RHIC Running: Returned to low beta* set-up last night, after a one hour access for PHENIX to "flip a switch" and STAR to search for and fix instabilities in their data acquisition. With 56x56, the ZDC rates at PHENIX were 8kHz, very good. But lifetime was very poor. An attempt was made to fill with 109 bunches at 1e11, but the BLAM shut the work down for an hour, and the decision was made to return to pp83 (rather than pp83lowbeta) ramp file for the night's physics store at 1.3e11 with 105x98 bunches giving 9kHz for PHENIX ZDC. Polarization was 48/40 at store, with 54% from AGS, running with Run08 set-up. Haixin is working on transitioning to Run06 settings. After spending the night working on it, we are probably ready to inject with emittances and polarization at the level of Run06.
After the morning store is dumped, we will swap the JET from Yellow to Blue.
There will also be work on tune adjustment to get the tunes on opposite sides of the diagonal.
| Scheduling Physicist: Mike Sivertz | Last updated: |
| Email: sivertz@bnl.gov | |
| Office Phone: 631-344-6102 | |
| Digital Pager: 7528 or 4300 | |
| Home Phone: 631-878-9020 |