Minutes of the Sep 23, 2005 Tevatron Dept Meeting

1. News: a) Vladimir brought a cake to thank the Department for exciting 4
years of Run II; he is out of the lab next week, starting Oct 1st Ron
Moore will officially take over the Department; b) everybody should
report efforts for the week of Sep 19 - ask Eva if you need help!

2. Ron on operations: 6 stores with initial Lumi btw 90 to 119e30, one
ended by quench due to cryo controls problem; had 3 stores with new
28 cm beta* optics (see below); 25% of protons lost in #4397 at 150 GeV due
to incorrect tune settings (low Qv).

3. Sasha reported that beta* reduction led to about 10% luminosity
increase in CDF and close to 15% in D0 (more stores needed to get better
statistics); losses tolerable, lifetimes acceptable, CDF waist z-position
still needs to be moved by 5 cm; tunes may need adjustments - recent one
led to scallops (emittance blowup after initiate collisisons) in #4399.

4. Tan analysed performance of his Tune Tracker which was used in 6 recent
stores and showed that at 150 GeV it may lock to +-1 synchrotron lines;
there is some uncertainty at the end of the ramp due to Schottky signal
saturation (smth we live with for year(s)); TT consistently shows very low
Qv=0.570 at 980 and in first steps in squeeze - smth we probably should
pay attention to.

5. Vahid has turned ON his slow orbit stabilization application at the end
of a store and it succesfully worked - kept orbits withing +-40 microns (HF
jitter only); it is ON also in the present store #4399 (works great so
far).


Minutes recorded by V. Shiltsev; edited by R. Moore