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| Operation Summary for December 12, 2011 - December 14, 2011 |
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Monday December 12 The day shift began with Operations monitoring the Linac, Booster, and Main Injector (MI), and with the NuMI and MiniBooNE experiments taking beam. During the day shift, Operators reported that the Neutron Therapy Facility 58˚ power supply had developed an LCW leak; a Power Supply person began repairs at 8:43 AM and completed them about an hour later. Booster personnel began aperture scans at 9:25 AM. Power supply personnel began work on a MiniBooNE power supply (E:HV860) LCW leak at 9:33 AM; this halted MiniBooNE beam. At 9:44 AM, operators reported output problems with a Linac quadrupole magnet power supply (L:QPS107); Linac technicians investigated, switched out some control cards, and had the supply back on line by 10:10 AM. The Booster aperture scans ended at 10:46 AM. Linac personnel began wire study at 10:46 AM. The Power Supply person working on E:HV860 reported that they could not braze the leak today; since the LCW leak was slow and not a safety risk, the power supply personnel reported that they would complete their repair on Tuesday, 12/13/11. They brought the power supply back on line at 10:47 AM. Operations established beam to Meson FTBF experiment T-1015 at 11:06 AM. During the evening shift, at 4:44 PM, a Booster RF station (BRF11) tripped off on a ground fault indication for the first of seven times in about six hours; it reset. Operations disabled T-1015 beam at 10:17 PM. Tuesday December 13 The midnight shift began with Operations sending beam to the NuMI and MiniBooNE. During the midnight shift, at 12:06 AM, BRF11 tripped off for the first of six times in three and a half hours; it reset. LRF4 tripped off at 5:41 AM; it reset. A Linac person began a study at 7:49 AM that halted all other beam. During the day shift, at 8:13 AM, a Power Supply person began the LCW repairs for MiniBooNE’s E:HV860. LRF4 tripped off at 8:24 AM; it reset. The Linac studies ended at 8:55 AM; Operations resumed sending beam to the rest of the complex. Booster personnel began a study at 8:55 AM. Operations established beam to T-1015 at 10:06 AM. At 10:10 AM, the MI abort gap clearing kickers tripped off on a “No Fire” indication; the MI-10 kickers tripped off as well. A Controls person investigated and discovered that a Booster-extraction sync had not gone out; everything reset. MiniBooNE resumed taking beam at 10:43 AM. BRF14 & 15 tripped off for the first of two times in 21 minutes at 2:12 PM; it reset. During the evening shift, at 6:26 PM, Operations reported a flurry of Linac quadrupole magnet power supply alarms; Operators and Proton Source personnel investigated. Operators reported that console #5 was issuing interrupts without user input; Operators rebooted the console. At 8:44 PM, a Linac Klystron RF station (KRF1) tripped off; Operators called in a Linac person to investigate. Operators completed a Booster injection tune at 8:52 PM. At 9:16 PM, a NuMI BPM (N:BPM6N) stopped responding; Operators rebooted it. Operations disabled the T-1015 beam at 10:05 PM. Wednesday December 14 The midnight shift began with Operations sending beam to the NuMI and MiniBooNE. During the midnight shift, at 12:35 AM, BRF11 tripped off for the first of seven times in about two hours; it reset. At 5:25 AM, Operators received an alarm for the LRF1 RF water skid and investigated; they noticed a LCW leak coming from near the top of the driver tube. They reported the leak to a Linac person. N:BPM6N stopped polling at 5:42 AM; Operators reset it. At 6 AM, LRF1 tripped off for the first of two times in 23 minutes; a Linac person began repairs at 6:23 AM, which halted all beam. Operators loaded an Energy Conservation timeline into the Time Line Generator. Linac resumed sending beam at 7:53 AM. Operations Coordinator (OpsCo) Plans for Today The OpsCo approved of the plans by Booster personnel to conduct aperture scan studies. |
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| last modified 12/14/2011 email Fermilab |
