Operators: yxiao zhangchi zzhou
1:00 scratch/dblast07 full. delected some runs
1:05 ABS BRP pressuare alarm 10% higher than setpoint. alarm triggered a few times later in the shift
1:26 CCR called, lost transmittor 6.
2:07 CCR called, problem with RF.
2:20 ABS Sextapol top pressure 10% higher than setpoint
2:30 Beam back. WC L6 continued to trip. HV gui refuses to save new setting. can not lower the HV. Set command does not seem to get through. Save command causes broken pipe
3:15 WC L6 does not seem to hold HV at all. not able to lower the set point, stop data taking, turn off WC HV, ask CCR to stop beam
4:00 ABS SFT alarm.
4:40 turned back on, still tripping. called Doug. learned the following:
ftp 172.17.1.41
ftp>quote site ld s0.6 dv 3700
ftp>quote site save 4
4:50 WC L6 lowered to 3500
5:01 decide beam quality is bad. 3 BQM 's > 100, BQM top>200 at beginning of fills WC signal to noise worse than 2 to 1 in inner chambers. Ask CCR to retune
5:30 got beam back. compton died, restarted CODA, COMPTON
5:40 WC L6 lowered to 3400
6:45 Coda died. ROC not reporting status. power recycled both fast bus crate in D tunnel
7:15 Beam is still not satisfactory. during the first 10 minutes of a fill, BQMs fluctuate a lot
7:40 Beam too bad. horrible signal to noise in wire chamber. ask CCR to tune again.
7:50 Beam back.
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