In the schedule below, Day 0 is 29 January, the day after the Maintenance Day to switch over the Q7 and sextupoles.
Day Activity 0 Test ramp, snakes and rotators to operating current (Maintenance Day(s)) 1-2 Establish AGS extraction/RHIC injection (Nick) AGS to RHIC synchro (RF group) Injection kicker timing (Wolfram) Check injection damper (Rob) Turn on snakes (Waldo, Mei) Adjust bend trim (Vadim) Check snake bumps, establish Golden Orbit (Vadim, Waldo) Establish RF capture (RF group) Setup WCM, BPMs, IPM, BBQ, Artus, Polarimeter (Roger L., Todd, Roger C., Al, Angelika, Mike) Correct orbits, tunes, chromaticity and coupling Check spin pattern 3-5 Snake current scan at injection (Mei) Ramp development (no rotators yet), using tune feedback Check separation bumps 6-7 Rotator ramp development (using tune feedback) Optics correction in blue, at near-integer store working point (Todd, Mei) Collision setup 8-14 Setup collimation (Angelika) Overnight stores Increase number of bunches and bunch intensity Fine-tune the ramp to maximize polarization IR nonlinear corrections (Fulvia) Nonlinear chromaticity correction (Yun) 15- Physics Development during Day shifts
The following update on the status of preparations for polarized proton running was contained in an email from Chris Montag dated 27 Sept 2007.
Dear colleagues, As discussed at the retreat, we will run the "Blue" RHIC ring at a new, near-integer working point (.96/.95), while the "Yellow" ring remains at the current polarized protons tunes (.695/.685). As part of the preparations for this running mode, we have to make sure that all RHIC systems that rely on tune measurements, use the tune setpoint, or rely on the tune or the betatron phase advance over a large portion (> one arc) of the ring are capable of dealing with the new working point. As a starter, I have attached a list of systems that need to be checked and probably updated. This list is not necessarily complete, so I would like to ask everybody to take a careful look at this list and let me know if I missed something. I also would like to ask the listed contact persons for each system on the list to let me know of the status of their respective systems. With best regards and many thanks, Christoph -- System Contact Comments Artus A. Drees separate peak finder windows; zooms should not reset after each measurement Chromaticity Control S. Tepikian chromaticity sign; tune peakfinder (?) Damper (injection) A. Drees check betatron phase advances for new tunes Decoupling J. Beebe-Wang tune peakfinder GapCleaner A. Drees different tunes in both rings InjectionTuning W. Fischer decoupling? IPM S. Tepikian beta-functions still correct? Orbit V. Ptitsyn get tunes separately for both rings PLL Tunemeter/BBQ P. Cameron different search windows in both rings RampEditor/Model N. Malitsky robust tune setting near the integer RhicBTF P. Cameron betatron phase advance SkewQuadModulation Y. Luo betatron phases/tunes
Scheduling Physicist: Mike Sivertz | Last updated: |
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