RHIC Polarized Proton FY05 Run Schedule
Content
Goal for 205GeV development
establish ramp to 205 GeV
to explore
1. the polarization behavior beyond 100 GeV
2. the contribution of orbit distortion to the amount of polarization loss at snake resonances. This shall provide us a guidance for the re-alignment during the summer shutdown
provide collisions at Ös = 410 GeV
for experiments
Setup & Configuration
Lattice (IP 6 8 10 12 2 4)
v Injection: 10 10 10 10 10 10
v Store: 2 2 10 5 3 10
Beam energy
v Injection: Gg=46.5
v Store: Gg=391.5
Working point:
v Qx=28.73, Qy=29.72: ramp from injection to 100GeV
v Qx=28.69, Qy=29.68: from 100 GeV to flattop and store
Golden orbit
v Zero orbit
snakes & spin rotators
v snakes: on at DC from injection to flattop
v spin rotator: off
experiment magnets:
v STAR: On at full field from injection to flattop
v Phenix: On at full field from injection to flattop
RF setup:
v No re-bucketing
Shift Schedule
May 31 0800 – May 31 2400
o 8 bunch ramp development
o Adjust orbits/tunes/chromaticities along the ramp to maximize transmission
efficiency
o Tunes: Qx=0.69,
Qy=0.68
o Orbits: rms
~ 0.5mm or better
o Separation bump through the ramp
May 31 2400 – June 1 1600
o Global decoupling along the ramp
o Local IR non-linear correction
June 1 1600 – June 2 0800
o 56 bunch ramp development
o Fine adjustment of tunes/chromaticities
o Polarization measurement along the
ramp
o Collision setup
o Cog beam into collision, fine
adjust orbits/optics to minimize the beam decay
June 2 0800 – June 2 1600
o Store setup: IP6, IP8, IP10
o Steering setup
o Collimation setup
June
2 1600 – June 3 0800: store at 205 GeV
o Parasitically study the dependence
of the resonance strength at 135GeV on the orbit distortion
Shift Schedule
Web address
Office phone
(631)344-3397
Last revised: May. 24, 2005