Monday October 3
The day shift began with Operations monitoring store 4428 and a Recycler stash, with the Antiproton Source (Pbar) stacking, with the Collider Detector at Fermilab (CDF) and D-Zero (D0) using the colliding beam, with NuMI off due to a Horn ground fault, and with the MiniBooNE and the Meson MCenter experiments taking beam.
Operations began preparing the Recycler at 9:30 AM to stash antiprotons. The stash was completed by 11:14 AM. Pbar resumed stacking and MCenter resumed taking beam.
At 3:51 PM, the Recycler suffered a vacuum burst and had an emittance blowup.
The Recycler began preparing to stash around 4 PM. The stash ended and Pbar resumed stacking at 6:04 PM. MCenter resumed taking beam.
Operations terminated store 4428 at 11:03 PM.
Operations prepared CDF for a collision hall access at 11:17 PM.
Cryo system technicians began a Tevatron (TeV) sector D1 wet engine repair at 11:28 PM.
Tuesday October 4
The midnight shift began with Operations monitoring the stash, with Pbar stacking, with NuMI off due to a Horn ground fault, and with MiniBooNE and MCenter taking beam.
A cryo tech reported at 1:42 AM that the D1 wet engine work was completed.
The Recycler began preparing to stash at 1:52 AM.
CDF came out of access at 2:12 AM.
The stash ended and Pbar resumed stacking at 2:44 AM.
Operations reported at 2:59 AM that the TeV was locked in a 90 GeV null ramp.
At 3:18 AM, Operations reported that they had run the TeV recovery program and a QBS ramp, but the TeV was still stuck at a 90 GeV null ramp. Operators continued their investigations.
At 5:05 AM, Operations reported that they found a problem with the C4 UPS (Uninterruptible Power Supply) and then later a QPM problem. Operations contacted an expert and then changed out the C4 UPS.
Operations reported at 5:47 AM that a TeV expert had managed to get the QPM working. Operators began the TeV turn on.
Operations put the TeV through a dry squeeze at 6:26 AM.
Operations put the TeV into shot setup at 6:51 AM.
The Recycler began preparing to stash at 9:02 AM.
Operations established combination store 4431 at 9:11 AM with an initial luminosity of 141.28E30. This store not only set a New TeV Record Luminosity, but it also broke a World Record Luminosity (for a hadron collider) of ~140E30 set at CERN's ISR in 1982.
Operations prepared Pbar for a tunnel access at 10:22 AM.
Operations prepared Linac and the I- Source for access at 10:26 AM.
Experts came out of the I- Source access at 10:39 AM.
Operations reported that the Linac access had ended and that Operators had sent beam to the Linac dump by 1 PM.
MiniBooNE resumed taking beam at 1:42 PM and Pbar resumed stacking at 1:49 PM.
MCenter resumed taking beam at 2:14 PM.
Recycler began preparing to stash around 8:30 PM. The stash ended and Pbar resumed stacking at 11:18 PM. MCenter also resumed taking beam.
Wednesday October 5
The midnight shift began with Operations monitoring store 4431 and the stash, with Pbar stacking, with NuMI off due to a Horn ground fault, and with MiniBooNE and MCenter taking beam.
Recycler began preparing to stash at 3:53 AM. The stash ended and Pbar resumed stacking at 5:07 AM.
At 6:08 AM, the Booster East Anode Power Supply (EAPS) and the BRF4 tripped off. Operations restored beam by 6:19 AM, but BRF4 remained off. Operations brought BRF4 back on line by 6:50 AM.
The Plans for Wednesday
The plans for today are to stack, stash, and store.
Accelerator Update Archive
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