Wednesday April 4

The day shift began with Operations monitoring the Linac, Booster, and Main Injector (MI), and with the NuMI, MiniBooNE and, SeaQuest experiments taking beam.

During the day shift, at 9:58 AM, the NuMI beam permit tripped off on a MI incomplete RF gap, but no RF station had tripped; it reset. At 10:11 AM, the NuMI beam permit tripped off for the first of two times in 30 minutes due to a power supply’s (V118) output drifting low; everything reset. Operations established beam to the Meson FTBFT-992 experiment at 12:19 PM. Operations established beam to MTA. SeaQuest made two accesses during this shift.

During the evening shift, at 4:16 PM, the NuMI beam permit tripped off due to V118; everything reset. Operations disabled the MTA beam at 4:28 PM. Operations disabled the T-992 beam at 6:58 PM. SeaQuest made an access during this shift.

Thursday April 5

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

During the midnight shift, at 5:44 AM, the NuMI beam permit tripped off due to V118; everything reset.

During the day shift, Muon Ring personnel began a study around 8:50 AM. At 11:42 AM, the MiniBooNE beam permit tripped off due to an enclosure air flow indication (E:12AAIR) for the first of two times in about two hours; it reset. Operations established beam to T-992 at 12:11 PM. MI personnel began a slow spill study at 1:21 PM. Operations established beam to MTA around 2 PM. The MI slow spill study ended at 2:38 PM. The Muon Ring study ended at 3:57 PM. SeaQuest and T-992 made accesses during this shift.

During the evening shift, Operations disabled MTA beam at 4:33 PM. At 8:18 PM, Operations reported that the NuMI beam permit had tripped off twice due to V118; it reset. At 8:32 PM, the NuMI beam permit tripped off due to V118’s capacitor bank indication; Operators reported smelling something and called in Power Supply personnel. NuMI resumed taking beam at 10:08 PM; Power Supply technicians reported that they had replaced 10 capacitors and diodes in the V118 power supply. At 10:33 PM, the NuMI beam permit tripped off due to V118 drifting out of tolerance; it reset. T-992 made an access during this shift.

Friday April 6

The midnight shift began with Operations sending beam to NuMI, MiniBooNE, SeaQuest, and T-992.

During the midnight shift, Operations disabled T-992 beam at 1:24 AM. At 3:58 AM, the NuMI beam permit tripped off for the first of two times in three hours due to V118; it reset.

Operations Coordinator (OpsCo) Plans for Today and the Weekend

The OpsCo agrees with Booster, MI, and Muon Ring study plans for today.

Accelerator Update Archive

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