NuMI reported receiving 7.84E18 protons on target for the period from 3/5/12 to 3/12/12.

Friday March 9

The day shift began with the Booster off for an access to investigate a sump pump high-level alarm, with Operations monitoring the Linac and Main Injector (MI), and with the NuMI and MiniBooNE experiments off do to the Booster access.

During the day shift, at 8 AM, Neutron Therapy Facility (NTF) personnel prepared to treat one patient later in the morning. Also at 8 AM, a Booster RF technician took a look at an RF station (BRF2). The Booster came out of access, reported it was a stuck float, and resumed sending beam by 8:34 AM. Operations began sending beam to the Neutrino Area SeaQuest experiment E-906 around 8:45 AM. A Booster person began an aperture scan study at 8:50 AM. At 9:34 AM, the MiniBooNE beam permit tripped off due to bad beam positions; it reset. Operations established beam to the Meson FTBF experiment T-1008 at 10:21 AM. At 1:01 PM, Operation halted the Linac beam to allow techs to work on a RF station (LRF3). Operators loaded an energy conservation time line into the Time Line Generator (TLG) at 1:08 PM. Linac techs completed their work on LRF3 and Linac resumed sending beam at 1:38 PM. At 2:48 PM, a NuMI kicker (I:KPS6N) tripped off; a Kicker person investigated and reported that a cable needed to be reterminated. Operators loaded an energy conservation time line at 3:25 PM. Operators prepared the Neutrino Area enclosures NM3 and NM4 for an access at 3:29 PM. Work on I:KPS6N ended and MI resumed sending beam at 3:55 PM.

During the evening shift, a NuMI person reported at 4:48 PM that while NuMI was down due to a their kicker problem the MI-62 LCW system lost about 100 gallons of water, but when they resumed taking beam, the leak went away; Operators created an alarm to track this problem. NuMI resumed taking beam at 5:06 PM. The Booster studies ended at 5:19 PM. At 6:45 PM, Operators reported that they had completed an MI tune, injection closure, and made phase and energy changes. Operations reported at 10:16 PM that they were still struggling with MI beam position problems.

Saturday March 10

The midnight shift began with Operations sending beam to NuMI, MiniBooNE, SeaQuest, and T-1008.

During the midnight shift, Operations disabled beam to T-1008 at 1:09 AM. Operators loaded protons into the Recycler at 3:40 AM. Operations established beam to T-1008 at 7:41 AM.

During the day shift, at 9:01 AM, the MiniBooNE beam permit tripped off for the first of five times in six hours due to bad beam positions; it reset.

During the evening shift, at 9:23 PM, LRF3 tripped off and would not reset; Operations called in Linac personnel. Operators loaded an energy conservation time line at 9:39 PM. Linac resumed sending beam at 10:12 PM.

Sunday March 11

The midnight shift began with Operations sending beam to NuMI, MiniBooNE, SeaQuest, and T-1008.

During the midnight shift, at 6:34 AM, LRF4 tripped off and would not reset; Operations called in Linac personnel.

During the day shift, Linac personnel replaced a fuse for LRF4 and Linac resumed sending beam around 9:15 AM. Operations reported at 9:40 AM that while the Linac beam was off, NuMI cooled down and its LCW leak returned; the leak stopped when NuMI resumed taking beam.

During the evening shift, at 4:43 PM, Operations reported problems with Booster RF sparking; investigations revealed that BRF19 was the cause; Operators made adjustments. Operations completed a Linac and Booster tune 8:09 PM. Operators loaded protons into Recycler at 9:21 PM. Operations received a call at 10:51 PM from the Cryo System Coordinator about the MTA cryo system; Operators investigated and found the +5 volts missing from an IO crate. The Cryo Coordinator called in a tech who had the problem repaired by 11:45 PM.

Monday March 12

The midnight shift began with Operations sending beam to NuMI, MiniBooNE, SeaQuest, and T-1008.

During the midnight shift, Operations completed a 750 KeV line tune by at 12:06 AM. Operations completed a Booster injection tune by 12:52 AM. At 6:05 AM, the H- Source tripped off; it reset.

Operations Coordinator (OpsCo) Plans for Today

The OpsCo agrees with the plans of MI personnel to conduct a g-2 (g minus 2) study. NuMI personnel would like to access MI-62 to search for a possible LCW leak when an opportunity arises. SeaQuest would also like to make an access into NM4 when an opportunity arises.

Accelerator Update Archive

More Information
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