Operation Summary for December 14, 2009 - December 16, 2009

Monday Dec. 14
The day shift began with Operations monitoring the Tevatron (TeV) store 7437 (27.14E30) and the Recycler stash (351.8E10), with the Antiproton Source stacking (23.0E10), with the Linac, Booster, and Main Injector (MI) operating normally, with the NuMI, MiniBooNE, and the Meson MTest experiments taking beam, and with the Collider Detector at Fermilab (CDF) and D-Zero (D0) experiments using the colliding beams.

During the day shift, at 9:50 AM, NuMI personnel accessed their Absorber Hall to investigate a problem with an expansion tank skid. Operations terminated store 7437 at 9:55 AM and then put the TeV into HEP shot setup. NuMI personnel came out of access at 10:50 AM. Operations established store 7438 at 11:15 AM with an average initial luminosity (AIL) of 255.0E30.

During the evening shift, Operations reported that a Recycler kicker power supply (KPS2A) tripped off; EE Support personnel lowered the reservoir voltage to return the kicker to service. Operations disabled the MTest beam at 9 PM.

Tuesday Dec. 15
The midnight shift began with Operations monitoring store 7438 (59.99E30) and the stash (298.1E10), with Pbar stacking (16.0E10), and with NuMI and MiniBooNE taking beam.

During the midnight shift, the Booster East Anode Power Supply (EAPS) tripped off at 3:15 AM due to a transformer problem on a RF station (BRF2). Operators bypassed the station and brought BRF19 online. Operations called in Booster RF personnel to work on BRF2 and 8; they brought BRF8 online. Operations terminated store 7438 at 4:20 AM and then put the TeV into shot setup. Operations established store 7439 at 5:50 AM with an AIL of 249.0E30. Operations established beam to MTest at 6:20 AM.

During the day shift, TeV personnel conducted beam studies during the morning. Operations turned off a TeV RF station (TRF5) due to output gap envelope problems.

During the evening shift, TeV personnel began an end-of-store study at 7 PM. Operations terminated store 7439 at 10 PM. Operations brought TRF5 back online. Operations put the TeV into shot setup at 10:15 PM and established store 7440 at 11 PM with an AIL of 227.0E30. Operations disabled the MTest beam at 6 PM.

Wednesday Dec. 16
The midnight shift began with Operations monitoring store 7440 (190.79E30) and the stash (61.7E10), with Pbar stacking (20.1E10), and with NuMI and MiniBooNE taking beam.

During the midnight shift, at 12:25 AM, the Booster EAPS tripped off due to a BRF8 modulator problem. A Booster vertical trim magnet (B:VS4) current drifted, causing beam position problems. Operations restored the settings to the power supply’s control crate, which corrected the beam position. At 4:05 AM, the Booster EAPS tripped off due to a BRF1 water pressure sensor. Booster RF personnel came in and returned the station to service.

The Plans for Wednesday
The plans for today are to stack, stash, and store. The Run Coordinator will allow Pbar personnel to conduct aperture scans and RF personnel to repair BRF8, bring it back online, and then take BRF2 down for repairs.

Accelerator Update Archive

More Information
For Tevatron luminosity charts and the current status of Fermilab's accelerators and detectors (live!), please go to Fermilab Now.

Comments and Suggestions
What do you think about the Accelerator Updates? Please send comments and suggestions to: accelupdates@fnal.gov.