Minutes of the Sept 2, 2005 Tevatron Dept Meeting

1. Dept news: a) Congratulatiosn to Andreas with a newborn baby-girl!; b)
XiaoLong shared his impressions on Snowmass'05 where he participated in
transport line and DR WGs.

2. Ron on operations: 6 stores with lumi btw 91 (RR only store) to 127e30;
2 ended earlier because of feeder 46 and 47 glitches; lifetimes and losses
OK (e.g. 1.5% pbars in squeeze); beam vacuum is worsening in F-sector due
to P2 line leak.

3. Bruce tried to adjust MI energy to reduce phase oscillation at
injection in the Tev of some 0.5 (1) ns for protons(pbars) or 10(20) MeV -
as seen from Vic-Jerry's BLT. It worked but we'd better adjust Tev 150
GeV energy (to be tried today).

4. Tan used tune tracker in 36x0 store and saw no unusual losses on
the ramp; TT worked on ramp and in squeeze; there was a strange "slip" of
vertical tune at 980 - may be related to mysterious phase offset change.

5. Seva measured TEL-2 SC solenoid magnetic field line straightness with
Hall probe and with a magnetic arrow: the first method gave +-0.5mm
deviations, the arrow reported +-0.15mm (he believes the arrow). He
also reported status of SC solenoid warmup and new SEFT e-gun tests.

6. Alvin analysed Aug'05 IBS experiment data when 12 p-bunches with
different intensities and emittances were left alone for few hours at 980
GeV.  There is a clear linear dependence of emittance growth rates on the
IBS factor F=N/emm1/5sigma_s, though coefficients are 20-30% different
from what was found in a similar study in Dec'04 - Alvin attributes that
to FWs uncertainties and requested FWs coeeficients used in the front-end
calculations (like beta and D -functions in the FWs) to be datalogged.


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