Accelerator Update for October 22, 2007 - October 23, 2007
Monday October 22
The day shift began with the Antiproton Source (Pbar) stacking (100E10), with Operations monitoring a Recycler stash (235.7E10), with the Main Injector (MI), Recycler, Pbar, and Tevatron (TeV) conducting studies, with the SciBooNE / MiniBooNE experiments taking beam, and with the Neutron Therapy Facility (NTF) treating patients.
At 8:27 AM, Operations reported that a TeV RF station (TRF7) was failing.
Operations reported at 9:51 AM that RF experts began repairs on TRF7.
At 10:06 AM, Operations reported that a MI RF station (MIRF01) had tripped. Experts investigated and had it back on 20 minutes later.
Operations halted the stacking at 10:06 AM and Pbar experts began reverse protons studies.
Operations reported at 10:07 AM that they had stashed the Recycler with 2 transfers of antiprotons.
TeV experts resumed their study at 10:57 AM.
Operations prepared the Collider Detector at Fermilab (CDF) for access at 12:36 PM.
Operation prepared the Transfer Hall, sector A, for an hour access at 12:40 PM to repair the stuck kautzky valve.
NTF completed treating their last patient for the day at 1:03 PM.
Operations reported at 1:41 PM that the Recycler began transfers of antiprotons to MI.
At 6:37 PM, Operations reported a quench indication while turning things on. No heater firing units had fired. There was no quench. They also found a lead failure at TeV sector C4.
Pbar resumed stacking at 7:02 PM.
Operations put the TeV through a dry squeeze at 7:47 PM.
TeV studies resumed at 8:21 PM.
At 8:29 PM, the TeV suffered a quench at sector E3. An operator reported that beam had been injected on top of beam. TeV experts investigated.
Pbar experts began sending reverse protons to the Accumulator at 9:07 PM.
Operations began tunes ups for transferring antiprotons from the Recycler to the TeV at 11:44 PM.
Tuesday October 23
The midnight shift began with Pbar conducting studies, with Operations monitoring the stash, with TeV experts preparing to accept antiprotons, and with Sci/MiniBooNE taking beam.
TeV experts completed a successful reverse proton tune up at 1:08 AM.
Operations reported at 1:42 AM that the first transfer of antiprotons was successfully injected into the TeV. Three more transfers had been made by 1:42 AM. Eventually, Operations established a 0x36 antiproton only store.
Operators charged the TeV abort kickers and aborted the TeV store at 2:44 AM.
A Recycler expert began a proton study at 2:44 AM.
Operations put the TeV through a dry squeeze at 3:51 AM.
Operations turned off beam to Sci/MiniBooNE at 5:03 AM.
Operations began preparing the TeV for access at 5:54 AM.
Operations began preparing Pbar for access at 5:55 AM.
Operations had the CDF and D-Zero (D0) collision halls ready for access by 6:01 AM.
Operations began preparing Booster for access at 6:04 AM.
Operations had MI prepared for access by 6:29 AM.
Operations had Linac prepared for access by 6:50 AM.
The Plans for Wednesday
The current status for today is as follows: Linac, Booster, Main Injector, Tevatron, Antiproton Source, CDF, and D0 are all in access. The D0 detector repairs are driving the shutdown.
Comments and Suggestions
|last modified 10/23/2007 email Fermilab|