Accelerator Update - May 19-May 21 Last week the Fermilab accelerators broke several records. Fermilab set a new integrated luminosity record with a level of 9159 nb-1. The Main Injector (MI) broke a record that wasn't reported, that of a high intensity of protons, 5.45E12, being sent to the Antiproton Source (Pbar) target for a single pulse.
Monday May 19 At 9:39 AM, operators investigated a reported problem and found a small LCW leak on a Pbar Debuncher magnet (D2SF9). Operators had beam in Linac and to the Booster dump by 6:13 PM. A Linac expert began a study period. Operators established beam to the MI dump at 7:37 PM. At 8:24 PM, a TeV expert began an end-of-store study with what was left of store 2562. The Linac expert completed his studies at 8:54 PM. Operations established beam to MiniBooNe at 9:03 PM. At 9:10 PM, the TeV suffered a sector F4 quench and lost store 2562 due to the end-of-store study. Operations discovered that a Pbar RF station (DRF1) was having a problem. Operators managed to get some beam to circulate so they could conduct a reverse proton study at 11:03 PM. Later a number of devices had a power loss. Operators called the Duty Mechanic to investigate a possible breaker problem. At 11:51 PM, Operations put the TeV through a dry squeeze.
Tuesday May 20 At 6:55 AM, the Linac Klystron debuncher tripped off on a water flow indication. Operators found its water pump tripped off. It reset okay, but at 11:10 AM it tripped off several more times. Switchyard (SY) experts began attempting to run beam to the SY dump at 10:14 AM. They eventually sent beam to TeV sector F45. MI experts set a record intensity level of 2.15E13 multi-batching at 7 PM, which is how the NUMI experiment would be getting beam when it begins operating. At 7 PM, the TeV quenched at sector BA while Operations was trying to abort the beam. TeV experts resumed their studies at 10:13 PM.
Wednesday May 21 At 12:03 AM, Pbar expert completed their studies. Pbar began stacking at 1 AM. At 7:32 AM, MI suffered a vacuum problem that caused many vacuum valves to close. The areas must be pumped down to open the valves. This problem halted stacking.
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last modified 5/21/2003 email Fermilab |
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