Minutes of the 13 May 2011 Tevatron Dept Meeting

https://indico.fnal.gov/conferenceDisplay.py?confId=4450

* Weekly Operations Summary (Jerry Annala) - The Tevatron delivered 63.8 pb^-1
to the experiments over the past week.  There have been 8 HEP stores with
initial luminosities between 123 and 399 ub^-1/s. All of these stores were
teminated intentionally - in fact, we're on a nice streak of 25 consecutive
stores terminated intentionally. There was a computer network "storm" during
one shot-setup this week that caused some delay for things needing to be 
completed manually.  One of the collimator front-end crates was being flooded
with interrupt requests that caused delays in scraping for 3 stores; it has
since been fixed.  Thursday was an access day for maintenance during a 
ground fault hunt in the P1 transfer line.  There may be some small pbar
emittance growth soon after initating collisions; a minor tune change should
fix that.

* Study Period for Crystal Collimator & Hollow eBeam (Dean Still) - Over the
next 2 weeks, the T-980 folks (including visitors from CERN and INFN) will have
~30 hours of end-of-store studies to test crystals and their pixel detector -
five 6-hr long periods. They will also likely request trying to use 2-plane 
crystal collimation (instead of the normal tungsten primary collimators) for a
complete HEP store or 2.  In addition, there will be 2-3 end-of-store periods 
(3 hrs each) for hollow electron beam studies.

* Plan for Next Week (All)

   - Deliver luminosity.
   - Crystal Collimator (several end-of-store studies)
   - Hollow eBeam (1 or 2 end-of-store periods)
   - Lumi Leveling (Ron, middle of store)
   - Pbar longitudinal damper (Tan et al., proton-only)