|
Date |
Summary |
Link to report from morning meeting |
| Monday 10 September |
- 08:00 Start MD (RF -rephasing in preparation for pPb)
|
08:30 meeting - weekly summary |
| Sunday 9 September |
- Stable beams until 10:35. Fill dumped by OP - 178 pb-1 in 12h13m.
- Access for QPS
- 16:34 lost next fill to sharp loss towards end of squeeze
- Back in stable beams by 19:25 - keep fill over night - dumped at 06:00 Monday to prepare for MD (access required for QPS). Fill 3047 - 146 pb-1 in 10h36m
|
09:00 meeting
|
| Saturday 8 September |
- 00:39 Lost 3039 lost communication with RCS.A67B1 switch controller; 19.2 pb-1 in 48 minutes
- Access required for QPS piquet
- 02:45 start pre-cycle
- 04:55 Flat-top – nice beams
- 05:09 RQF and RQD S23 trip
- Motor for the demineralised water pump C211A ( pump for all of sector 23 and 34) needs to be changed. Experts working and transport being arranged ... the motor is a 1.5 ton object
- 13:20 Access for pump motor in Pt 2 is finished after very efficient exchange - thanks to CV, SPIE et al
- precycle LHC
- 15:40 injection
- 16:40 injection beam 1 finished, beam dump, reason unclear (BLM)
- 17:17 injection
- 18:20 ramp
- 19:06 adjust & beam dump: instability
- 21:00 new injection
- 22:20 stable beams, L0 = 7.3 E33
|
09:00 meeting
Inner triplet trip (Markus Zerlauth) |
Friday
7 September |
- 00:52 beam dump, trip RF
- 02:00 injection, ramp & squeeze
- 03:40 adjust & beam dump: BLM, sudden losses at last steps of adjust
- 04:50 injection
- 06:00 stable beams, L0=7.2 E33
- 11:28 Lost fill 3036 PC fault on IT R5. 102 pb-1 in 5h 34m
- The reset of the RQX5.R5 took longer than normal due to the reset of the converter, a problem with the communication between the UPS and the PIC for point 5, and a problem on the RQX5.R5 QPS board B that required a reset. The QPS reset could not be done remotely, and so a short access was needed.
- 15:00 Start pre-cycle
- Fill for ramp squeeze collide collide set-up
- 19:15 Beams dumped
- 23:50 Stable beams – fill 3039 Initial luminosity: 7.44e33 cm-2s-1 Total intensity 2.22e14, ~1.62e11 ppb
|
8:30 meeting |
Thursday
6 September
|
- 01:10 Fill 3032 dumped by OP 117 pb-1 in 8h 58m
- QPS problem - access required*2
- 08:00 problem fixed - precycling
- 10:00 injection
- 11:15 stable beams, L0=7.1 E33
- 20:00 programmed dump, 145 pb-1
- 22:15 new injection
- 23:30 stable beams, L0=7.5 E33
|
9:00 meeting |
Wednesday
5 Sep |
- 06:45 beam loss: EDF
- 06:34 Lost fill 3029 120 pb-1 in 6h46m
- Electrical glitch all over CERN, captured by FMCM of RD1.LR5
- Access required for QPS
- 10:00 – 14:00 Controls issues with BQM followed by Batch by Batch blow-up tests…
- 16:00 Stable beams #3032 Initial luminosity: 6.2e33cm-2s-1, initial bunch currents: 1.52/1.45 e11 ppb
- ~18:00 Klystron 3B1 in saturation - coupler in wrong position - briefly in ADJUST while RF sort the problem out.
|
8:30 meeting |
| Tuesday 4 Sep |
- 06:08 lost 3205 to lost the sector 23 due to the trip of RQD/F
- 3205: 133 pb-1 in 9 hours 40 minutes
- 07:35 The switches of the RQF and RQD of sector 23 have cooled down and we go for the precycle
- 09:00 injection, ramp squeeze
- 11:00 adjust & beam loss: UFO
- 13:00 injetion, new scheme for ALICE (beam 1 first)
- 14:00 stable beams, L0=6.5E33
- 15:30 beam dump: BLM alarm, broken optical connection
- 22:15 injection
- 23:00 ramp, squeeze, adjust
- 23:45 stable beams
|
8:30 meeting |
|
Mon 3 Sep |
- 00:08 Injecting
- 00:58 OFC crashed at the beginning of the squeeze. SIS dump. Expert
called. Core dump saved
- 02:00 Filling and verification of the behaviour of the orbit and tune
feedback.
- 03:25 Stable beams #3023. Initial luminosities up to 7.1x1033
cm-2s-1
- 03:28 Lost cryogenics in sector 78. QRL vacuum gauge spurious reading
and triggering closure of cryo valves on DFB
- 07:10 Access in point 7 for replacing vacuum PLC in IP7
- 11:10 Start precycle after accesses various
- Afternoon: MCOX and skew octupoles checks in shadow of 18kV cable intervention in SPS
- 20:30 Stable beam
|
08:30
meeting |