Friday July 2
The day shift began with Operations monitoring store 3612, with the Antiproton Source (Pbar) off due to work on a Linac RFstation (KRF7), and with the Recycler stashing antiprotons.
Linac technicians completed their work on KRF7 at 8:30 AM. Pbar resumed stacking.
A Booster expert began a cogging study at 10:56 AM. The study lasted twenty minutes.
A Main Injector expert began a study period around 4 PM.
At 9:41 PM, a Booster RF station (BRF1) tripped off. It reset okay.
At 11 PM, the Pbar beam suffered an emittance problem that took about an hour to resolve.
Saturday July 3
The midnight shift began with Operations monitoring store 3612 and the stash, with Pbar stacking, and with MiniBooNE and the Meson MTest experiments taking beam.
At 12:04 AM, a Linac RF station (LRF1) tripped off. It reset okay.
Operations established beam to the MCenter experiment at 12:05 AM.
A Booster kicker (MKS02) tripped off at 12:16 AM. Operators had trouble resetting the device and called in experts. They arrived around 1:30 AM and discovered a problem with the kicker's PFN. They had the station back on by 2 AM and stacking and beam to MiniBooNE and MCenter resumed.
Operations terminated store 3612 at 3:58 AM.
Operations put the Tevatron (TeV) into shot setup at 4:38 AM and disabled the Switchyard (SY) beam.
MTest experimenters finished using the beam at 4:56 AM.
Operations established store 3614 at 6:22 AM with an initial luminosity of 74.18E30.
Operations reestablished beam to MCenter and MTest at 6:35 AM.
Pbar resumed stacking at 6:47 AM. The delay in stacking was due to a problem with the Accumulator septum (A:ISEP1V).
Operators began stashing antiprotons into the Recycler at 9:30 AM.
Stashing ended and stacking resumed at 10:25 AM.
At 11:12 AM, the Linac suffered a trip of two RF stations (LRF1 & 2). Operator investigated and had the stations back up by 11:23 AM.
At 12:26 PM, the Collider Detector at Fermilab (CDF) had to turn off their detector due to colliding beam problems. Operators made some longitudinal damper adjustments.
At 3:44 PM, a SY septum (S:FSEPV) tripped off for the first of seven times in four hours. It reset okay.
At 3:48 PM, a TeV vertical separator sparked and caused some colliding beam problems.
At 4:30 PM, Operations reported that problems with a Pbar Debuncher RF station (DRF2) had been limiting stacking by about 10%. Operators contacted an expert who came in at 4:45 PM.
A Booster RF station (BRF12) tripped off at 5:12 PM.
Operations established beam to MTest at 7:34 PM.
Operations contacted another Pbar RF expert at 8:22 PM that said he'd come in to look at DRF2.
Operations reported at 9:38 PM that BRF12 had tripped off a bit earlier. It reset okay.
At 11:13 PM, Operations reported that BRF12 tripped off again. It reset okay.
MI studies finished at 11:59 PM.
Sunday July 4
The midnight shift began with Operations monitoring store 3614 and the stash, with Pbar stacking, and with MiniBooNE and MTest taking beam.
A Pbar expert managed to get DRF2 up and running normally by 12:16 AM.
At 1:02 AM, a Linac RF station (LRF4) tripped off. It reset okay.
MTest reported that they were done using the beam at 2:43 AM.
At 3:50 AM, Operations reported that BRF12 ran for about twenty minutes and then tripped off again. It tripped again at 4:05 AM and then again at 5:27 AM.
FSEPV tripped off at 5:45 AM. It reset okay.
At 8 AM, Operations reported that BRF12 was off due to an FBS ground fault.
At 8:27 AM, a Debuncher vacuum pump tripped off. Operators had the pump back on twenty-minutes later.
BRF12 tripped off at 9:33 AM and then a few more times throughout the day and early evening.
Operations terminated store 3614 at 9:39 AM.
Operations made the CDF and D-Zero (D0) collision halls ready for access at 9:52 AM. Both experiments were out of access by 11:24 AM.
Operations put the TeV through a dry squeeze at 11:50 AM.
Operations put the TeV into shot setup and then established store 3616 at 2:55 PM with an initial luminosity of 75.16E30. Pbar resumed stacking.
Operations began stashing antiprotons to the Recycler at 5:09 PM. Pbar resumed stacking at 5:50 PM.
A Pbar expert began investigating the lower that expected antiproton production at 7:39 PM.
At 11:08 PM, a lightning strike caused a glitch that tripped off the MI beam safety system permit. LRF1 & 2 both tripped off. Both stations reset okay.
Monday July 5
The midnight shift began with Operations monitoring store 3616 and the stash, with Pbar stacking, and with MiniBooNE and Meson taking beam.
At 2:24 AM, the TeV suffered a sector D0 quench. The D0 service building fire alarm also went off. In addition, the power tripped off for this building. This was a multi-house quench. After the Fire Department said everything was okay, the Duty Electrician began investigating the problem.
BRF13 tripped off at 2:35 AM. It reset okay.
At 3:15 AM, the E0 service building had a fire alarm due to a cryo system cold compressor that smoked. Operators reported that nine compressors tripped off around the TeV ring during the quench. CHL reported at 4 AM that they were having trouble getting some of the compressor back on.
At 5:46 AM, a LCW water pump for LRF5 tripped off. Operators had to add water to the cavity system. They had the pump and the station back on by 6:35 AM. Pbar resumed stacking.
Operations reestablished beam to MTest at 6:43 AM.
LRF5 tripped off at 7:34 AM. Operators worked at getting the station working again.
BRF16 tripped off at 8 AM. It reset okay.
Plans for Monday Morning
The plan for today is to fix the LRF5 station and then to continue with stacking and storing.
Accelerator Update Archive
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