Goal of this week: Luminosity production.
|
Date |
Summary |
Link to report from morning meeting |
| Monday 5 Nov |
- 00:02 Start filling
- 01:31 Stable Beams fill 3265. Initial lumi 7.0e33 cm-2s-1.
|
08:30
meeting |
| Sunday 4 Nov |
- 00:55 Beams lost due to possible spurious BLM trigger point 7.
Fill 3262
delivered 105 pb-1 in 4h42m
- 03:59 Stable beams fill 3262, initial lumi 7.0e33
cm-2s-1
- 04:27 Beams lost due to instability B1. Delivered 11 pb-1 in 0h27m
- 05:25 Injecting, problems B2 stability, suspect ADT.
- 05:54 No beam from SPS
- 07:14 SPS back again, checking ADT at injection.
- 09:30 Intervention on ADT, set-up of ADT with 6 indivs.
- 11:30 Ready to inject for physics.
- 12:54 Stable beams fill 3264, initial lumi 7.1e33
cm-2s-1.
- 14:25 Beams lost due to spurious BLM trigger L1. 33 pb-1 in 1h31m.
- 15:27 PS Booster problem.
|
09:00
meeting
|
| Saturday 3 Nov |
- 09:04 Beams dumped: Sector 67 trip, RB.A67 ST_ABORT_PIC.
Integrated lumi 143 pb-1 in 9h25m.
- 10:00 Access for ALICE and P6 for MPE piquet and QPS,
micro switch changed.
- 13:45 Pre-cycle
- 14:30 Cryogenics problem IP2
- 16:10 Cryo OK
- 16:40 Injecting physics beam
- 16:42 Successful start-up of daughter number 2
- 19:15 Stable beams fill 3261, initial
lumi 7.3e33 cm-2s-1
|
09:00
meeting |
| Friday 2 Nov |
- 02:50 Stable beams Fill 3252 Initial luminosity: 7.12e33 cm-2s-1
- 06:00 Beams lost to QPS trigger on RCBXV1.R1 Re-armed by OP
- Fill 3252: 65 pb-1 in 3h13m
- 07:15 Injecting physics beams
- 08:45 Stable beams Fill 3253 Initial luminosity ~7.3e33 cm-2s-1
- 09:45 Increase RF voltage from 10 MV to 12 MV
- 12:00 ADT to wideband settings
- 12:38 Beams dumped, lost BLM crate L8. 79 pb-1 in 3h53m
- BLM card change and BLM CPU change. Some access.
- 17:48 Start pre-cycle
- 19:30 Transfer line steering
- 20:29 Beams dumped on last injection B2, LHCb BCM
- 22:09 Filling for physics
- 23:39 Fill 3259. Stable Beams. Initial lumi 6.5e33
cm-2s-1
|
08:30 meeting |
| Thursday 1 Nov |
- 09:15 Fill still in, waiting for SPS before dumping
- Keep fill 3249 until 12:40: 197 pb-1 in 15 hours
- 15:55 Back in stable beams Fill 3250 Initial luminosity 7.23e33 cm-2s-1
- 20:10 Beams lost to spurious QPS trigger on RQX.L1 Heaters fired, lost cryo start and maintain, vacuum valves around IP1 closed
- Fill 3250: 83 pb-1 in 4h17m
- 22:55 Cryo Maintain back
- 23:10 precycle triplet
|
08:30
meeting |
| Wednesday 31 Oct |
- 0:004 Beams dumped, ACSLine4B1: driver fault
Integrated lumi 85 pb-1 in 4h27m.
- 01:30 Filling
- 02:00 MKI.8C vacuum spike - reset and extended softstart
- 04:15 Stable beams fill #3244, initial lumi 7.34e33cm-2s-1
- 06:26 Beams lost due to QPS - RQ4.L1, spurious self trigger of
heaters. 50 pb-1 in 2h14m
- Ramp down
- 09:00 Access in shadow of fibre optics cable move and SPS EDF
intervention
- 12:30 Optical fibre relocation finished
- 12:52 Access finished, followed by ramp with loop closed instead of
standard pre-cycle
- 15:00 Injecting probes
- 16:00 Injection steering, not evident
- 21:42 Stable beams, fill #3249, initial lumi 7.1e33
cm-2s-1
|
08:30
meeting |
| Tuesday 30 Oct |
- 03:32 Beam dumps two correctors tripped in 5. Int. lumi
80.4/1.1/82.6/6.5 pb-1.
- Problems refilling: RF crowbar (solved, not understood), PC faults
IT.R5.
- 7:00 Access for EPC, problem solved.
- 08:40 Pre-cycle IT.R5.
- 09:34 Injecting probe, fill #3240.
- 12:40 Stable beams, intial lumi 6.95e33cm-2s-1
- 14:06 Beams lost due to QPS trigger. 32 pb-1 in 1h28m
- 16:00 ADT team adjusting high bandwidth settings
- 18:10 Injecting for physics
- 19:35 Stable beam fill #3242, initial lumi
7.04e33cm-2s-1
|
08:30
meeting |
| Monday 29 Oct |
- 08:48 V/dM scan CMS end of fill #3236.
- 10:06 V/dM scan finished, start of RF studies, reducing RF voltage.
- 11:10 RF voltage reduced from 12 MV to 9 MV.
- 11:51 Opened TCLs to test for future tests.
- 12:00 TCL tests finished.
- 12:08 Beams dumped by operator. Integrated lumi 216/0.20/211/25.1
pb-1.
- 13:10 Access for experiments, EPC and CV.
- 15:26 QPS trip of matching section R8, related to EPC intervention
on RD2 earlier.
- 18:00 Bad contact found, start pre-cycle.
- 18:54 Injecting probes.
- 19:50 Ramp started fill #3237.
- 19:50 Beam dumped by LBDS at start of ramp, energy tracking MKD B2
generator L.
- 21:12 Injecting physics beam fill #3238.
- 22:55 Stable beams, initial lumi’s 6.5e33 cm-2s-1.
|
08:30 meeting |