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Day
|
Summary
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Link to report from morning meeting
|
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Monday, 20th June |
|
08:30
meeting |
|
Sunday, 19th June |
- Cryo recovery ongoing
- Morning and afternoon: extraction tests to the first TED
and to the second TED for investigations on trajectory
stability in TI2
- Test of the BIS loops for 2 hours ==> no remaining
problem observed.
|
09:00
meeting |
|
Saturday, 18th June |
- 00:01h erratic injection oscillations in both beams, reason not known,
optimisation difficult
- 05:02h injection completed, start ramp
- 05:07h again dump due to BIC
- 07:00h injection, ramp, squeeze, lumi: stable beams
- 07:48h beam dump: BIC spurious interlock
- 08:30h access BIC repair
- 13:00 Intervention on BIC finished (replacement of optical fiber
receiver in point 8)
- 13:00-15:00 Large emittance beam in the SPS. Tuning of the machine
- 15:00-17:00: check of injection
- 17:00: Cryo problem in point 8
|
09:00 meeting
|
|
Friday, 17th June |
- 01:13h stable beams #1873. Initial luminosity ~1.1×1033
cm-2s-1
, Longer time spent at injection due to
inequalities in bunch intensity
- 02:06h Beam dump. Spurious trigger. End of
physics #1873. ~3 pb-1 in 50 min
- Fill #1874 lost due to RQTF.A78B1 trip at the beginning of
the squeeze (QPS trigger)
- 06:15h stable beams #1875. Initial luminosity
~1.05×1033 cm-2s-1
- 08:30h van der Meer scan in IP5, afterwards:
stable beams
- 14:04h beam loss, integrated lumi: 25.3 pb-1
, dump due to orbit excursion, reason unclear, in
coincidence trip of undulator and according loss of cryo in L4 and loss of
the60 A circuits in sector 12
- access for RF (coupler) and QPS (check undulator QPS)
- connect rf coupler alarms to the LHC dump system and test
it
- 18:00h precycle for restart
- 19:00h injection, ADT problem (HV)
- 22:00h IQC cash not working
- 24:00h HV trip of RF klystrons (klysrton 6b1 has to be
kept switched off)
|
08:30
meeting
RF beam
interlocks (A. Butterworth) |
|
Thursday, 16th June |
- 00:00h injection for physics
- 03:12h beam lost on ramp: UFO
- 04:36h injection, ramp, squeeze
- 07:20h stable beams #1872. Initial luminosity 1.1x1033
cm-2s-1.
- 14:50 Trip of Sector 81 (new QPS - QF- B11.R8). End of physics #1872.
~22 pb-1 in 7.5 h.
>1 fb-1 delivered in 2011 at 3.5 TeV
- 15:00 - 18:00 Access for QPS reset in Sector 12 and for
RF in point 4. Intervention on BIW in point 5. Access for LHCb.
- 19:00-21:00- 2nd access for QPS required
because of a problem on another board
|
08:30 meeting |
|
Wednesday, 15th June |
- 02:30-05:00 Replacement of relay for BIW in point5
- 05:00 - 11:00: Problems at injection (Beam 1
particularly). RE-tuning of the injection for B1 and B2
- 11:00 Again 400 V circuit breaker trip in
RR13.
- 11:00-19:00: Intervention by EL on the 400 V circuit
breaker and verifications on
the equipments connected to that.
- In the shadow access for:
- cryo valve control
connector in RE72
-
RF waveguides arc
detectors
- fire detection in UJ33
- ATLAS
- ALICE
- 60 A power converters
replacement
- Enabled BLM in TD62
- UPS control in US85
- 19:00-21:00 Problem with the Beam imminent
warning.
- 21:00-23:00 Injection verification
|
08:30
meeting |
|
Tuesday, 14th June
|
- 07:30 Stable beams.
Fill #1868. Initial luminosity 1.1x1033.
- 22:37 Trip of Sector 81. Lost Cryo maintain due 400 V
problem in RR13. End of physics
#1868 ~47 pb-1 in
15 hours
- 23:00 - 02:30 Access for: 400 V problem in UJ14, QPS card
replacement in Sector 23 and 67.
|
08:30
meeting
|