. Current Projections onData Set Goals (minimum bias) Hours/day PXL #evts PXL+IST Good uptime (ZDC < 55 Hz) in the past week for our HFT program 19 h stores? That’s nice! HFT min-bias Collisions Central PXL • Last week projection  we can catch up with our goals if continue running with enough uptime • Central PXL still falling short S. Fazio

  4. HFT -PXL status HFT part of routine operations with very few issue that requires expert intervention PXL operational parameters have been optimized Including Latch-up threshold, and reset of ladders The performance of the and status of inner ladders have stabilized. No change since ~ 3/30 Graph shows dead/bad (black,red) and good,usable (green, blue) as determined by QA for inner ladder 3/30 4/8 S. Fazio

  5. Track Pointing (DCA) resolution [TPC+IST+PIXEL] Au+Au 200GeV/c preliminary DCA-XY [cm] DCA-Z [cm] 50 μm 1/p [GeV/c]-1 1/p [GeV/c]-1 MCS term • Lines are fits to function: Vertex, Detector and Mis-Alignment Resolution terms Data from March 22 S. Fazio

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