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Date
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Summary
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Link to report from morning meeting
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Monday 21 May |
-
Access for switching temperature probe DFB L7.
|
8:30
meeting |
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Sunday 20 May |
- 05:20 programmed dump, 193 pb-1 collected
- 05:37 electrical glitch, 4 sectors lost
- 11:38 QPS interventions to recover finished. LHC closed. Precycle.
- 13:09 Injecting
- 14:31 Fill #2648 Dump at flat top. Electrical glitch. FMCM.RD1.
- 18:15 Stable beams fill #2648, some losses when going into collision.
- 23:47 Beams dumped. Lost Cryo Maintain L7, temperature sensor fault on
RQTL10. Access.
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9:00
meeting |
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Saturday 19 May |
- 04:39 beam dump due to BMPs
- injection delayed due to PS, problem with extraction kicker (again)
- 9:16 injection for physics, new filling scheme
- ramp-squeeze-adjust without problems
- 10:24 stable beams, single bunch losses < 20% !! it works !!
- 10:52 dump, fake alarm from BLM (spurios trigger)
- 13:14 stable beams, even better single bunch losses, < 2 %
- long run
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9:00
meeting |
|
Friday 18 May |
- 00:40 On ramp RF Module M1B2: crowbar fired
- 01:53 Inject
- 02:38 Adjust beam process to optimise collision point in
LHCb
- 03:09 Dump by operator
- 04:54 Optimise collision with 2 x 84 bunches
- 05:18 Dump by operator
- 06:29 Again RF the module M1B2: crowbar fired. Preparing
access
- 12:14 injection for physics
- 13:56 stable beams, some losses in beam1, after bringing the beams into collision
- long fill, int. lumi = 170pb-1
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8:30
meeting
|
|
Thursday 17 May |
- 01:11 Fill #2633 dump in squeeze arc circulator load
channel Ad1B
- 03:16 Fill #2644 Stable beams, lumi 5.2e33 cm-2s-1
- 04:38 Dumped by interlock on BPMS, loosing intensity on
some bunches
- 06:48 Fill #2635 Stable beams, initial lumi 5.5e33
cm-2s-1
- 11:57 Dumped by interlock on BPMS, again one bunch b2
going unstable.
- 12:34 Error on the module H2B2 of the ADT.
- 14:15 Injecting beam for test ramp to find LHCb head on
collisions
- 15:13 Injector chain down: POPS in PS
- 17:47 POPS back
- 18:30 Start ramp with 24 bunches per beam
- 18:38 Dump in ramp at 2.5 TeV due to SIS interlock. Not
clear why.
- 19:32 Injecting probe
- 19:35 Collimator - BIS interlock in TI2, same as last
days. Try to unblock.
- 22:09 Start access in TI2 to fix collimator - BIS
problem.
- 22:56 Cycling the machine
|
9:00 meeting |
|
Wednesday 16 May |
- 03:05 beam dump, RF fault crowbar problem on module M1B2
- 06:09 Another crowbar at injection.
- Access for RF; problem Beam Imminent Warning point 6
- 12:30 Machine closed. Again RF crowbar while arming the BIS loop.
Diagnostics revealed that there was a problem on a HV cable between the
power supply and the klystron of line 3B2. The cable was replaced.
- 14:50 Cannot close because of problem again with Beam Imminent Warning
point 6.
- 15:40 BIW problem solved.
- 16:10 SPS main power supply down
- 18:35 SPS is back
- 20:55 Stable beams fill #2632, initial lumi 5.0e33. LHCb negative
polarity
- 21:03 Beams dumped on BPMS interlock.
- 21:41 BIS interlock from SR2.INJ1.1 In 8: Coll Motors. Known problem.
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8:30
meeting |
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Tuesday 15 May |
- 06:07 Beams dumped, trip of ROF.A67B1.ĻInt lumi 97 pb-1.
Access.
- 09:19 End of access, precycling.
- Problems with TT60 power converter and data base /
communication
- 12:06 Injecting
- 13:15 Scraping with TCP with 1380 bunches
- 13:36 Start ramp
- 14:29 Stable beams fill #2629, initial lumi 4.1e33.
- 20:22 scheduled beam dump
- 22:55 stable beams fill #2630, initial lumi 5.4e33
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8:30
meeting |
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Monday 14 May
|
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8:30
meeting
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