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STAR Report – Time Meeting

STAR Report – Time Meeting. Martin Codrington 2/25/2014. Estimate of progress towards STAR’s 14.6 GeV Dataset Goal. Statement of 14.6 GeV Data Set Goal:

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STAR Report – Time Meeting

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  1. STAR Report – Time Meeting Martin Codrington 2/25/2014

  2. Estimate of progress towards STAR’s 14.6 GeVDataset Goal Statement of 14.6 GeV Data Set Goal: To accumulate enough raw event triggers such that, when the data is analyzed, we end up with at least 20 million events of “good” collisions, defined as having Vr (sqrt(vx2 +Vy2) within 1.5 cm of the nominal beamline, and Vz (along the beamline) within +- 30 cm of the center of STAR. Current estimate is using online tracking algorithms. Given lack of final vetting so far by offline reconstruction, and dynamic beam conditions prior to Saturday afternoon (2/22), it still has a fairly large uncertainty. Current estimate is that we have between: 4.5 and 12 million “good” collisions. This is a range of between ~23% and 60% of our goal.

  3. HFT Commissioning The HFT is commissioning the 3 system PXL, IST and SSD A set of runs with selected L4 vertex |Z|<7 cm has been taken for PXL. In each of these latch-up events were observed likely due to beam issues, instabilities, abort gap filling . Will investigate setting further w/o beam. Proceeding very cautiously due to beam conditions in order not to damage detector. IST has collected useful runs to checkout pedestal settings and subtraction. SSD has made good progress in firmware, resolved several issues. Offline software is improving PXL alignments

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