Run-5 Cu-Cu Integrated Luminosity

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Presentation transcript:

RHIC Heavy Ion Operations THE RHIC TEAM Brookhaven National Lab LHC-LUMI-2005 Arcidosso

Run-5 Cu-Cu Integrated Luminosity RHIC Run 5 Delivered s= 200 GeV/u Cu-Cu Luminosity b*=0.85m (0.89m) b*=2.6m b*=3.0m (calendar) time at store: 53% Cu-Cu ZDC cross section measured at 2.6 barn Accurate average luminosity prediction (8x1027 cm-2 s-1) and slope projections Beta squeeze from 1m to 0.85 m (measured 1.1 m to 0.89 m) In-run optimization of intensity and number of bunches

RHIC Availability and Time in Store Excellent availability (82%) despite very complex operational modes. Machine setup time reduced to 2.5 weeks. Time in store (53%) comparable to successful Au-Au Run-4 run Goal is 60% time in store

Weekly Cu-Cu Luminosity and Physics Time Run5 Cu-Cu 100 GeV Delivered Integrated Luminosity by Week 101 hours/week is 60% calender time in store

Turn-Around-Time (TAT) Run5 Cu-Cu (s=200 GeV) Average: 75 minutes between physics stores Blizzard Equiment failures Power dips Experiment accesses Pressure rise Permit pulls Quench link interlocks Turn-around-time: Beam dump to next declaration of physics store

5-Year RHIC Performance Nucleon-pair luminosity A1A2L delivered to PHENIX HI Luminosity exceeding design in three years

RHIC HI Achieved and Planned Parameters Mode No of bunches Ions/bunch [109] b* [m] Lstore ave [cm-2s-1] A1A2Lstore ave [cm-2s-1] A1A2Lstore peak Au-Au design 56 1.0 2 21026 81030 311030 d-Au [Run-3] 55 (110) 120d/0.7Au 31028 61030 241030 Au-Au [Run-4] 45 1.1 1 41026 161030 581030 Cu-Cu [Run-5] 36 4.5 0.85 801026 321030 791030 Au-Au enhanced 112 81026 1241030 For s=200 GeV/n Au-Au, the enhanced luminosity goal (c. 2008, before electron cooling) is Lstore ave = 8x1026 cm-2 s-1 4x design 2x achieved