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Date
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Summary
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Link to report from morning meeting
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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
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08:30 meeting |
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Sun 2 Sep |
- 01:23 STABLE BEAMS #3020. Initial luminosity 6.9x1033 cm-2s-1
- 06:17 RQTL7.L7B2 trip (QPS – requiring QPS reset – SEU?). 87 pb-1 in ~5 h
- 07:13 Start filling
- 09:08 STABLE BEAMS #3021. Initial luminosity 6.6x1033 cm-2s-1
- Beam dump initially planned for ~20:00 delayed to 22:00 to allow MKI
B1 kicker temperature reduction
- 22:05 OP dump (167 pb-1 in ~13 h). Injection delayed due to MKI2
temperature
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09:00 meeting |
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Sat 1 Sep |
- 08:03 Operator dump, integrated lumi’s 173 pb-1
- 08:40 Trip of RQX.R1 during ramp down, same as yesterday afternoon
during ramp up
- 09:00-10:00 Test cycle for the triplet R1. OK from PO piquet to
continue operation
- 11:35 STABLE BEAMS #3019. Initial luminosity ~6.64x1033 cm-2s-1
- 17:10 Trip of RQT13.R7B1 (QPS - likely SEU). ~92 pb-1 in 5.6 h
- In parallel TCTVA.4R5.B2 problem.
- 21:13 After several attempts to reset the QPS controller for
RQT13.R7B1 remotely access for QPS board replacement
- 22:17 access finished. Precycling
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9:00
meeting |
|
Fri 31 Aug |
- 00:03 Stable beams #3016. Initial luminosity ~6.7x10^33 cm-2s-1.
- 08:59 Electrical network glitch - Beam dump - ~125 pb-1 in 9 hours.
- 11:36 At the end of the pre-cycle another electrical problem appeared
in point 8
- Problems with the beams from the BOOSTER and a vacuum spike in the SPS
extraction kicker (LSS4)
- 14:33 Injection physics beams ¨Large emittances from the injector
chain, up to 2.6um for B2V.
- 15:33 Lost beam at the very end of the ramp (3.9 TeV), Trip of IT.R1.
- 18:55 Stable beam fill #3018, initial lumi 6.6e33 cm-2s-1
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8:30 meeting |
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Thu 30 Aug |
- 01:00 Cryo Start IP2 back
- 01:29 LHCb dipole tripped due to electrical perturbation
¨OK for restart…
- 02:46 POPS back in the PS
- 08:30 Access for vacuum in IP4 to get vacuum equipment
out.
- 11:00 Vacuum intervention on BSRT finished
- 12:14 Problems to restart RF module M2B1. Piquet called.
Access required.
- 13:40 Start injection fill 3014 - pilot ramp for LHCb
polarity check (2x6 on 2x6 bunches)
- 16:30 Setting-up completed- OP dump
- 17:25 Filling #3015. Problem with TI2 power converter
- 18:49 TI2 Ok. Filling
- 20:39 Stable beams #3015. Initial luminosity ~7x10^33 cm-2s-1.
- 20:39 Trip of RQTL7.R7B2. Beam dump
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8:30
meeting |
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Wed 29 Aug |
- 04:00-07:00 Octupole polarity verification on MOD.A23.B1 with pilot
bunch. Polarity OK.
- 07:30 start of access for intervention on BSRT
- 11:00 BSRT mirror and arm removed. Pumping down.
- 13:21 Compensator in Point 2 down
- 21:32 A first attempt to connect the SR2 TCR compensator caused the
trip of the filter and consequently of the IP2 cold compressor. ¨Also
problems RB12 and RB23
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8:30
meeting |
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Tue 28 Aug |
- 02:09 Stable beams fill #3011, initial lumi 7.4e33 cm-2s-1
- 14:09 End of fill #3011. OP dump. ~175 pb-1 in 12 hours.
- Afternoon: issue with BSRT mirror beam 2. Investigations by BI
- 19:00-21:00 BI access for BSRT issue
- 23:00-02:00 Access for vacuum team for Neon Injection in preparation
of intervention on BSRT.
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8:30 meeting |
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Mon 27 Aug |
- 00:50 Stable beams fill 3007, initial Luminosity ~6.8E33
cm-2s-1
- 03:40 Beam dumped by OP due to cryo problem in Pt4, integrated L ~
56 pb-1.
- Cryo compressor off in Pt4.
- 08:00 Start accesses
- 16:00 Cryo conditions back
- 17:00 Cycling the magnets
- 18:30 Injecting batches of 6 for steering
TI2, seems ok.
- 19:18 Inject for physics
- 19:30 No beam anymore from SPS – dump half
way filling Extraction septum problem – call specialist
- 21:47 Injecting for physics again
- 23:00 Stable beams fill #3009,
initial lumi 7.3e33 cm-2s-1
- 23:27 Beam dump – UFO 5L4
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8:30 meeting |