October 3, 2008 John Haggerty 1 PHENIX Plan for Run 9 John Haggerty Brookhaven National Laboratory

October 3, 2008 John Haggerty 2 PAC Recommendations, May 8-9, 2008 The PAC was asked to prioritize the physics goals listed in the Beam Use Proposals submitted by the STAR and PHENIX collaborations, on both short and intermediate time scales. In view of uncertain short-term budget prospects, the PAC decided to consider Runs 9 and 10 together (notated below as Run 9- 10). We recommend the following “must do” measurements in the order of their priority: 1. Longitudinally polarized proton-proton collisions at √s = 200 GeV with 60% average polarization for weeks, sufficient to record an integrated luminosity of about 25 pb -1 in PHENIX and about 50 pb -1 in STAR. 2. High luminosity Au+Au collisions at √s = 200 GeV for 8-10 weeks, corresponding to an integrated luminosity of nb -1 in PHENIX, to exploit the capabilities of its Hadron Blind Detector (HBD). This will allow both a high precision measurement of the low mass di-lepton spectrum in PHENIX and STAR, and development of transverse stochastic cooling of the Au beams. In addition, it will enable STAR to exploit its new DAQ capability in a high statistics run. 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.

October 3, 2008 John Haggerty 3 Expected run plan According to Steve Vigdor in RHIC News (9/23/2008): Cryo startup Feb GeV Beam in one ring ~1 week later Collisions for development ~Feb 15 Polarization, luminosity, and backgrounds adequate for physics ~Mar 1 If ( budget ~ FY09 request ) { –Switch to 200 GeV longitudinal ~ Apr 15 } else { –End run ~ Apr 15 }

October 3, 2008 John Haggerty 4 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 First goal of upgrade detectors: do no harm

October 3, 2008 John Haggerty 5 HBD HBD has had major surgery at SBU East is now complete in glove box here at SBU West –A problem with the gas system on August 22 resulted in ~100’s ppm O 2 and off-scale H 2 O –Replace GEM’s new CsI –Schedule tight but should be ready for installation when we need it in early November Will need to gain operational experience with DAQ, HV, monitoring, calibration, analysis

October 3, 2008 John Haggerty 6 Muon Trigger Upgrade (KEK, RIKEN, Kyoto, Rikkyo) Major installation effort under way… complete North arm in this shutdown

October 3, 2008 John Haggerty 7 RPC Prototype Resistive Plate Chambers –Fast response –Good spatial resolution –Low cost, CMS experience Installing prototype sector and electronics Engineering run

October 3, 2008 John Haggerty 8 Trigger Board Block Diagram (John Lajoie, ISU) VME Interface P1 P0 P2 P3 12 x xcvr Virtex-5 LX110T 2.8Gbit) (MuTr 2.8Gbit) (MuTr 2.8Gbit) (MuTr 2.8Gbit) One board processes four trigger octants (one octant per tile). Virtex-5 LX110T (9 fibers per octant) Virtex-5 LX110T Virtex-5 LX110T Virtex-5 LX110T 12 x xcvr 12 x xcvr 12 x xcvr

October 3, 2008 John Haggerty 9 Many other detector repairs/improvements Run 6 ERT turnon 8 kHz 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

October 3, 2008 John Haggerty 10 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

October 3, 2008 John Haggerty 11 WW Central arms W +  e + ~21 pb W -  e - ~3 pb (Kensuke Okada) Muon arms W +  + ~10 pb (Ralph Seidl)

October 3, 2008 John Haggerty 12 Issues for 500 GeV Running Magnetic field configuration –HBD needs “field free” bucked central field (“+-”) to be HB –But momentum resolution in central arms is compromised by +- field (needs more quantitative study, but  1.7 mr compared to 2.4 mr for ++ (   ~ 0.5 mr) at 40 GeV Gain changes in EMCAL (present dynamic range set to 20 GeV) ?

October 3, 2008 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)  34% of delivered beam to physics… probably not much different in Run 9

October 3, 2008 John Haggerty 14 Conclusion Thanks to Steve Pate who has agreed to serve as my Spin Coordinator Looks like 500 GeV longitudinal polarized pp (but equally or better prepared for 200 GeV) Run planning document (TN-427) Fair number of upgrade detectors and prototypes, none of them central to physics this year Modest improvements can be expected in trigger, data acquisition, and detectors