Monday April 2

The day shift began with Operations monitoring the Linac, Booster, and Main Injector (MI), and with the NuMI, MiniBooNE, SeaQuest experiments, and the FTBF T-992 experiment taking beam.

During the day shift, at 8:23 AM, Operations disabled beam to T-992. At 8:49 AM, the NuMI beam permit tripped off for the first of two times in about three hours due to a power supply’s (E:V118) output drifting low; everything reset. A Switchyard (SY) person began a SeaQuest intensity study at 9:40 AM. Operations established beam to T-992 at 10:41 AM. A Muon Ring person began a study at 10:44 AM. The MiniBooNE beam permit tripped off at 11:19 AM due to bad beam positions; it reset. Operations turned off all SY beam at 12:56 PM to allow a power supply person to work on a critical device. MI personnel began study at 1:04 PM. Operators prepared the Neutrino Area for access at 1:06 PM. The MI studies ended at 2:23 PM.

During the evening shift, the Muon Ring study ended at 4:30 PM. Operations reported a problem with a Meson power supply (F:MW1W); Operators investigated and replaced a control card. At 7:40 PM, the NuMI beam permit tripped off due to V118; everything reset.

Tuesday April 3

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

During the midnight shift, at 2:41 AM, the NuMI beam permit tripped off due to V118; everything reset. Operations disabled the T-992 beam at 3:08 AM.

During the day shift, at 9:03 AM, Linac personnel began the switch from the H- Source to the I- Source. Operations completed a Booster injection tune at 10:07 AM. A Booster person began a multibatch study at 10:42 AM. Operations established beam to T-992 at 11:23 AM. The Neutrino Area NS2 LCW system alarmed on a high surge tank level at 11:49 AM; a Water Group person investigated. At 12:04 PM, the MiniBooNE beam permit tripped off for the first of two times in 37 minutes due to bad beam positions; it reset. Muon Ring personnel began a study at 12:26 PM. At 12:41 PM, two Linac RF stations (LRF1 and LRF5) tripped off along with many quadrupole magnet power supplies; Linac personnel responded, brought up everything but LRF1, and reported the trips were all due to an I- Source spark. Linac resumed sending beam at 12:46 PM. A MI person began a g-2 (g minus 2) study at 1:04 PM. The NuMI beam permit tripped off at 2:01 PM due to V118; everything reset.

During the evening shift, the Muon Ring study ended at 4:28 PM. The g-2 study ended at 4:54 PM. Operations disabled T-992 beam at 8:40 PM. T-992 and SeaQuest made accesses during this shift.

Wednesday April 4

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

During the midnight shift, at midnight the I- Source tripped off; it recovered. The NuMI beam permit tripped off at 12:41 AM for the first of two times in six hours due to V118; everything reset. At 3:17 AM, a Linac Klystron RF station (KRF4) wandered out of phase due to a cooling problem; Operators had the station back online by 3:39 AM.

Operations Coordinator (OpsCo) Plans for Today

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

Accelerator Update Archive

More Information
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