Summary of RHIC Performance during the FY07 Heavy Ion Run'
- K. A. Drees
graphite foil downstream of Tandem as indicated in the Figure. This charge state survives well in the Booster vacGold ions for the 2007 run 111 of the Relativistic Heary uum  and allows sufficient energy gain in Booster to ef'0' Col'ider (RfIIC) at Brookhaven National Laborato'~ ficiently remove all but two before injection into (BNL) are accelerated in the Tandem, Booster and AGS AGS. In the past we have used charge state +32 in order prior to into The and performance of to stay easily within voltage and current constraints on the this chain of accelerators is reviewed with a focus on imBooster main magnet power supply. This year we were able provements in the quality of bean1 delivered to RHIC. In to operate within these constraints with charge state +31. particular, more uniform Booster The result has been a 20% increase in the number of ions and AGS7 and a new bunch merging scheme in AGS have available for Booster injection. This year we also acquired provided beam bunches with reduced longitudinal emitand tested several pglcmz graphite foils formed by laser tance for RHIC. plasma ablation. These were found to last some three times Blue ~ing<>~ellow Ring