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RHIC Status Update

Spent most of last week raising the bunch number and setting up rebucketing Progress of beam work Energy and storage ramp mechanics are worked out Transmission efficiency > 98% Polarization ~65% at flattop Currently working on getting through rebucketing with high bunch number

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RHIC Status Update

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  1. Spent most of last week raising the bunch number and setting up rebucketing • Progress of beam work • Energy and storage ramp mechanics are worked out • Transmission efficiency > 98% • Polarization ~65% at flattop • Currently working on getting through rebucketing with high bunch number • Losses with 109 on 109 pull the permit RHIC Status Update Time Meeting, V. Schoefer 2/7/12

  2. RHIC Status Update Time Meeting, V. Schoefer 2/7/12 • Speed bumps • Rebucketing setup took somewhat longer than expected • Essentially re-commissioning LLRF this year • Several trips of x-arc due to AC problem in 1000P • Cryo software and communication problem • Frequent trips of the 9 MHz RF while at store • Cavity trips due to a very fast rise in vacuum. Not explained yet • Yellow carbon polarimeters are swamped with noise after rebucketing. • Blue and yellow bunch distributions are the same

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