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PHENIX Future Plans & Upgrades

PHENIX Future Plans & Upgrades. Stefan Bathe for PHENIX, Users’ Meeting 2009. 2008. 2008. HBD. 2009. 2008. HBD VTX. 2009. 2011. 2008. HBD VTX FVTX. 2009. 2011. 2012. 2008. HBD VTX FVTX. 2009. 2011. 2012. FOCAL. 2013?. 2008. HBD VTX FVTX. 2009. 2011. 2012. FOCAL.

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PHENIX Future Plans & Upgrades

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  1. PHENIX FuturePlans & Upgrades Stefan Bathe for PHENIX, Users’ Meeting 2009

  2. 2008 Stefan Bathe

  3. 2008 HBD 2009 Stefan Bathe

  4. 2008 HBD VTX 2009 2011 Stefan Bathe

  5. 2008 HBD VTX FVTX 2009 2011 2012 Stefan Bathe

  6. 2008 HBD VTX FVTX 2009 2011 2012 FOCAL 2013? Stefan Bathe

  7. 2008 HBD VTX FVTX 2009 2011 2012 FOCAL MuTr FEE 2013? 2009/10 Stefan Bathe

  8. 2008 HBD VTX FVTX 2009 2011 2012 RPC 2010/11 FOCAL MuTr FEE 2013? 2009/10 Stefan Bathe

  9. 2008 HBD VTX FVTX 2009 Pb absorber 2011 2012 RPC 2010/11 FOCAL MuTr FEE 2013? 2009/10 Stefan Bathe

  10. FOCAL FOCAL Muon tracking Muon tracking VTX & FVTX tracking EMC 0 f coverage 2p tracking EMC MuTrig MuTrig MPC MPC -3 -2 -1 0 1 2 3 rapidity Stefan Bathe

  11. signal electron e- partner positron needed for rejection Cherenkov blobs e+ qpair opening angle ~ 1 m Hadron Blind Detector (HBD) • Windowless Cerenkov detector with CF4 avalanche/radiator gas (2 cm pads) • Designed for low-mass dileptons in A+A • Removes Dalitz and conversion pairs (small opening angle) • Comissioned in Run-9 p+p CsI photocathode covering triple GEMs Stefan Bathe

  12. HBD Physics • Study electron continuum in low Mee region • Measure in medium-modifications of r, w,  • Chiral symmetry restoration • Measure temperature (internal conversion of direct photons) arXiv:0706.3034 Stefan Bathe

  13. HBD Performance Measured in Run-9 • Taking data in Runs 9, 10 • Will be replaced by VTX after Run-10 hadron blind few pe background (Dalitz, conversion): 40 photo-electrons ~40 pe Clear separation of signal and background Suppression of background pairs increases effective statistics by factor 8-16 signal (separated electrons): 40 photo-electrons ~20 pe Stefan Bathe

  14. Silicon Vertex (VTX & FVTX) VTX barrel |h|<1.2 • VTX: silicon VerTeX barrel tracker • Fine granularity, low occupancy • 50mm×425mm pixels for L1 and L2 • R1=2.5cm and R2=5cm • Stripixel detector for L3 and L4 • 80mm×1000mm pixel pitch • R3=10cm and R4=14cm • Large acceptance • |h|<1.2, almost 2p in f plane • Standalone tracking • FVTX: Forward silicon VerTeX tracker • 2 endcaps with 4 disks each • pixel pad structure (75mm x 2.8 to 11.2 mm) FVTX endcaps 1.2<|h|<2.7 mini strips Stefan Bathe

  15. VTX Physics • Heavy Flavor as probe of dense partonic matter in A+A • RAA(pT) of single electron from charm decay and beauty decay separately • v2 (pT) of single electron from charm decay and beauty decay separately • Jet tomography (di-hadron, g-hadron, and c-hadron correlation) • Gluon polarization DG(x) in polarized p+p • Double spin asymmetry ALL of heavy flavor production (charm and beauty, separately) • ALL of g-jet PRL 98, 172301 (2007) Stefan Bathe

  16. VTX Performance Expected with VTX (0.4/nb ~3 weeks in RUN11) • Strong suppression of single electrons from heavy flavor is one of most surprising results • Present measurement is mixture of b and c • VTX can separate b and c Stefan Bathe

  17. VTX Progress Pixel Detector Ladder Successful DOE review this week Pixel read-out Test Beam at FNAL Installation in 2010 Strip read-out Strip Detector Ladder Stefan Bathe

  18. FVTX Physics & Schedule Prototype DAQ Electronics • adding high resolution tracking points for muons ahead of the hadron absorber • utilized together with muon arm tracks • quarkonium spectroscopy to probe color screening in medium • Single muons • Background suppression for direct photons in FOCAL • Installation for Run-12 Without FVTX With FVTX Stefan Bathe

  19. The W Energy v.s. Inclination of the track • W program has started • Central arm ready for W measurement at mid-rapidity • Backward/forward measurement needs upgrade W candidates, PHENIX Run-9, p+p@500 GeV Stefan Bathe

  20. Stefan Bathe

  21. RPC B Muon Trigger Rapidity: 1.2 < h <2.2 (2.4) Animation by Ken’ichi Karatsu Basic Idea: Measure Δstrip in online level -> more momentum selective trigger • <Muon Trigger Upgrade> • MuTr FEE Upgrade (MuTRG) • Install RPC (Resistive Plate Chamber) • Install additional Pb absorber • MuID • - only existing trigger • no momentum selectivity..

  22. MuTrig Status • MuTr.N operational for Run-9 • Good efficiency • Engineering run for sectors in 2 RPC planes on south arm • Timing resolution helped understand background already now From collision or out going beam From beam background Stefan Bathe

  23. Muon Trigger Physics: W • W parity violating • Single (longitudinal) spin asymmetry • W selects (anti-)quarks with negative (positive) helicity in polarized beam • Lepton rapidity determined by x of valence and sea quark as well as helicity of neutrino • Polarization of sea quarks Stefan Bathe

  24. W sensitivity (l+ pT>20 GeV) (l- pT>20 GeV) Muon Arms: trigger upgrade is ongoing  will be ready for next 500 GeV run Stefan Bathe Central Arms: ready for W measurement 24

  25. FOrward CALorimeter (FOCAL) • Tungsten absorber with silicon pad readout • 1< h <3 • 2 p azimuth • 24 X0 deep • 3 layers pad readout for lateral and longitudinal shower profile • Reject hadronic background • Si strips within first X0 for g/p0 ID 6cm 17 cm 85 cm Stefan Bathe

  26. pA physics – nuclear gluon pdf FOCAL Physics • Trigger on neutral pions and photons • Provide coincidence measurements with central arm • Constrain kinematics (x) • p+p • Low x gluons • Transverse spin physics • d+Au • Gluon saturation in nucleus • Pin down initial state in HI collisions • Au+Au • g-jet Geant simulation 20 GeVp0 Stefan Bathe

  27. FOCAL Status • R&D ongoing Test beam Stefan Bathe

  28. DAQTRIG2010 Upgrade • Future • 7MHz p+p@500GeV • 2MHz p+p@200GeV • 40kHz Au+Au • Event size *1.7 with Si detectors • Previous trigger strategy won’t work • Currently • DAQ 5kHz bandwidth • Up to Run-7, PHENIX able to record every Au+Aumbias event (in Run-7: 80% of 7 kHz) • In p+p, Lvl1 triggers reduce 200-400 kHz rate to 6kHz of useful events • PHENIX able to effectively sample full luminosity for all rare channels -Stefan Bathe

  29. DAQTRIG2010 Upgrade • Possible solutions • Replace 10-year old EMCal electronics • Medium-scale upgrade to DAQ • e.g. upgrade central data switch to 10 Gigabit networking • Various other small upgrades • BBC w/ multiple vertex selection • MuID Trigger FPGA upgrade • VTX integration trigger Stefan Bathe

  30. Timeline RHIC PHENIX RUN9 First 500 GeV pp mTrig FEE (half) long 200 GeV pp RUN10 stoch. cooling 2 mTrig FEE(full) mTrig RPC(South) RUN11 EBIS (U+U) VTX mTrig RPC(North) RUN12 56 MHz RF FVTX (electronlensing?) RUN13 (e cooling AGS?) (Forward Cal?) Stefan Bathe

  31. Energy Scan • PHENIX seriously looking into low energy running • Low energy task force founded; reported in May • Suggestion to focus at first between full and injection energy • Opportunity to investigate dileptons in new energy regime with HBD • Physics • How do dilepton excess and r modification at SPS evolve into large low-mass excess at RHIC? • opacity of the produced medium, elliptic flow • onset of perfect liquid properties • Search for critical point • Search for 1st order phase transition Stefan Bathe

  32. Beyond the next couple years . . . • Transverse spin physics to understand nucleon • pA to understand initial state of HI collisions • DG with direct g and g-jet in high luminosity 200 GeVp+p (cleaner than p0) • g-h, g-jet in high-luminosity Au+Au to measure modification of fragmentation function • . . . Stefan Bathe

  33. Conclusions • PHENIX has healthy upgrade program to carry current exciting results to further understanding • Immediate plans (next two years) determined by upgrade installation schedule (HBD, VTX) • Successful physics program relies on sufficient funding for 10 weeks each of HI and Spin running each year • Many opportunities for immediate and long-term future Stefan Bathe

  34. 2008 HBD VTX FVTX 2009 Pb absorber 2011 2012 RPC 2010/11 FOCAL MuTr FEE 2013? 2009/10 Stefan Bathe

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