Accelerator Update for January 5, 2009 - January 7, 2009

Monday Jan 5

The day shift began with Operations monitoring the Tevatron (TeV) store 6704 (39.25E30) and the Recycler stash (244.3E10), with the Antiproton Source stacking (39.25E10), with the Linac, Booster, and Main Injector (MI) operating normally, with the Collider Detector at Fermilab (CDF) and D-Zero (D0) experiments using the colliding beams, and with the MiniBooNE and NuMI experiments taking beam.

Operations terminated store 6704 at 8:31 AM.

Operations put the TeV into shot setup at 8:42 AM.

Cryo system experts reported at 8:43 AM that they were tightening the belts on the TeV sector A3 wet engine.

CUB experts reported at 9:03 AM that they had reset a PLC for the TeV LCW system.

Operations established store 6705 at 10:25 AM with an initial luminosity of 271.1E30.

At 10:37 AM, a Linac Klystron RF station (KRF5) tripped off for the first of two times in four minutes. It reset.

At 11:59 AM, Operations reported that the P1 transfer line beam permit had tripped off twice due to a power supply (V714) trip. Everything reset.

A MI expert began tuning beam in the MI collimator area at 1:59 PM.

At 2:51 PM, the Tevatron Electron Lens (TEL) corrector magnet power supply tripped off on a quench indication. There was no quench. It reset.

Operations reported at 3:58 PM that the Recycler had stashed antiprotons seven times during the day shift.

At 8:13 PM, KRF5 tripped off. It reset.

At 11:08 PM, KRF3 tripped off. It reset.

Operations reported at midnight that the Recycler had stashed eight times during the evening shift.

Tuesday Jan 6

The midnight shift began with Operations monitoring store 6705 (64.99E30) and the stash (340.4E10), with Pbar stacking (20.8E10), and with NuMI and MiniBooNE taking beam.

At 12:22 AM, the Booster East Anode power supply tripped off along with its RF stations. Everything reset.

Operations terminated store 6705 at 2:43 AM.

Operations established store 6706 at 4:32 AM with an initial luminosity of 352.15E30.

Operations reported at 8:04 AM that the Recycler had stashed six times during the midnight shift.

At 9:26 AM, the Recycler suffered from a longitudinal emittance blowup. Operators investigated and found the horizontal system out of phase. Operations contacted experts.

Operations reported at 11:13 AM that Booster experts were tuning their accelerator.

The Neutron Therapy Facility reported at 11:14 AM that they had treated their last patient for the day.

At 11:15 AM, Linac techs began troubleshooting a quadrupole power supply (QPS122).

At 2:35 PM, KRF3 tripped off. It was reset, but then developed regulation problems due to problems with the cavity LCW system. A Linac expert investigated.

Operations reported at 4:04 PM that the Recycler had stashed five times during the day shift.

At 5:03 PM, KRF5 tripped off twice in an hour. It reset.

At 7:49 PM, LRF5 tripped off twice in two minutes. It reset.

Operations terminated store 6706 at 10:36 PM.

Operations put the TeV into shot setup at 10:50 PM.

Operations reported at midnight that the Recycler had stashed eight times during the evening shift.

Wednesday Jan 7

The midnight shift began with the TeV in shot setup, with Operations monitoring the stash (12.6E10), with Pbar stacking (54.9E10), and with NuMI and MiniBooNE taking beam.

Operations established store 6707 at 12:35 AM with an initial luminosity of 306.97E30. The luminosity was low due to the loss of antiprotons during the first two injections into the TeV.

At 2:01 AM, the Pelletron VME tripped off. Operations will contact experts later in the morning to get it reset.

At 3:04 AM, KRF5 tripped off. It reset.

Operations reported at 7:58 AM that the Recycler had stashed eight times during the midnight shift.

The Plans for Wednesday

The plans for today are to stack, stash, and store. The Run Coordinator will allow CDF and D0 an access after the store is terminated this afternoon. Cryo system experts will check all the TeV wet engine belts. After the next store is established, NuMI and MiniBooNE will access their areas.

Accelerator Update Archive

More Information
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