PHENIX FUTURE PLANS UPGRADES Stefan Bathe for PHENIX

PHENIX FUTURE PLANS & UPGRADES Stefan Bathe for PHENIX, Users’ Meeting 2009

2008 2 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 3 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 4 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX 5 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX FOCAL 2013? 6 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX FOCAL 2013? 7 Mu. Tr FEE 2009/10 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX RPC 2010/11 FOCAL 2013? 8 Mu. Tr FEE 2009/10 Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX Pb absorber RPC 2010/11 FOCAL 2013? 9 Mu. Tr FEE 2009/10 Stefan Bathe Users’ Meeting 2009

Muon tracking MPC EMC Muon tracking MPC Mu. Trig 0 VTX & FVTX -3 10 EMC 2 p f coverage Mu. Trig -2 -1 0 Stefan Bathe 1 2 Users’ Meeting 2009 3 rapi

Hadron Blind Detector (HBD) 11 Windowless Cerenkov detector with CF 4 avalanche/radiator gas (2 cm pads)signal electron partner positron needed for rejection Designed for low-mass dileptons in A+A Removes Dalitz and conversion pairs (small opening angle) Comissioned in Run-9 p+p e Cherenkov blobs e+ q pair opening angle ~ 1 m Cs. I photocathode covering triple GEMs Stefan Bathe Users’ Meeting 2009

HBD Physics 12 Study electron continuum in low Mee region Measure in mediummodifications of r, w, Chiral symmetry restoration Measure temperature (internal conversion of direct photons) ar. Xiv: 0706. 3034 Stefan Bathe Users’ Meeting 2009

HBD Performance 13 few pe hadron blind Measured in Run 9 Taking data in Runs 9, 10 Will be replaced by VTX after Run-10 background ~40 pe (Dalitz, conversion): 40 photo-electrons signal ~20 pe (separated electrons): Clear separation of signal and background Suppression of background pairs increases effective statistics by factor 8 -16 40 photo-electrons Stefan Bathe Users’ Meeting 2009

Silicon Vertex (VTX & FVTX) VTX barrel |h|<1. 2 VTX: silicon Ver. Te. X barrel tracker Fine granularity, low occupancy Stripixel detector for L 3 and L 4 FVTX endcaps 1. 2<|h|<2. 7 80 mm× 1000 mm pixel pitch R 3=10 cm and R 4=14 cm Large acceptance 50 mm× 425 mm pixels for L 1 and L 2 R 1=2. 5 cm and R 2=5 cm |h|<1. 2, almost 2 p in plane Standalone tracking FVTX: Forward silicon Ver. Te. X tracker 2 endcaps with 4 disks each Stefan Bathe pixel pad structure (75 mm x 2. 8 to Users’ Meeting 2009 11. 2 mm)

VTX Physics 15 PRL 98, 172301 (2007) Heavy Flavor as probe of dense partonic matter in A+A RAA(p. T) of single electron from charm decay and beauty decay separately v 2 (p. T) of single electron from charm decay and beauty decay separately Jet tomography (di-hadron, ghadron, 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 Stefan Bathe Users’ Meeting 2009

VTX Performance 16 Expected with VTX (0. 4/nb ~3 weeks in RUN 11) 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 Users’ Meeting 2009

VTX Progress 17 Pixel Detector Ladder Pixel read-out Successful DOE review this week Test Beam at FNAL Installation in 2010 Strip read-out Strip Detector Ladder Stefan Bathe Users’ Meeting 2009

FVTX Physics & Schedule 18 Prototype DAQ Electronics Without FVTX With FVTX 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 Stefan Bathe Users’ Meeting 2009 FOCAL

The W 19 Energy v. s. Inclination of the track W program has started Central arm ready for W measurement at mid-rapidity W candidates, PHENIX Run-9, p+p@500 Ge. V Backward/forward measurement needs upgrade Stefan Bathe Users’ Meeting 2009

20 Stefan Bathe Users’ Meeting 2009

Muon Trigger Rapidity: 1. 2 < h <2. 2 (2. 4) 21 Animation by Ken’ichi Karatsu <Muon Mu. ID Trigger Upgrade> • Mu. Tr FEE Upgrade (Mu. TRG) - only existing trigger • Install RPC (Resistive Plate Chamber) - no momentum selectivity. . • Install additional Pb absorber Basic Idea: Measure Δstrip in online level -> more momentum selective trigger

Mu. Trig Status 22 Mu. Tr. 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 Users’ Meeting 2009 Stefan Bathe From beam background

Muon Trigger Physics: W 23 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 Stefan Bathe Users’ Meeting 2009 Polarization of sea

W sensitivity 24 (l+ p. T>20 Ge. V) (l- p. T>20 Ge. V) Muon Arms: trigger upgrade is ongoing will be ready for next 500 Ge. V run Stefan Bathe Users’ Meeting 2009 Central Arms: ready for W measurement 24

FOrward CALorimeter (FOCAL) 25 Tungsten absorber with silicon pad readout 1< h <3 2 p azimuth 24 X 0 deep 6 cm 17 cm 3 layers pad readout for lateral and longitudinal shower profile 85 cm Reject hadronic background Si strips within first X 0 for g/p 0 ID Stefan Bathe Users’ Meeting 2009

FOCAL Physics 26 Trigger on neutral pions and photons Provide coincidence measurements with central arm Constrain kinematics (x) p+p p. A physics – nuclear gluon pdf d+Au Geant simulation 20 Ge. V p 0 Low x gluons Transverse spin physics Gluon saturation in nucleus Pin down initial state in HI collisions Au+Au g-jet Stefan Bathe Users’ Meeting 2009

FOCAL Status 27 R&D ongoing Test beam Stefan Bathe Users’ Meeting 2009

DAQTRIG 2010 Upgrade 28 Currently DAQ 5 k. Hz bandwidth Up to Run-7, PHENIX able to record every Au+Au mbias event (in Run-7: 80% of 7 k. Hz) In p+p, Lvl 1 triggers reduce 200 -400 k. Hz rate to 6 k. Hz of useful events PHENIX able to effectively sample full luminosity for all rare channels Future 7 MHz p+p@500 Ge. V 2 MHz p+p@200 Ge. V 40 k. Hz Au+Au Event size *1. 7 with Si detectors Previous trigger strategy won’t work -Stefan Bathe Users’ Meeting 2009

DAQTRIG 2010 Upgrade 29 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 Mu. ID Trigger FPGA upgrade VTX integration trigger Stefan Bathe Users’ Meeting 2009

Timeline 30 RHIC RUN 9 (half) PHENIX First 500 Ge. V pp m. Trig FEE long 200 Ge. V pp RUN 10 stoch. cooling 2 m. Trig FEE(full) m. Trig RPC(South) RUN 11 EBIS (U+U) VTX m. Trig RPC(North) Stefan Bathe Users’ Meeting 2009 RUN 12 56 MHz RF FVTX

Energy Scan 31 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 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 1 st order phase transition Stefan Bathe Users’ Meeting 2009

32 Beyond the next couple years. . . Transverse spin physics to understand nucleon p. A to understand initial state of HI collisions DG with direct g and g-jet in high luminosity 200 Ge. V p+p (cleaner than p 0) g-h, g-jet in high-luminosity Au+Au to measure modification of fragmentation function. . . Stefan Bathe Users’ Meeting 2009

Conclusions 33 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 longterm future Stefan Bathe Users’ Meeting 2009

2008 2009 HBD 2011 VTX 2012 FVTX Pb absorber RPC 2010/11 FOCAL 2013? 34 Mu. Tr FEE 2009/10 Stefan Bathe Users’ Meeting 2009