Minutes of the May 30, 2008 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=1838

* News (Ron) - Although the rolling furloughs have ended, we still must use up
our vacation allotment - please schedule any extended vacations with me and use
the vacation calendar to note days away.

* Weekly Operations Summary (C-Y Tan) - The Tevatron delivered 45.5 pb^-1 to
CDF and D0 over the past 7 days.  May is not quite over, but we have already
smashed the previous record of integrated luminosity in a calendar month by
delivering 210 pb^-1 so far (previous best = 167 pb^-1 in Jan 07).  There have
been 9 HEP stores with initial luminosities between 190 and 286 ub^-1/s.  Store
6154 was aborted after 21.5 hr due to a problem with the D2 power supply.  Two
failed shots were lost during the squeeze - shot 6161 quenched from high
pbar losses during the helix transition because the pbars were much larger than
usual as a result of Recycler damper problems.  Shot 6167 also quenched on
beam losses during the squeeze helix transition - both tunes were a bit too
high at the time.  Cryo work included: F3 wet engine overhaul, A3 wet engine
flywheel replacement, C4 cold compressor adjustment.  TRF2 tripped off during
store 6159 and TRF7 tripped off during 6165.  A flaky connection was fixed
after the B48V separator had problems switching polarity during shot-setup
tune-up.

* Changes to Pbar Injection Cogging (Ron) - Based on Fedor's observations of
RFSUM and proton bunch length during pbar injections, the initial pbar cog
was moved from after protons were loaded to just after the Tevatron reaches
the 150 GeV injection porch (no beam).  It should also be possible to adjust
the injection cogging by 0.04 bucket to allow an integer bucket cog for
acceleration and collisions.  This could lessen any negative effect from
cavity phasing errors during cogging.

* Plan for Next Week

   - Deliver luminosity.
   - Low-beta lattice measurments (Alex, proton-only)
   - P1 line matching (Alex, Jerry, Andreas, proton-only)
   - Chromaticity Tracker (Tan, proton-only)
   - Use VPB11 to look at bunch-by-bunch orbit differences (Alex, Seva, during HEP)