Accelerator Update for January 14, 2008 - January 16, 2008

Monday January 14

The day shift began with Operations monitoring the Tevatron (TeV) store 5842 (44.2E30) and the Recycler stash (401.7E10), with the Antiproton Source stacking (11.3E10), with the Main Injector (MI), Linac, and Booster operating normally, with the Collider Detector at Fermilab (CDF) and D-Zero (D0) experiments using the colliding beams, and with the NuMI and SciBooNE / MiniBooNE (BNB) experiments taking beam.

Operations terminated store 5842 at 8:34 AM.

Operations put the TeV into shot setup at 8:47 AM.

At 8:57 AM, Operations reported the H- Source output was decreasing. Operators notified Preaccelerator experts.

At 11:08 AM, the TeV suffered a quench. Experts investigated.

Operations prepared D0 for a collision hall access at 11:20 AM.

Operations prepared CDF for a collision hall access at 11:40 AM.

Operations reported at 1:48 PM that the H- Source output was back to normal.

D0 and CDF came out of access around 2:24 PM. TeV experts began a study.

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

Operations put the TeV through a dry squeeze at 4:34 PM.

At 4:35 PM, a Linac RF station (LRF2) tripped off. It reset.

At 5:25 PM, a Linac Klystron RF station (KRF1) tripped off due to an LCW flow fault. It reset.

At 5:48 PM, KRF1 & 2 tripped off due to an LCW flow fault. They reset.

At 5:55 PM, KRF2 tripped off due to an LCW flow fault for the first of three times in 13 minutes. It reset.

At 6:15 PM, KRF3 tripped off due to an LCW flow fault. It reset.

At 8:33 PM, Operations reported that the H- Source output was dropping again.

Operations put the TeV through a wet squeeze at 11:49 PM.

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

Tuesday January 15

The midnight shift began with Operations monitoring the stash (252.3E10), with Pbar stacking (17.4E10), and with NuMI and BNB taking beam.

Operations put the TeV into shot setup at 12:45 AM.

Operations established store 5846 at 3:17 AM with an initial luminosity of 193.81E30.

At 5:35 AM, the West Anode Power Supply (WAPS) tripped off. It reset.

Operations reported at 8 AM that the Recycler had stashed four times during the midnight shift.

At 8:54 AM, Operations reported that MIRF18 was tripping off. It reset.

At 10:01 AM, Operations reported that KRF6 had tripped off. It reset.

At 10:54 AM, BRF8 tripped off. It reset.

At 11:29 AM, the Pelletron tripped off. Operators contacted an expert.

At 11:38 AM, KRF2 tripped off. It reset.

At 11:45 AM, the 400MeV area beam permit tripped off for the first of two times in 25 minutes due to bad beam positions. It reset.

At 1:01 PM, KRF4 tripped off. It reset.

Operations reported at 4 PM that the Recycler had stashed five times during the evening shift.

At 4:33 PM, KRF4 & 6 tripped off. They reset.

At 5:20 PM, LRF2 tripped off. It reset.

At 5:40 PM, BRF9 & 16 tripped off. They reset.

At 5:50 PM, BRF10 tripped off. It reset.

Operations terminated store 5846 at 7 PM.

Operations prepared CDF and D0 for access at 7:09 PM.

CDF came out of access at 7:40 PM.

At 7:46 PM, BRF1 tripped off for the first of two times in four minutes. It reset.

D0 came out of access at 8:15 PM.

At 8:33 PM, the Pelletron tripped off. Operators contacted an expert and then turned the electron cooling back on. The expert came in to investigate.

Operations put the TeV through a dry squeeze at 8:36 PM.

At 8:43 PM, KRF3 & 4 tripped off. KRF3 reset, but KRF4 would not. Operators called in a Linac expert and talked with various other experts.

Operations reported that a Linac VME expert found bad VME code. He loaded the right code and Operators had the station up and running by 11:30 PM.

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

Wednesday January 16

The midnight shift began with the TeV in a wet squeeze, with Operations monitoring the stash (327.5E10), with Pbar stacking (52.0E10), and with NuMI and BNB taking beam.

At 12:21 AM, BRF10 tripped off. It reset.

At 12:38 AM, KRF6 and the 400 MeV area tripped off. They reset.

At 1:28 AM, the Run Coordinator reported that he had granted D0 an access to repair a PDT power supply failure. They cannot take viable data without this power supply.

Operations prepared D0 for an access at 1:42 AM.

At 2:02 AM, D0 cancelled their access; they discovered that the power supply was on, but it had a bad read back.

Operations put the TeV through a dry squeeze at 2:44 AM.

Operations put the TeV into shot setup at 3:06 AM.

At 4:13 AM, BRF9 tripped off. It reset.

At 4:32 BRF14 tripped off. It reset.

At 5 AM, BRF9 tripped off. It reset.

Operations established store 5850 at 5:06 AM with an initial luminosity of 262.69E30.

At 5:57 AM, BRF14 tripped off. It reset.

At 6:26 AM, BRF7 & 8 tripped off. They reset.

At 6:27 AM, the Booster WAPS tripped off. It reset.

At 7:04 AM, KRF7 tripped off. It reset.

Operations reported at 8 AM that the Recycler had stashed three times during the midnight shift.

The Plan for Wednesday

The plan for today is to stack, stash, and store. The Run Coordinator will allow Booster and MI experts to conduct studies.

Accelerator Update Archive

More Information
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