Minutes of the July 9, 2010 Tevatron Dept Meeting

http://indico.fnal.gov/conferenceDisplay.py?confId=3477

* Weekly Operations Summary (Jerry Annala) - 9 HEP stores and a 3X3 store used
for BBC studies that occurred during the week.  The Luminosities of the HEP 
stores ranged from 230 to 328 E30 with a total integrated Luminosity for the 
week of 59.2 pb-1.  All stores were ended intentionally and the biggest problem
was increasing losses in the squeeze.  There is some evidence that quads near 
D0 are rolling again, so a parse has been requested to tune up the squeeze 
before the weekend.

* Recent TEL-2 studies results (Alex Valishev) - Two TEL studies were conducted
this week.  A lack of Pbars provided an opportunity to investigate Transverse 
Mode Coupling Instability (TMCI) that was possibly observed on Jan 29 during a 
4X0 store.  This time the study was conducted at 150 GeV using a collimator to 
protect the cryogenic magnets.  The instability could be generated and the 
dependence of important parameters such as tune split, electron beam current 
and solenoid field were investigated.  There was reasonable agreement with the
theory found during this study.  The study was determined to be safe, and quick
to set up and conduct.  Introducing coupling to the Tevatron stabilized the 
instability and this was not predicted by the theory.

A 3X3 store was also conducted this week.  The ultimate goal of Beam-Beam 
compensation was not achieved, but the tune scans did provide a good case for 
comparison to simulations.  Also, there may be some evidence that there was a 
reduction in the resonance strengths of some of the resonance lines that were 
crossed.

* Plan for Next Week

  - Maximize integrated luminosity
  - Parse the squeeze to reduce losses
  - EOS study to check abort gap cleaning of TEL-2
  - Make sure that the separators are set for head on collisions
  - Collect any additional documentation needed before the shutdown.