Minutes of the November 13, 2009 Tevatron Department Meeting http://indico.fnal.gov/conferenceDisplay.py?confId=2904 * Weekly Operations Summary (Dean Still) – The Tevatron delivered 47.7 pb-1 this week in 10 stores ranging in Luminosity from 135 to 272cm-2 sec-1. There was on quench during the low beta squeeze, and one store was ended when AAK2 pre-fired. Preliminary analysis showed the 9 bunch es were effected by the pre-fire, and at least 5 were absorbed the the A48 collimator. RF stations 6 and 7 were adjusted to shift some higher order modes. Initial evidence is that this did help with the longitudinal blow ups that we have seen in the Pbars. * D0 Losses and recent shielding additions (Bill Lee) - During the summer shutdown, some shielding blocks were added to the C4 side of the IP to try to help shield the inside and lower sections of the muon chambers at D0 from large angle losses. Bill Lee has had the muon HV raised from 50% to 70% during the squeeze to allow for measurements of how effective the shielding is. The ratio of the Muon current to the BLMs (which measure losses at low amplitues) show no changes since the shielding was added indicating that there is no improvement from the shielding. The loss of power supplies does seem to be less frequent, but there are limited statistics, and the current set of power supplies is newer after the shutdown. The newer power supplies always seem to be a little more robust. * Report on Trip to Cern (Dean Still) - Dean participated in the recent UA9 run in the SPS which was meant to determine channeling efficiency in a circular accelerator. Many of the same phenomenon seen in the Tevatron were also observed in the SPS. One conclusion of the UA9 experiment was that there was no leakage of particles from the channel. Dean was very impressed with the images of halo and channeled beam that could be seen with the Medipix detector. He stated that this would be an extremely valuable diagnostic to have for the Tevatron. Dean also sat in on a couple shifts of LHC commissioning. They were working on correction element polarity checks with single pass beam. Commissioners were proceeding very cautiously but they did plan to have some collisions running by the end of the year. * Plan for next week - Deliver Luminosity - Reduce Emittance growth during the collider fill process - TEL 2 BPM studies - Tune mult calibrations - Optics Measurements at Low Beta