RHIC Running: Gruesome weekend. The accelerator is not behaving in a reproducible manner. There are many problems, including instabilities that cause the emittance of the Yellow beam to blow up. Emittance at injection to the Booster is about 5p mm-mr, but by the time the beam reaches RHIC it is about 10p mm-mr and growing. Under some circumstances the emittance growth is much greater, only we are not clear about what those circumstances are. Power supply problems in RHIC (bo11-qd3-ps) required an access to replace the faulty supply. Controls had to restart two RHIC managers.
Angelika will do a vernier scan at the end of the morning store, around 11:00AM.
The AGS L-10 cavity tripped off again, as it has been giving problems all weekend. When the L-10 drops out, the bunch intensity is low, and sometimes "baby bunches" develop in deuterons.
In addition, Booster-to-AGS synchro is having problems during Au set-up.
Development of polarized protons has progressed well. Protons have been
brought out of the AGS. No polarization measurement yet in the AGS, but
that should be accomplished soon.
| 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 |