RHIC pp Set-Up: JET had an access to fix a water circulator issue. Operational by 4PM. During the JET access we found Yellow CNI bias voltage at 15 volts instead of 90. Raising the voltage to 90 increased the measured polarization from 30 to 50%. Today we need to understand what is needed to fix the Breit-Rabi Polarimeter for the JET. The JET also requires a pump replacement and an ion gauge replacement. These items will require an access of ~8 hours. During the first good store after the access yesterday, we took a minimum LOTO access to repair a Booster RF cavity.
We ran a 1.1E11 56x56 bunch store last night, with vertical polarization for PHENIX. They have now finished calibrating there polarization detectors, and are ready to go to Radial Polarization,.
Both experiments report good background rates at these operating conditions.
Calculated emittances from ZDC rates are >30pi. IPMs show only 20pi. Today we need to understand the emittances, perform rotator ramp development and collision tuning.
| 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 |