Minutes of the March 18, 2011 Tevatron Dept Meeting

https://indico.fnal.gov/conferenceDisplay.py?confId=4231

* Records Management (Debbie/Traci/Rebecca) - There will be an internal
assessment of progress implementing our records management policy. They are
available to help us categorize our records to assign the appropiate retention
schedule.

* Weekly Operations Summary (Bruce Hanna) - Since returning to operations after
last week's shutdown, the Tevatron has delivered 52 pb^-1 to CDF and D0. There
have been 9 HEP stores with initial luminosities between 155 and 367 ub^-1/s.
Only the first store was lost prematurely due to a quench at pbar collimator
locations; it is clear the beam must moved toward those collimators, but no
definite cause has been found. Start-up was complicated by problems with the
C4 BPMs; a cable swap after board replacement was eventually fixed.  The D1
cryo cold compressor (installed last week) can not achieve the desired 2-phase
pressure; vacuum readings in the tunnel seem OK, so investigation continue. 
Not surprisingly, one of the pbar abort kickers that had extensive maintenance
pre-fired during a tune-up store. ES&H and the fire department contained an
oil leak from a cryo compressor. RF experts reduced the 311 MHz harmonic in
TRF1 which has eliminated one signature of a proton instability. Longitudinal
pbar instabilities continue, but we are waiting for study time to commission
the pbar longitudinal damper.  Other instrumentation maintenance and tune-ups
have been completed.

* Discussion on Next Week's Plans

   - Deliver luminosity.
   - Work on records management.
   - HEP Tune Mult Calibration (Ron, EOS)
   - Pbar Longitudinal Damper (Tan, proton-only)
   - Hollow e-beam (Giulio and Alex, EOS)
   - Lumi vs Bunch Length (Ron, EOS)
   - eCloud (Xiaolong, proton-only)