Log entry time 08:26:33 on April 05, 2010

Entry number 316480

Shift Leader: P. King;
Target: M. Friend.

Major activities:

• BCM/BPM calibration
• Pseudoproduction runs: 50 uA, empty target, no raster
  
  • 2607: 150k events
  • 2608: 300k
  • 2609: 383k
  • 2610: 100k
  • 2621: 300k
  • 2622:
• Pseudoproduction runs: 50 uA, empty target, 4x4 raster
  
  • 2623: 300k
  • 2624: 300k
  • 2625: 300k
  • 2626: 300k
  • 2627: 300k
  • 2628:
• Pseudoproduction runs: 55 uA empty target
  
  • 2629: 300k
  • 2630: 300k
  • 2631: 300k

00:00---Start pseudoproduction run, 2607.

00:13---Start pseudoproduction run, 2608.

00:33---Start pseudoproduction run, 2609.

01:03---Start pseudoproduction run, 2610. The BPM12 wire plots are back in panguin; we notice the signal is very small (~10k instead of 60k-80k). We ask for a gain search; it has no apparent effect on the signal levels.

01:09---Start setting up for a BCM calibration run. Rupesh swaps BCM 1 & 2.

01:34---Test run, 2611.

01:47---Test run, 2612.

01:47---Test run, 2613.

01:59---Set iocse8 and iocse10 to "gains off". OPS notices that iocse9 is in "high RF gain" which it shouldn't be (?) at this current; set to "low RF gain" and rerun gain search. We look at BPM12 wire signals; no obvious change, they are still small.

02:07---Start BCM/BPM calibration run, 2618.

02:08---Beam down due to RF trouble. Stop BCM/BPM calibration run, 2618; no significant amount of beam.

02:21---Beam restored. CODA problems: junk runs 2615 & 2616.

02:28---Start BCM/BPM calibration run, 2617. IOCSE8 and IOCSE10 are set to gains off. Laser attenuator settings and MPS BCM currents:

	138	54
	130	48
	120	37
	110	28
	100	20
	105	22
	115	31
	125	40
	128	43
	132	47
	136	52
	138	54

02:58---Finish BCM/BPM calibration run. Restore iocse8 and iocse10 back to autogain. Redo gainmatch for iocse9.

03:16---Ask OPS to turn off FFB and put iocse9 into "normal SEE ops" mode.

03:19---Start pseudoproduction run, 2619. 03:40---Turn FFB back on. How to be in "manual gain mode"? We try "gains off" on iocse9. Start pseudoproduction run, 2620.

We find the FFB gain control mode on the screen: Hall A Fast FeedBack Control/Debug/BPM Gain Control.

Iocse9 is reset to "auto gain" from the SEE gain control screen, and "manual" mode in FFB gain control.

The BPM12 wire signals in panguin are very small (~10k instead of 60k-80k) through-out all of these changes in configuration of the iocse9 mode.

03:59---Start pseudoproduction run, 2621.

04:24---Start pseudoproduction run, 2622.

04:29---Request the raster to be turned on: 18x8 in MCC units. Start pseudoproduction run, 2623.

04:55---Start pseudoproduction run, 2624.

05:17---Start pseudoproduction run, 2625.

05:39---Start pseudoproduction run, 2626.

06:01---Start pseudoproduction run, 2627.

06:10---Beam trip; recovered at 06:18.

06:21---Start pseudoproduction run, 2628.

06:40---Requested an increase in beam current to 60 uA on the MPS BCM. Start pseudoproduction run, 2629.

07:02---Start pseudoproduction run, 2630.

07:25---Start pseudoproduction run, 2631.

07:47---Start pseudoproduction run, 2632.

Shift ends with run 2632 in progress, just as Left Q1 trips with liquid level of 17 % and dropping.