|
Date |
Summary |
Link to report from morning meeting |
| Mon 28st January |
- 01:30 Loss maps. Full set of betatron loss maps as well as negative
off-momentum loss map
- 02:39 Beams dumped by negative off-momentum loss maps
- 03:33 Lost RB.A12 power converter fault
- 04:15 Cycling
- 05:25 Water circuit problem affects the booster, no protons
- 07:23 Beam back
- 07:57 Ramp started
- 09:16 Dumped with off momentum loss map
|
08:30
meeting |
| 0 |
- 02:25 Stable beams fill 3496
- 08:26 Beams dumped by BPMS, 1.2 nb-1 in 6h2m
- 10:58 Beams dumped while going into collision, UFO ALICE?
- 13:59 Stable Beams fill 3498
- 14:33 ALICE from levelling to optimised
- 20:10 Operator dump 1.4 nb-1 in 6h11m
- 22:47 Ramp for collimator set-up, orbit, lumi, TCTs
|
09:00
meeting |
| Sat 26th January |
- 01:06 Dump due to BPMS after 5h17m, about 1 nb-1
- 02:46 Injecting for physics
- 04:46 Stable beams fill 3494
- 09:34 ALICE’s solenoid trips
- 11:06 Beams dumped by BPMS, 1.1 nb-1 in 6h21m
- 15:55 Stable beams fill 3495
- 22:06 Beams dumped by BPMS, 1.2 nb-1 in 6h14m
|
09:00
meeting |
| Fri 25th January |
- Some delay filling: SPS RF issues
- 04:30 Stable beams fill 3490 Initial lumi: 1e29
- 10:35 ALICE colliding head-on.
- 10:58 Beams dumped by BPMS. 1.4 nb-1 in 6h29m.
- 13:00 Injection steering and simultaneous tests of RF bbb blow-up
to reduce transverse blow-up at injection
- 14:30 Start filling for physics... but PS POPS is down
- 17:30 Injecting again
- 19:49 Stable beams fill 3493, Initial lumi:1e29 cm-2s-1
|
08:30 meeting |
| Thu 24th January |
- 00:06 Stable Beams – turn around of 3h36m Initial lumi 1.1e29 cm-2s-1
- 00:11 ALFA moved in
- 05:34 Beams dumped due to BPMS B2, 1.35 nb-1 in 5h329m
- 06:48 Injecting for physics
- 07:40 QPS triggered on RQX.L8; beams dumped
- 08:51 Cycling
- 10:05 Injecting probes
- Issues various: LHC BPM calibration done with wrong settings Spurious losses in SPS with ion beam Energy mis-match between PS and SPS Tune excursion Chromaticty
- 16:00 Start ramp
- 16:55 Stable beams – fill 3489 Initial luminosity: 8.55e28 cm-2s-1
- 22:42 Beam dumped by BPMS 5h51m in Stable beams; 1.1 nb-1 in ATLAS/CMS
|
08:30
meeting
|
| Wed 23th January |
- 00:55 injecting probes Now switched to full injection scheme 338p_338Pb
- Struggle with injection: beam in SPS (tails, orbit…); beam dumped over injecting; injection sequencer issues…
- 05:13 Lost RB.81 to QPS trigger. MPE clear to pre-cycle – analysis offline
- 07:05 Injecting probes
- 11:00 stable beams fill 3485 - initial lumi in ATLAS and CMS ~1e29 cm-2s-1.
- 20:30 Beams dumped due to low intensity B2 bunches resulting in BPMS
interlock. Integrated lumi 1,9 nb-1 in 9h23m.
- 22:00 Injecting for physics
- 22:27 FBCT B1 lost the phasing, Expert checking.
|
08:30 meeting
|
| Tue 22th January |
- 06:58 Beam dumped by operator, fill #3481.
- 11:53 Stable beams fill #3482, initial lumi 6.4e28 cm-2s-1.
- 11:12 Start cogging No problems – see over
- 11:53 Stable beams fill 3482
- 12:15 ALFA: Roman Pots on beam 1 at 13 nominal sigma.
- 12:25 TOTEM pots (2 vertical) in 14:25 beam RF total voltage to 13.5 MV and then 14 MV later
- 22:01 TOTEM: extracted all Roman Pots manually.
- 23:48 fill 3482 Dumped by BPMS - low intensity Pb bunches (3e9) Integrated luminosity: 1.5 nb-1
|
08:30
meeting
|
| Mon 21th January |
- 05:20 Injecting 338 bunches/beam fill 3479
- 08:13 Dump on BLM losses 9L7, B2, during change of RF frequency at
flat top to common RF frequency.
- 09:00 Access for LHCb who can't take data.
- 11:20 Cycling.
- 14:00 Filling for physics 200ns_270p_248Pb_15inj24bpi.
- 15:21 Second dump due to losses on BLM 9L7.B2 during RF frequency
change.
- 18:15 Injecting physics beam.
- 20:47 Stable beams fill #3481.
|
08:30 meeting
Ion summary (J.Jowett)
|