Operations terminated store 2934 at 8:34 AM.
The Collider Detector Facility (CDF) and D-zero (D0) accessed their collision halls around 9 AM. CDF and D0 were out of access by 12 PM.
Linac beam came back at 11:59 AM. Stacking and beam to MiniBooNE resumed.
Linac RF stations 3&4 began suffering from intertank phasing problems again at 1 PM.
Tevatron (TeV) experts began a study period at 2:21 PM.
Switchyard experts began a study period at 4:15 PM.
LRF3 tripped off at 5:42 PM. It reset okay.
Saturday August 23
A Switchyard expert began a study period at 9:09 AM.
A MI expert began a study period at 9:56 AM.
BRF18 tripped off at 10:39 AM. It reset okay.
At 12:10 PM, MI began suffering from beam problems. Operators worked at tuning the accelerator, but the problems still kept MiniBooNE off. At 1:48 PM, Operations discovered a Booster damper that had tripped off. It reset okay. This damper tripped off three more times between 3 and 3:30 PM. Later this was discovered to be a temperature problem in the equipment room. Operators installed a fan.
At 3 PM, MI RF stations 5, 13, & 14 tripped off. They reset okay, but they tripped off three more times over the next hour and a half.
Operations terminated store 2937 at 4:02 PM.
The Switchyard expert completed his study at 4:15 PM.
CDF and D0 accessed their collision halls at 4:25 PM.
MI studies finished at 5:02 PM.
D0 came out of access at 5:04 and CDF came out at 5:26 PM.
Operations put the TeV into shot setup at 6:10 PM and at 8:07 PM established store 2939 with an initial luminosity of 4.2E31. Pbar resumed stacking.
A Linac RF station (LRF2) tripped off at 11:54 PM. It reset okay.
Sunday August 24
A Booster RF station (BRF4) tripped off at 6:10 AM. It reset okay,
A Linac RF station (LRF4) tripped off at 7:15 AM and then again three minutes later. It reset okay both times. LRF1 also tripped off during this time.
BRF4 tripped off at 7:30 AM. It reset okay.
BRF5 & 6 tripped off due to high vacuum pressure. They reset okay.
LRF3 tripped off at 8:54 AM. It reset okay.
LRF4 tripped off at 9:55 AM. It reset okay.
A NuMI expert began a study at 11:04 AM.
MIRF3, 10, & 13 tripped off at 11:23 AM. They rest okay.
Operations terminated store 2939 at 2:13 PM.
MI studies ended at 2:30 PM.
Operations put the TeV into shot setup at 3:04 PM. At 4:47 PM, Operations established store 2941 with an initial luminosity of 4.0E31. Pbar resumed stacking.
Operations tuned the Booster beam from 6:30 to 7:30 PM. Operations started tuning the MI beam at 8:46 PM.
Monday August 25
At 2:24 AM, a power glitch caused the TeV to quench at sector B0. Many devices tripped off all over the complex, including wet engines and cryo systems. Operations contacted the Duty Electrician and he said there was problem with feeder 47.
Operations established beam to Pbar at 3:15 AM, and beam to MiniBooNE at 3:41 AM.
Comments and Suggestions
|last modified 8/25/2003 email Fermilab|