Minutes of the 6 Feb 2009 Tevatron Dept Meeting http://indico.fnal.gov/conferenceDisplay.py?confId=2381 * Weekly Operations Summary (Xiaolong Zhang) - The Tevatron has delivered nearly 115 pb^-1 to the experiments over the past *2* weeks. The monthly total for January 2009 was over 250 pb^-1, the second best month. There have been 17 stores with initial luminosities between 159 and 338 ub^-1/s. The Recycler had some problems that caused fewer available pbars for a couple of days. Only 1 store was lost prematurely: store 6772 ended with a quench at A3 after only 3.7 hrs. Recovery was quite long as additional pumps needed to be added to the cryo vacuum; there is a likely a cold leak near A34 that will need to addressed during the long shutdown. One shot was lost during the squeeze - it is similar to unexplained C2 quenches last month and another in June 2007; investigation continues. The D0 IP was adjusted per their request. "H-tables" were added to all arc dipole correctors to allow their use in smoothing the squeeze orbits in addition to the smaller subset used typically. We switched back to using TEL-1 to clean protons from the abort gap. Testing of automated injection closure and tune-up for HEP shot-setup continues. The jitter on the pbar injection kicker may be getting worse, so we are preparing to replace one of the HV pulsers. * Tevatron Integrated Luminosity Model (Alex Valishev) - Alex analyzed our current performance and how we might be able to improve. He studied longer stores/larger pbar stashes, smaller emittances, higher intensities. The gains in weekly integrated lumi could be only on the few-several % level - no 10-15% gains to be made. Increasing the beta* while trying to keep initial luminosities at a particular value only decreases the lumi integral. Performance changes in the injectors to achieve his scenarios are not taken into account. We should still explore some of the ideas, such as increasing proton intensity and reducing emittances (emittance preservation in chain.) * Automated Tuning in Shot Setup (Jerry Annala) - Jerry has been testing a program to automatically set tunes and chromaticities at 150 GeV during shot-setup. It relies on Tan's tune and chromaticity trackers. During testing, it only took ~5 min to complete. Sometimes the vertical tune tracker jumps to different synchrotron lines and complicates the procedure. Additional work is needed to integrate it into the sequencer for the MCR operators. * Plan for Next Week (All) - Integrate luminosity. - Investigate quench/tune-up squeeze (proton-only) - Bumper magnet as abort gap cleaner (Bruce, Elmie, Jim, proton-only) - Chromaticity tracker (Tan, proton-only) - HEP tune mult calibration (Ron, 2 hr end-of-store)