|
Date |
Summary |
Link to report from morning meeting |
| Mon 21st January |
- injecting 338 bunches/beam fill 3479
- 8:13 dump during cogging
|
08:30 meeting
Ion summary (J.Jowett) |
| Sun 20th January |
- 2:50 - 10:30 3 fills for off-momentum loss maps and asynch dump
- 10:50 - 12:45 asynch. dump test and B2 loss maps at injection
- 15:08 stable beam p,Pb fill 3474, 1.5 hours; 13 bunches/beam
- change to 'ADJUST': fixed and re-calibrated BSRA; verified that the
abort gap cleaning is working
- Dumped beam 2 in order to do loss maps with B1 only: B1H, B1V and
negative off-momentum loss maps in collision
- 19:00 start set-up of p and Pb trains
- 21:00 trains in the LHC 96 p and 120 Pb bunches
- 21:22 dump by SIS during ramp due to missing BPM data
|
09:00 meeting |
| Sat 19th January |
- 01:30 Started roman pot alignment in collision
- 02:40. Beams dumped by wrong step in ALFA roman pot alignment
- 03:51 Start injection – No ion beam from SPS. Continue with B1
- 04:30-07:30 Loss maps at injection with B1
- 06:00 Ion beam available but problem with Beam Dump B2 ==> expert
called. Access required to replace PLC.
- 08:40 access
- 09:30 Access finished
- 11:17 – 12:50 RF problem with ion injection (re-phasing), due to a
disabled timing
- 13:22 - 19:17 fill for RP set-up followed by betatron loss maps and
off-momentum loss maps at collision with RP in
- dry-run and correction of sequence for RP to physics settings
- 21:45 - 1:49 fill with betatron loss maps at flat top, squeezed and
separated and in physics condition with RPs in
|
09:00 meeting |
| Fri 18th January |
- 01:45-05:30 Injection of protons and ions, capture, steering
- 05:30-07:20 Cogging, squeeze
- 07:20-09:30 go in collision
- 09:20 Collisions in all IPs
- 09:30 – 10:24: Orbit optimization, FBCT re-phasing, collimator
alignment check for TCSG.6L7.B2
- 10:28-14:50. Trip of RSF1.A56B2 during pre-cycle, invesitgations and
access to repair.
- 15:30-17:30 Filling
- 18:30 Cogging at flat-top completed.
- 18:30 - 19:20 Loss maps at flat-top (betatronic)
- 19:20-19:40 Squeeze
- 19:40-20:46 TCT alignment
- 20:46-23:00 Loss maps and some alignment verifications
- 23:00 Colliding in all points
- 23:50-01:25 TCT alignment and loss maps in collision
|
08:30 meeting |
| Thu 17th January |
- 06:00 cryo back start pre-cycle
- 07:20 Injection
- Adjust beam in the injectors and set-up oorbit acquisition
- 12:30 End of ramp
- 15:00 First set of loss maps at flat-top completed
- 16:00 Collimator alignment in point 7 completed
- 17:30 Second set of loss maps completed
- 17:47 Squeeze completed in one go
- 18:00-24:00 IR2 aperture measurement
|
08:30 meeting
A. Suraci /
cryo |
| Wed 16th January |
- 00:03 TDI OK after several movements by piquet (reason fro
problem unclear)
- 03:36 No way to fix problem with Beam Imminent Warning sirens. Manual
trigger for the night.
- 04:13 B2 injection
- 04:13 lost cryo conditions in sector 34/45 (ciommunication problem)
- 06:30 Communication problem identified (faulty network switch). IT
piquet called.
- 09:30 IT piquet accessing. BIW siren problem being investigated by
expert.
- 11:30 Second access required for network switch
- 12:30 Cryo communication problem in point 4 fixed
- 13:17 Trip of the cold compressor in point 4.
- afternoon / evening: problems reconnecting cryo in Pt4
|
08:30 meeting
F. Duval on Power glitch |
| Tue 15th January |
- 4:12 off-momentum optics at beta*=0.8m
- 08:28 Power glitch due to a short on 18 kV cable in Meyrin. Al sectors tripped. Cryo in P18 affected.
- Accesses during the day (CV, ALICE, CMS, ventilation doors)
- 20:30 Problem with sirenes in point 5 and 6. Not possible to close the machine.
Expert called.
- 21:00 Cryogenics recovered
- Problem with TDI movement. Expert called.
- 23:30 Undulator trip (RU.L4). Loss of cryo conditions in the
matching section L4.
|
08:30 meeting
R.Versteegen |
| Mon 14th January |
- 02:20 beam loss due to instabilities
- 03:15 new injection
- 04:25 beta sqeeze, 80cm reached, optics checks
- 09:20 fixing issues at injection
- 13:10 set-up injection for 200ns trains of protons
- 16:40 - 18:20 access for ALICE (and BGI in parallel)
- preparing injection of Pb trains
- 20:00 - 22:20 no beam from SPS
- 22:20 optics with experiment bumps on-momentum during squeeze and
collision beam process
|
08:30
meeting
F.Duval
|