Accelerator Update for February 4, 2008 - February 6, 2008

Monday February 4

The day shift began with Operations monitoring the Recycler stash (248.0E10), with the Antiproton Source stacking (28.4E10), with the Main Injector (MI), Linac, and Booster operating normally, with the Collider Detector at Fermilab (CDF) and D-Zero (D0) waiting for the next store, and with the NuMI and SciBooNE / MiniBooNE (BNB) experiments taking beam.

At 8:28 AM, a Linac Klystron RF station (KRF2) tripped off on a LCW flow fault. It reset.

At 8:31 AM, KRF1 tripped off on a LCW flow fault. It reset.

Operations reported that mechanical technicians were beginning work on the TeV sector F1 air compressor. When finished at F1 they will move on to F2 and then to F3.

At 9:08 AM, KRF3 tripped off. It reset.

Switchyard (SY) experts began tuning beam to the MTest area at 9:21 AM. This work was in preparation for a future MTest user.

Experts began ramping the TeV at 10:06 AM.

At 10:19 AM, Operations reported that a Booster kicker (MKS05) was sparking. Booster experts were there, bypassed the kicker, made repairs, and had the kicker back on within 20 minutes.

A Pbar expert reported at 10:20 AM that a Pbar Debuncher RF station (DRF1-4), which had tripped off on the last shift, was up and running.

Operations put the TeV through a dry squeeze at 10:21 AM.

At 10:35 AM, KRF4 tripped off. It reset.

At 10:42 AM, BRF14 tripped off. It reset.

At 10:59 AM, KRF2 tripped off. It reset.

At 11:05 AM, Operations reported that a TeV sector D47 vacuum pump had failed. A TeV expert closed the F4 valve (F4CV7U) to preserve the cryo system vacuum.

Operations put the TeV through a wet squeeze at 11:05 AM.

At 11:19 AM, the MI-10 LCW pump tripped off. It will be turned back on later.

At 11:21 AM, BRF5 tripped off for the first of four times in 15 minutes.

At 12:38 PM, KRF3 tripped off. It reset.

Operations established store 5885 at 2:13 PM with an initial luminosity of 231.07E30.

Operations reported at 2:43 PM that the NuMI sump work was finished.

A Pbar expert began a Pbar Debuncher study at 3:05 PM.

At 3:29 PM, BRF9 tripped off for the first of three times in about 30 minutes. It reset.

Operations reported at 4 PM that the Recycler had stashed antiprotons three times during the day shift.

At 4:08 PM, a Booster vacuum pump tripped off and caused BRF13 & 14 to trip. Everything reset.

At 4:38 PM, BRF9 tripped off for the first of two times in 45 minutes. It reset.

At 4:42 PM, BRF14 tripped off. It reset.

Operations shut off the SY/MTest beam at 5:56 PM. The experts were finished using the beam.

The Pbar studies ended at 6:17 PM.

At 9:06 PM, BRF10 tripped off. It reset.

Operations reported at 11:51 PM that the Recycler had stashed four times during the evening shift.

Tuesday February 5

The midnight shift began with Operations monitoring the store 5885 (82.17E30) and stash (179.1E10), with Pbar stacking (37.0E10), and with NuMI and BNB taking beam.

At 12:37 AM, a NuMI vacuum valve (E:BV100) closed. Beam resumed a few minutes later.

At 1:23 AM, KRF3 tripped off. It reset.

At 1:47 AM, KRF7 tripped off. It reset.

At 1:49 AM, Operators discovered that the Pbar Accumulator injection shutter had tripped. It reset.

At 5:18 AM, BRF9 tripped off for the first of two times in two hours. It reset.

At 6:19 AM, a MI vacuum pump tripped and caused the MIRF system to trip, which in turn caused the NuMI beam permit to trip. This happened twice in a short period of time. It was 6:44 AM by the time operators got everything reset and Operations resumed sending beam to Pbar and NuMI.

Operations reported at 7:59 AM that the Recycler had stashed five times during the midnight shift.

SY and MTest experts began taking beam for tuning at 8:52 AM.

At 9:55 AM, BRF9 tripped off for the first of two times in about an hour. It reset.

At 10:21 AM, KRF3 tripped off. It reset.

Operations terminated store 5885 at 11:02 AM.

Operations prepared D0 for an access at 11:15 AM.

At 11:20 AM, BRF15 tripped off for the first of five times in 26 minutes. It reset.

At 12:25 PM, KRF2 tripped off. It reset.

D0 came out of access at 12:27 PM.

Operations put the TeV through a dry squeeze at 12:49 PM.

Operations disabled the NuMI beam at 1:11 PM for a scheduled access later in the day.

Also at 1:11 PM, Operations put the TeV into shot setup.

At 1:35 PM, KRF4 tripped off. It reset.

Operations reported at 2:35 PM that Preaccelerator experts were repairing the I- Source, which was the back up source. This work took about 20 minutes.

Operations turned off MI at 3 PM in preparation for a scheduled access to repair a vacuum leak.

Operations established store 5887 at 3:16 PM with an initial luminosity of 241.13E30.

Operations reported at 4 PM that the Recycler had stashed two times during the day shift.

A Linac expert completed a LRF1 study at 4:29 PM.

The vacuum techs came out of MI at 5:52 PM.

NuMI experts came out of access at 6:22 PM.

Operations established beam to BNB at 6:41 PM.

At 7:05 PM, Operations reported that a Pbar power supply (HV100) would not turn on. Operators contacted an expert.

Operations established beam to NuMI at 7:07 PM.

At 8:01 PM, BRF1 and BRF10 tripped off for the first of two times in about 47 minutes. They reset.

A Pbar power supply expert reported at 8:50 PM that HV100 was up and running. Pbar resumed stacking.

At 9:08 PM, BRF10 tripped off for the first of five times in about an hour. It reset.

At 9:11 PM, LRF2 tripped off. It reset.

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

Wednesday February 6

The midnight shift began with Operations monitoring the store 5887 (94.38E30) and stash (103.5E10), with Pbar stacking (9.1E10), and with NuMI and BNB taking beam.

At 12:37 AM, BRF10 tripped off. It reset.

At 2:05 AM, KRF7 tripped off. It reset.

At 5:36 AM, BRF9 tripped off. It reset.

At 6:21 AM, LRF5 tripped off. It reset.

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

The Plans for Wednesday

The plans for today are to stack, stash, and store. The Run Coordinator will allow experts from Booster, Pbar, Recycler, and the TeV to conduct studies.

Accelerator Update Archive

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