Monday June 21
The day shift began with Operations monitoring store 3586 and the Recycler stash, with the Antiproton Source (Pbar) stacking, and with MiniBooNE taking beam.
At 9:54 AM, MiniBooNE made the first of what would become many accesses for a special study.
A Main Injector (MI) expert began a one-hour MECAR study at 10:16 AM.
Booster experts investigated the regulation problem with a power supply (B:SEXL4). They reported that the repair wouldn't be easy. The supply was left off.
Operations reestablished beam to MiniBooNE at 12:18 PM and to the Meson MTest experiment at 1:11 PM.
Tevatron (TeV) experts reported at 1:34 PM that they had made changes to the collimator movement sequencer.
At 2:02 PM, the Collider Detector at Fermilab (CDF) and D-Zero (D0) both reported a collider beam problem. Experts thought at first it was due to a separator spark, but later discovered it was due to a heavy truck driving by CDF on the Ring Road.
At 4:32 PM, Recycler experts began an instability study. This study required there to be no ramp or beam in MI.
The Recycler study finished and Pbar resumed stacking about 5:50 PM.
Operations established beam to Meson MCenter experiment at 8 PM
A Pbar expert began a stacking study at 10:15 PM. This interrupted stacking and also halted all Switchyard beam.
Pbar resumed stacking at 11:37 PM.
Tuesday June 22
The midnight shift began with Operations monitoring store 3586, with Pbar stacking, MiniBooNE, MTest, and MCenter taking beam.
At 5:16 AM, A Booster RF station (BRF1) tripped off and wouldn't reset. Operators bypassed the station and called in an expert who determined at 6:09 AM that the repair would require an access. The Run Coordinator determined that this repair would be made later.
Operations terminated store 3586 at 8:16 AM and put the TeV into shot setup at 9:11 AM.
Operations established store 3588 at 11:36 AM with an initial luminosity of 84.78E30. This set A NEW LUMINOSITY RECORD. Pbar resumed stacking.
Operations reestablished beam to MTest at 12:05 PM.
Wednesday June 23
The midnight shift began with Operations monitoring store 3688 and the stash, with Pbar stacking, and with MiniBooNE and MTest taking beam.
At 1:35 AM, Operations reported that a Recycler corrector power supply (R:CE401) tripped off. Eventually this caused the loss of the stash.
Plans for Today
The plans for today are to terminate the store at 5 PM and then allow a study period.
Accelerator Update Archive
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