Goal of this week: Luminosity production.
|
Date |
Summary |
Link to report from morning meeting |
| Mon 19 Nov |
- 03:11 RF problem solved.
- 05:38 Stable beams fill 3300. Initial lumi 7.5e33
cm-2s-1.
|
08:30
meeting
|
| Sun 18 Nov |
- 00:03 Beam dump due to instability and losses on two bunches leading to BPM LSS6 trigger. ~10 pb-1 in 25 mins. Revert to smaller tune split (-0.003)
- 02:30 Stable beams 3298. Initial luminosity 7.5e33
cm-2s-1
- 05:45 Beam dumped by OP on request of ALICE for an urgent
intervention on the cooling of their TPC.
- End of fill 3298 producing ~70 pb-1 in 3:17 h.
- 06:20 Access starting
- 08:30 Access finished. Restarting
- 10:53 STABLE BEAMS #3299. Initial luminosity 7.3e33
cm-2s-1
- 22:37 Operator dump, 174 pb-1 in 11h44m.
- 23:07 RF trip M1B2. Access needed.
|
09:00 meeting |
| Sat 17 Nov |
- 00:18 Sector 56 tripped while setting to stand-by after access.
Problem with RQ10.R5, QPS problem suspected.
- 02:30 Problem RQ10.R5 identified to be due to power converter
problem.
- 04:50 Access for power converter RQ10.R5.
- 05:29 Access finished.
- 06:42 Injecting fill 3296, clean without steering.
- 07:35 Start ramp.
- 08:23 Stable beams 3296, initial lumi around 7.1e33 cm-2s-1.
- 15:30 No beam from SPS Beam dump switch to be replaced)
- 20:40 Beam available from SPS
- 20:50 OP dump: ~180 pb-1 in 12.5 hours.
- 23:39 Stable beams 3297. Initial luminosity 7.3e33 cm-2s-1. Larger tune split during the squeeze (-0.005)
|
08:30
meeting
|
| Fri 16 Nov |
- 00:47: Beam loss spike at Q6R5 close to Roman Pot (running sum 1.2
s). Beam dump at 1.2 TeV.
- Reduced bunch intensity to ~1.6x1011 p and longitudinal blow-up to
1.4 ns
- 02:58 Beam dump during adjust: UFO like event of Roman Pot Q6L5
- 05:16 STABLE BEAMS fill 3292. 6.3x1033 cm-2s-1
- 08:56 Beam dump (SW interlock TCDQ reading - old data). 68 pb-1 in
3h40m.
- 11:27 Stable beams fill 3293. Initial lumi 6.85e33
cm-2s-1. Longitudinal blow-up 1.4 ns B2 only.
- 12:44 Beam dump, QPS trigger on RQT13.L5B2. Integrated lumi 28 pb-1
in 1h17m.
- 14:17 Start ramp fill 3294.
- 14:27 Dump during ramp at 2.86 GeV, dump due to slow losses at Q6.R5.
- 17:14 Start ramp fill 3295.
- 18:29 Operator dump before colliding in LHCb. Steering problems.
- 20:43 Injection fill 3296. Stop, problem corrector RCBH.23L6B1.
- 21:00 Access for RCBH.23L6B1 and warm up beam screen Q6.R5 near
TOTEM.
|
08:30 meeting
|
| Thu 15 Nov |
- 04:30 OP dump. End of fill 3287. 137 pb-1 in 9h01m.
- No transfer line steering. Profit from reduced PS extraction kicker
pulse length.
- 06:58 Stable beams fill 3288. Initial luminosity ~6.6e33 cm-2s-1.
- 2fb-1 delivered to LHCb
- 18:47-20:00 TOTEM test with separated beams in CMS
- 20:02 OP dump 176 (ATLAS) / 170 (CMS) pb-1 in 13 h. More than 21 fb-1 delivered to ATLAS/CMS
- 22:53 Beam loss spike at Q6R5 close to Roman Pot (running sum 5.6 s).
Beam dump at 2.8 TeV.
|
08:30
meeting
|
| Wed 14 Nov |
- 03:30 Stable beams fill 3286, initial lumi's up7.5 e33 cm-2s-1.
ALICE at 6.6e30 cm-2s-1
- 13:52 Beam dump when moving TOTEM Roman Pot in to 30 mm setting.
162
pb-1 in 10h20m.
- 14:45 No beam fron LINAC2.
- 16:13 Problem with PS water cooling.
- 17:07 Injectors back. Optimising beams in injectors. Steering.
- 19:31 Stable beams fill 3287, initial lumi's around
6.4e33 cm-2s-1.
ALICE 5.6e30 cm-2s-1
|
08:30 meeting |
| Tue 13 Nov |
- 06:30 Cryogenics back – pre-cycle.
- 08:00 Injecting pilots, steering.
- 09:00 No beam from injectors, problem with Booster distributer.
- 11:35 Booster back. Check injection 144 bunches: OK.
- 12:00 Set-up of gated BBQ for B2.
- 12:30 Continue filling for physics: very clean.
- 13:00 Start ramp fill 3285.
- 13:56 Stable beams, initial lumi's around 7.2 e33, ALICE 3.4e30
cm-2s-1.
- 24:00 End of fill 3285. OP dump.153 pb-1 in ~10h10m.
|
08:30
meeting |
| Mon 12 Nov |
- 04:50 Beam dump, trip of RF line 4B, integrated L ~120 pb-1.
- Access for RF.
- 07:00 Injecting. FBCT phasing. Line steering.
- 09:59 Beam dunp LHCb on injection. Reduce satellites in PS.
- 10:30 Transvers damper module H2B2 down and RF lines tripped.
- 13:24 ADT problem fixed. Injecting for physics.
- 13:52 Start ramp.
- 13:55 Cryo problem in point 4. Cryo ok will be lost in few minutes.
- 14:05 Beam dumped due to cryogenics point 4.
- Cryo recovery.
|
08:30 meeting |