Minutes of the May 29, 2009 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=2598

* Weekly Operations Summary (C-Y Tan) - The Tevatron delivered 55 pb^-1 to the
experiments over the past 7 days.  There have been 9 HEP stores with initial
luminosities between 198 and 326 ub^-1/s.  Only 1 store was terminated
unintentionally - store 7091 ended after 2.5 hours when a failed abort link
repeater caused a spurious abort.  We had another lost shot during the squeeze;
a set of tripped sextupole magnets may have been a contributing factor.  There
is a dynamic aperture problem late in the squeeze that contributes to proton
loss; the coupling around D0 is rather sensitive to the beam angle through the
IP, so we have been adjusting the orbit to a better tracjectory.  After a
reboot, the 1.7 GHz VSAs were found to have an incorrect center frequency
setting that caused problems with the tune measurements.  The D0 low-beta QPMs
had a problematic card replaced.

* BBQ Status (Chip Edstrom) - The application can now handle 2 VSAs, so once 
a VSA returns from repair we'll have simultaneous proton and pbar tune
measurements.  The BBQ parameters are available on pages T55 <calc value>. Chip
added acl script calls into the sequencer to configure the BBQ automatically
for injection, ramp, squeeze, etc.  All seems to be working well.  Future
possibilities include bunch-by-bunch gating and remote control of BBQ
front-end gains and filter settings.

* Plan for Next Week

   - Only 2 weeks until the long shutdown...
   - Deliver luminosity
   - Lattice measurements for documentation (Alex et al., proton-only)
   - Chromaticity Tracker (Tan, proton-only)
   - Pinger test/coupling on ramp (Eliana, proton-only)
   - Pbar-only store (if pbars available, but not protons day before shutdown)