Log entry time 16:15:40 on February 07, 2004

Entry number 75689

Highlights

1. Halo target was retracted at about 08:16 when the IOC was rebooted; it was put back into beam at 10:26.
2. Beam was taken away to tune for Hall B at 09:55; there was no consistent beam until 11:06. There was apparently a misunderstanding about beam steering, which extended the recovery until 11:30.
3. A set of coil modulation and 120 Hz runs were taken at about 13:35. The remainder of the shift was in production runs on the empty target.
4. During production run 19678, I cleared the error condition on the LTD8 in LTD crate 2; this effected detector 12 of octants 3/7.

Summary

• Shift began with production run 19677 in progress.
• 09:07---Started production run 19678.
  Try to fix the NA LTD errors during this run; LTD8 in crate 2 had a large number of errors, LTD6 in crate 2 had a few. Cleared the errors by un-/re-plugging the CLK cables coming out of the SDB for those channels.
• 09:40---A series of beam trips occur, when beam come back the steering is off in Y on G0 and G0B by about +0.5 mm. Called to request resteering.
• 09:54---Beam was taken away to do tuning for Hall B. Estimated 30 minutes.
• 10:26---Noticed that the halo target was out of the beam. Called to have it put back in.
  MCC is still working to tune the beam for Hall B.
• 10:28---MCC starts to restore beam in Hall C. There are lots of trips.
• 10:32---The HV interlock trips on detector 1-14-FL; we leave the HV off while they are trying to get the beam into the hall.
• 10:35---Now trying pulsed beam.
• 10:50---Still trying to restore beam; estimated 10-15 minutes from now.
• 11:06---MCC is starting to send beam into Hall C.
• 11:20---Turned on HV while the beam steering is taking place.
• 11:26---There seems to have been a miscommunication about our desired beam positions: the X of G0B and the Y of G0 were swapped on MCC's paper. They are trying to set the new positons.
• 11:30---The G0 and G0B positions are now good:
  G0 X==-1.03, Y==-1.97
  G0B X==-1.55, Y==1.04
  Started run 19679 while the final steering was being done.
• 12:33---Started production run 19680.
• 13:34---Stopped run 19680. CODA did not end correctly, and I was unable to reset it. I killed and restarted CODA. I started run 19681 in 120 Hz mode, but it got no events. Reset CODA.
  DAQ was down for 10 minutes, of which 7 had beam.
• 13:44---Started run 19682 in 120 Hz mode at 13:44.
• 13:54---Started run 19683 to take a coil pulsing run, but forgot to change the prescales first. Ended immediately.
  Started run 19684 to take a coil pulsing run.
• 14:02---Started production run 19685.
• 15:10---Started production run 19686.

Run list from database

 Run   | NBM ID  |  CP ID  | good_for
--------------------------------------------------------------
19677  | 453     | 453     | production,empty_target
19678  | 453     | 453     | production,empty_target
19679  | 453     | 453     | production,empty_target
19680  | 453     | 453     | production,empty_target
19681  | 453     | 453     | 120_hz,junk
19682  | !!N/R!! | 453     | empty_target,120_hz
19683  | !!N/R!! | 453     | 120_hz,junk
19684  | 453     | 453     | empty_target,coil_pulsing
19685  | !!N/R!! | 453     | production,empty_target
19686  | !!N/R!! | !!N/R!! | production,empty_target
19687  | !!N/R!! | !!N/R!! | production,empty_target