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PHENIX Run-13 status

PHENIX Run-13 status. Hubert van Hecke. Commissioning continues. VTX stripixels. Commissioning was going well in December, but Massive leaks were seen in the outer barrel layer of the VTX ( stripixels )

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PHENIX Run-13 status

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  1. PHENIX Run-13 status Hubert van Hecke Hubert van Hecke - 19 Feb 13 Time meeting

  2. Commissioning continues VTX stripixels • Commissioning was going well in December, but • Massive leaks were seen in the outer barrel layer of the VTX (stripixels) • Removed the East half of the detector, disassembled it, reassembled with only the FVTX, and reinstalled in the IR • Investigation identified galvanic corrosion between carbon and Aluminum as the cause • VTX pixels (inner 2 barrels) and FVTX don’t use Aluminum FVTX VTX pixels FVTX VTX stripixels Hubert van Hecke - 19 Feb 13 Time meeting

  3. Commissioning continues • FVTX back and operating (>98% live channels) • Flammable gas is on since Feb 1, 2-person watch shifts started Jan 22 • Cosmicstakensince 4 Feb, ongoing when no beam • Shielding wall rolled in on7 Feb, area closed up on 8th • Test runs with all (~20) subsystems today Hubert van Hecke - 19 Feb 13 Time meeting

  4. Near-term objectives • When no beam, run cosmics • Cosmics are needed to study momentum smearing, charge-sign efficiencies, trigger issues, backgrounds etc. • Cosmics will be collected in beam down-time periods throughout the run • Commission with beam as it arrives • Access during the day, as needed Hubert van Hecke - 19 Feb 13 Time meeting

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