Nine o'clock meetings on the weekend at nine o'clock.
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Day
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Summary
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Link to report from morning meeting
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Monday 28th March
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- 06h10:
Beams dumped for technical stop. Requested 1.38 TeV
luminosity running completed.
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8:30 meeting
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Sunday 27th March
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- 10h02:
Stable beams continued. vdM scans. Length
calibrations.
- 16h59:
Beam dump. Delivered 21h 39min of 1.38TeV physics in this fill.
Spontaneous LBDS trigger.
- 18h15:
Transfer line reference measurements before technical stop.
- 19h45:
Injection for next 1.38 TeV fill.
- 21h16:
Stable beams. 1.38 TeV.
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9:00
meeting
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Saturday 26th March
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- 10h35:
Power converter RB.A78 intervention completed.
- 16h15: Next 1.38 TeV
attempt
- 18h20: Stable beams. Fill #1653.
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9:00
meeting
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Friday 25th March
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- 01h30:
Collimation completed and qualified.
- 02h00:
Beam dump tests.
- 06h10:
Stable beams at 1.38 TeV.
- 09h03:
Beam dump. One bunch dropped too much in intensity and gave BPMS
interlock (dump protection).
- 10h36:
Injection. Bunch length (too long, > 1.7ns) giving injection
problems. SPS working. Improved but not fully solved. SIS interlocks
because of timing mismatch of BPM’s (old acquisition stamp).
Solved by SIS reboot.
- 12h14:
Abort gap cleaning made operational. Update BI-QP fixed display.
- 14h11:
Injection for physics.
- 14h23:
Trip of RB in 81. Water problem on bridge B (Thyristor
bank). Access required.
- 17h55:
Injection.
- 19h05:
Ramp.
- 20h03:
Stable beams. Fill #1651.
- 22h37:
Beam dump: One bunch dropped too much in intensity and gave BPMS
interlock (dump protection).
- 23h31:
Trip power converter RB.A78. Accesses and repair.
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8:30
meeting
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Thursday 24th March
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- 05h30: Parasitic
studies on leveling by vertical beam-beam separation in IR8
- 1647 dumped around
10:30
- Setup for 1.38 TeV -
couple of accesses required
- Collimator setup
starts late evening
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8:30
meeting
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Wednesday 23rd March
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- 06h10: Programmed
dump.
- 07h54: Injection.
200b.
- 08h39: Ramp.
- 09h18: Stable beams.
2.4e32 lumi.
- 09h32: Beam dump due
to RQTL11.R6B1 trip. EPC and CV
intervention in PM65. Change of water manifold in PC rack. Rebooting
BLM crates (missing/broken NFS mounts). New version of LSA with
improvements for smoothing (K) in ramp and physics (Greg). Collimator
dry rampof collimator functions for 1.38 TeV. PNO.a3 test on RQTL11.R2B2. QH power supply
discharging on dipoles of S45 (C19L5) -> fixed with access. RF tests
on cavity 4B2.
- 18h35: Precycle.
- 20h27: Injection.
- 21h08: Incorporation
problem.
- 21h42: Ramp.
- 22h20: Stable beams
#1647. 2.56e32 lumi.
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8:30
meeting
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Tuesday 22nd March
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- 05h05: BPM controls
problem
- 11h00: Beam back
- 12h10: Stable beams
Fill 1644. 136 bunches. Initial luminosity 1.6e32.
- 18h00: beams dumped
- 19h12: Starting
filling for 200 b
- 21h15: Stable beams fill 1645, 200 bunch,
initial lumi ~2.5 e32 (emittance
~2.4 micron)
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8:30
meeting
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Monday 21st March
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- 06h00: End of fill
#1640: 3.7 pb-1.
- 06h14: RB S12 and S23
tripped before loading rampdown table, active
filter. MPE piquet. Fip_Com_Lost for both
RBs... Piquet called again.
- 09h18: Ramp down of LHCb and ALICE dipoles and compensators. Ramp down
of ALICE solenoid.
- 09h27: Recovered from
RB trips. Prepare for injection while magnets ramp down.
- 09h50: Problems in PS.
Mains down in SPS.
- 10h30: Total voltage
INTLK reduced to 3.5 MV (P. Baudrenghien).
- 10h33: Injection.
- 11h49: Start ramp.
Beams dumped from false collimator interlock.
- 12h34: Release of the
new FGC software to fix the RF trip problem of two days ago (S. Page).
Deploy fix for low level collimator controls software (A. Masi).
- 13h08: Problem with
the ADT: the check for the injection settings is failing. W. Hoefle verifying.
- 13h18: Injection 136b.
Large oscillations at the injection of SPS (PS not stable): larger emittances (2.3-3.8 murad-m)
with respect to nominal.
- 14h38: Start ramp.
- 15h13: Stable beams.
- 15h13: LHC fast BCT
phase tuning done (J.J. Gras).
- 21h45: Beam dumped by
EIC.
- 21h49: Ramping up LHCb and ALICE magnets.
- 22h39: Injection.
- 23h19: SIS/controls
problem (JMS)
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8:30 meeting
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