Accelerator Update - June 9-June 11
Monday June 9 D0 came out of access at 8:31 AM. At 9:23 AM, Operations put the Tevatron (TeV) into shot setup. Operations established store 2667 at 11:55 AM with an initial luminosity of 27.45E30. The TeV front end crashed. A controls expert rebooted the computer at 3:12 PM. At 10:38 PM, a Main Injector (MI) expert began conducting studies.
Tuesday June 10 At 1:41 AM, Operations terminated store 2667. D0 accessed their collision hall. D0 came out of access at 5:30 AM. At 6:15 AM, TeV experts began a period of beam maintenance focusing on the sextupole magnets. Operations put the TeV through a dry squeeze at 1:24 PM and then put the TeV into shot setup at 1:51 PM. D0 reported having some trouble with their toroid magnet at 2:12 PM. An expert had the toroid working normally forty minutes later. A Linac expert reported that Linac technicians were changing the driver tube for a RF station (LRF2). This held off all downstream beam. At 3:30 PM, Operations established store 2671 with an initial luminosity of 28.04E30. Linac techs completed their work on LRF2 at 4:57 AM. Pbar resumed stacking and MiniBooNE resumed taking beam. The Collider Detector Facility (CDF) called complaining about the Tune of the beam. Operators made a horizontal change, which resolved the problem.
Wednesday June 11 At 3 AM, Operations worked on the Booster to resolve beam problems for MiniBooNE. Operators completed their tuning at 4 PM. MiniBooNE beam was off during this time. Operations terminated store 2671 at 6:13 AM. TeV experts began a beam maintenance period. A Switchyard expert began a study period at 6:23 AM. The expert reported getting beam to TeV sector F49 on the first pulse. This sector is the point where beam leaves the TeV tunnel and enters the Switchyard transfer lines.
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last modified 6/13/2003 email Fermilab |
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