Minutes of the 9/18/09 Tevatron Dept Meeting http://indico.fnal.gov/conferenceDisplay.py?confId=2795 * News (Ron) - Nice job by everyone during post-shutdown commissioning! * Startup Progress (Jerry Annala) - The Tevatron had its first pulse of post-shutdown beam last Friday night, and we put in the first HEP store 4 days later. The first 2 stores had initial luminosities of 63 and 134 ub^-1/s and were terminated intentionally. Beam intensities are intentionally low as the other machines tune-up as well. Lingering issues: BPMs (4 houses in particular) seem to hang-up after injecting beam, none provide the injection frame for closure; new vacuum leak in A3 is holding; a few power leads are running warm; the usual minor ground faults (HTS spool leads and lower buss in F-sectors) persist; the A18-1 quad (and a couple other nearby magnets) should be lowered ~1 mm to reduce dipole corrector currents. The IP positions have been adjusted to the satisfaction of CDF and D0. Collimators have been aligned. The PBJ was found to cause a growth rate that is only 10% of nominal; amplifier is OK, likely a phase change. * Machine Optics after the Shutdown (Alex Valishev) - The injection and collision lattice is nearly unchanged from pre-shutdown measurements; the IPs are fine: beta* = 28 cm, dispersion at D0 could be reduced, but it's not significant. Meausurement of the collision helix shows some misalignment of several microns in each plane at each IP. The A17 vert separator may be not putting out proper voltage? Alex will develop corrections for the helix. * Plan for Next Week - There a few items to check and tweak: tunes and orbit angle across IPs during the squeeze, tune on ramp. Watch for IP drift during stores. Get the BPMs fixed. - Deliver luminosity while increasing beam intensities as the injectors and our beam losses allow. - Studies for TEL-2, IPM, HEP tune mult calibration. - MI/P1/Tev lattice measurements to check for matching problems as we did prior to the shutdown. (Once our BPMs are fixed.)