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PHENIX In Run 9

PHENIX In Run 9. John Haggerty Brookhaven National Laboratory. Run 9 assumptions. PAC recommendation:

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PHENIX In Run 9

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  1. PHENIX In Run 9 John Haggerty Brookhaven National Laboratory John Haggerty

  2. Run 9 assumptions PAC recommendation: 3. Longitudinally polarized proton-proton collisions at √s = 500 GeV for 5 weeks to allow beam development and commissioning by C-AD, a first measurement of W boson production in PHENIX, and background studies in STAR. John Haggerty

  3. Run 9 planning Run 9 planning is fairly far along • Beam Use Proposal and PAC guidance • Planning document (TN-427) 200 GeV pp • October DC meeting parade of systems • December physics/trigger/daq/analysis DC meeting • Steve Pate agreed to serve as Spin Coordinator John Haggerty

  4. Physics goals at 500 GeV • Measure backgrounds under high pT muons • Test muon trigger electronics (currently being installed) • Measure production cross sections 0,  to pT ~ 30 GeV, J/,  • Measure ALL for 0,  • With 25 pb-1 record W’s in central arm • ~500 W+ and ~90 W- • First look at AL and cross section John Haggerty

  5. Central arm W • Modify EMCAL gain • Develop analysis • Cross section measurement • First look at AL Central arms W+e+ ~21 pb W-e- ~3 pb John Haggerty

  6. Detector issues for 500 GeV running • Magnetic field configuration • HBD needs “field free” bucked central field (“+-”) • But momentum resolution in central arms is compromised by reduced field • EC agreement to switch field to “++” after first week of physics running • Gain changes in EMCAL (present dynamic range set to 20 GeV); mostly done with laser, should be close at beam startup John Haggerty

  7. Upgrade detectors in run 9 • Upgrade detectors in Run 9 are partial installations or engineering runs: • HBD • Muon Trigger (MUTR FEE upgrade) • Muon RPC prototype • Absorber in muon arm • First goal of upgrade detectors: do no harm John Haggerty

  8. HBD • HBD.W installed • HBD.E scheduled for installation December 16 • Will need to gain operational experience with DAQ, HV, monitoring, calibration, analysis • “+-” field configuration necessary for HBD operation John Haggerty

  9. Muon trigger upgrade • 3 components • MuTr electronics • RPC layers • Trigger logic RPC1 RPC3 Major installation effort under way… will complete North arm MuTr FEE upgrade in this shutdown John Haggerty

  10. RPC prototype • Resistive Plate Chambers • Fast response • Good spatial resolution • Low cost, CMS experience • Installing prototype sector and electronics • Engineering run John Haggerty

  11. 12 x xcvr 12 x xcvr 12 x xcvr 12 x xcvr Virtex-5 LX110T Virtex-5 LX110T Virtex-5 LX110T Virtex-5 LX110T Muon trigger board One board processes four trigger octants (one octant per tile) Testing of prototype late in the run (RPC1,3 @ 2.8Gbit) P1 VME Interface P0 (MuTr St2 @ 2.8Gbit) P2 (MuTr St1 @ 2.8Gbit) (MuTr St3 @ 2.8Gbit) Virtex-5 LX110T P3 (9 fibers per octant) John Haggerty

  12. Many other detector repairs/improvements • DAQ improvements to increase livetime, event rate • EMCAL/RICH trigger efficiency improvements • DC and PC repairs • MUTR high voltage stability • Could be some additional small tests/prototypes for upgrades 8 kHz Run 6 ERT turnon John Haggerty

  13. Operational Efficiency • Review of operational efficiency at S&T Review July 7-9, 2008 • Short summary (from Run 8 d+Au): • 50% in vertex cuts (no change expected) • 77% uptime (modest improvements possible, but less with development) • 89% livetime (slight improvement possible with higher rates) John Haggerty

  14. Final days schedule • Need to complete MuTrig installation, remove scaffolding; install HBD, RPC prototype • Expecting closing up the shield wall beginning of January, 2009 then safety and detector checkout John Haggerty

  15. RHIC/PHENIX interaction • Magnetic field change “+-” to “++” shortly after physics run begins • Tunnel access for RPC3 prototype during startup • Optimizing the big three: luminosity, polarization, background • Improve communication with MCR (discussion with Lee Hammons) John Haggerty

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