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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 20 Aug |
- 1:00 in addition: PS problem POPS earth fault
- 7:30 injector problems solved
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8:30
meeting |
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Sun 19 Aug |
- 5:14 Beams dumped by OP. End of fill #2984 223 pb-1 in 19 h
- 8:30 injecting physics beam fill #2985 (delayed by MKI2 temperature
interlock)
- 9:15 beams dumped during ramp by trip of LHCb dipole
- 11:00 Intervention on LHCb dipole power converter completed Filling
#2986 delayed by RF problem in the SPS
- 11:54 Dump during injection due to BLM in point 2 close to inection kicker
(UFO?) after injection
- 12:00 Filling #2987
- 13:23 STABLE BEAMS #2987. Initial luminosities ~7.1x1033
cm-2s-1.
- 13:59 RF Module M2B2 tripped (main coupler vacuum). Beam dump. ~15pb-1
in 0.6 h.
- 14:42 Trip of RQ7.R4 (HTS interlock) ==> trip of the arc 45
- 15:44 OK from RF piquet to restart Module M2B2
- 16:08: Precycle
- 17:23 ready to inject but RF problem in the PS (20 MHz cavity)
- 18:46 PS RF OK but cryo intervention in P18 (PLC) ==> no injection/ramp on request of cryo operator
- 20:47 Cryo OK but PS RF problem again (20 MHz)
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09:00 meeting |
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Sat 18 Aug |
- 07:31 Beams dumped by OP. End of fill #2983 195 pb-1 in 16 h
- 10:04 STABLE BEAMS #2984. Initial luminosities ~7.4x1033
cm-2s-1.
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09:00 meeting |
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Fri 17 Aug |
- 00:22 STABLE BEAMS #2980. Initial luminosity 6.6x1033 cm-2s-1
- 03:07 LBDS trigger (MKB vacuum pump tripped). 55 pb-1
- In the mean time further work on PS emittance. Now very good.
- 04:11 Filling (2981). 1.59x1011 p/b
- 06:00 STABLE BEAMS #2981. Initial luminosity > 7.1x1033
cm-2s-1
- 07:00 QPS trigger on RQT12.R1B2.
- 09:00 Filling #2982. Still very good emittances.
- 09:52 Beam dump during the ramp. SIS interlock on RB energy check
- While ramping down PS access for RF cavity then access for ALICE,
ATLAS, CMS + other 2 pending accesses for the machine.
- 13:20 PS/SPS ready but still CMS access.
- 13:45 CMS out.
- 14:13 injecting (2983)
- 15:40
Stable beams #2983: Initial luminosities close to 7x1033 cm-2s-1 . Losses on some bunches (B2 mostly) after end of squeeze
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8:30 meeting |
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Thu 16 Aug |
- 07:07 End of fill #2976. ~150 pb-1 in 11.3 hours. OP dump
- 10:12 stable beams fill 2977; 1374 bunches; 1.56E11 p/b;
initial lumi ~6.3E33 cm-2s-1
- 10:13 beam dump: power converter ROF.A81B2
- access to change power module, ATLAS access in the shadow
- 15:06 stable beams fill 2978; 1374 bunches; 1.59E11
p/b; initial lumi ~6.6E33 cm-2s-1; integrated lumi
- 16:23 beam dump: vacuum interlock 7R7, 3 valves closed
- access for QPS
- 19:18 fill 2979
- 20:24 Beam dumped during the ramp UFO at TCSG.4L6
- 22:00 Filling (2980). Intermittent problem at PS extraction (beam
driven onf 3rd order resonance at high energy).
- 23:00 Beam quality from PS OK.
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08:30 meeting |
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Wed 15 Aug |
- Night: Loss maps
- 06:00-09:30
Angulr alignment and verification TDI in point 8
- 09:00-10:49 Fill with 78 bunches for verification of the full cycle and collision optimization
- 10:49–11:39 STABLE BEAMS #2974. 78 bunches. 0.8 pb-1 in 0.8 h. OP dump after lumi optimization
- 16:00-16:31 STABLE BEAMS#2975. 480 bunches 4 pb-1 in 0.5 h. Trip of RQTL9.R7B1. QPS trigger (SEU?)
- 19:47 STABLE BEAMS#2976. 1374 bunches. L~6x1033 cm-2s-1 and 1.44x1011 p/b
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8:30 meeting |
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Tue 14 Aug |
- 02:00-03:30 Find collisions
- 06:00 Loss maps at flat-top and squeeze
- 08:00-09:30 Loss maps at injection
- 09:30-16:30 Injection and injection protection
setting-up (beam 1)
- 14:25 CMS solenoid back at nominal current
- 16:17 Undulator RU.L4 tripped. Trip of the corresponding matching section and lost cryo conditions
- 17:00 Cryo OK. Precycling
- 18:00-18:30 No beam from PS (POPS)
- 18:45 Filling for TCT alignment in collision
- 20:20-21:25 TCT alignemnt
- Loss Maps with Roman pots in position
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8:30 meeting
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Mon 13 Aug |
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8:30 meeting |