PHENIX Upgrades PHENIX has a phased strategy to
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PHENIX Upgrades PHENIX has a phased strategy to q Complete q Enhance q Extend 08 -Sep-00 the current detector its capabilities its physics reach PHENIX Upgrades
Completion l Complete the central arms (2001) q q q l Prepare for muon physics (2001) q q l l Install South Muon Magnet with 3 stations of tracking Instrument South Muon Identifier panels Complete vertex detector (2001 -2) Commission (2001 -2) q q l 4 additional sectors of EMCal readout 2 additional sectors of TEC readout Install Pad Chambers 2 and 3 in West Arm Appropriate triggers Additional DAQ bandwidth (NB: All detectors and front ends allow running at x 10 Au-Au design luminosity) Complete North Muon Arm (2002 -3) 08 -Sep-00 PHENIX Upgrades
In Pictures For 2001 Run: 08 -Sep-00 PHENIX Upgrades
Enhancing Capabilities Planned and potential enhancements: q Upgrade Time Expansion Chamber to a TRD u Instrument all six planes (currently four) u Install radiators u Upgrade gas system (to recirculate Xe mixture) èImproved e/p rejection at high momentum q Upgrade RICH u From current gas ( CO 2 ) to Ethane èImproved photon yields for better e/p rejection q Upgrade muon spectrometers u Instrument anode wires èImprove pattern recognition at high multiplicities 08 -Sep-00 PHENIX Upgrades
Extending Physics Reach l Low-mass dileptons q q q l Direct detection of open charm q q l q Detection of leading proton (Roman pots? ) Characterization of nuclear break-up (multiplicity array at “forward” h) Extended photon detection capabilities q q l Extraordinary requirement on vertexing capabilities May be combined with design of Dalitz rejector Extended proton-nucleus capabilities q l Requires better Dalitz rejection to measure pair for m(e+e-) < ~ r mass Goal: Improve S/B from ~1/10 to 10/1 Anticipated in original design of PHENIX (note “Hadron Blind Detector” from R = 50 -200 cm) High-resolution pre-shower detector Deploy in “massless gap” of West Arm Extended jet detection capabilities Full azimuthal tracking q Benefits both spin and HI measurements 08 -Sep-00 q PHENIX Upgrades
