Shift workers:
Chao Gu(SL). Jie Liu(TO), Jechiel Lichtenstadt(3rd)
00:00 Shift starts. We do not have beam because some injector RF issue.
01:40 Beam is back. Continue to take production data.
03:40 The polarization of BOTTOM cell dropped to 65%, so we increased
the beam current to 100nA.
04:00 Start dilution runs.
04:40 Start to polarize the TOP cell.
04:45 The target can not be polarized. We called the target expert to
look into this problem.
06:00 James found that the NMR tune for TOP cell is not good. So we
asked for an access to fix this problem.
06:30 James fixed the problem. Hall back to beam permit and we start
to polarize the TOP cell.
06:55 Left septa tripped.
07:05 IHWP to IN by Hall C.
07:20 Try to call Jack and we can not get him. So RC called Alex to
power cycle the septa.
07:40 Escorted access to reset the septa.
08:00 There is a problem with the septa power supply. We are still in
controlled access when shift ends.
Production run# at 2.8200GeV (Goal: 127M)
| Run# | IHWP | Pt | Events | Effective | Total |
|---|---|---|---|---|---|
| 6135 | OUT | 70.0 | 7.0 | 7.0 | 36.1 |
| 6136 | OUT | 67.0 | 7.0 | 6.4 | 42.5 |
| 6137 | OUT | 65.5 | 7.0 | 6.1 | 48.6 |
| 6139 | OUT | 65.0 | 7.0 | 6.0 | 54.6 |
| 6140 | OUT | 58.0 | 7.0 | 4.8 | 59.4 |
Dilution run# at 2.8200GeV
| Run# | Target | Events |
|---|---|---|
| 6141 | Empty | 1.03 |
| 6142 | Carbon | 1.65 |
| 6143 | Dummy | 1.03 |
Production run# at 2.2017GeV (Goal: 47M)
| Run# | IHWP | Pt | Events | Effective | Total |
|---|---|---|---|---|---|
| 24741 | OUT | 68.5 | 5.0 | 4.8 | 15.3 |
| 24742 | OUT | 66.5 | 2.3 | 2.0 | 17.3 |
| 24743 | OUT | 65.0 | 2.5 | 2.1 | 19.4 |
| 24744 | OUT | 58.0 | 4.2 | 2.9 | 22.3 |
Dilution run# at 2.2017GeV
| Run# | Target | Events |
|---|---|---|
| 24745 | Empty | 0.52 |
| 24746 | Carbon | 0.86 |
| 24747 | Dummy | 0.54 |