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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 15th November
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- 00h30: Beam dump.
- 01h30: Injection. 121b
x 121b.
- 07h42: Stable
beams. Fill #1492. Reach 2.5e25 cm-2 s-1.
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Slides
from 8:30 meeting
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Sunday 14th November
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- 00h32: Stable
beams. Fill #1490. 121b x 121b. Exceed 2e25 cm-2 s-1
luminosity.
- 06h26: Lost QPS-OK in
Q9.L7 (SEU suspected). Same location as yesterday but different problem:
FIP communication. This type of problem occurred yesterday in Q9.R7 and
is not addressed by firmware upgrade deployed during Saturday day
accesses.
- 08h05: Beam dump due
to power interlock in L5. Ramp down.
- 09h00: Accesses for
QPS problem in L7 and switch of RQTL11_L5B1 board.
- 12h05: Recovery from
access.
- 13h53: Injection.
Settings for reduced transverse blow-up in the PS, that should
give smaller emittance (3 -> 2.1 –
2.8 um).
- 16h49: Start ramp. 121
x 121 bunches. Long. blow up used to keep bunch length at or above 1ns.
- 18h05: Stable
beams. Fill #1491. 121b x 121b.
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Slides
from 9:00 meeting
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Saturday 13th November
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- 01h04: Stable beams. Fill #1489. 69b x 69b. On IR7L and IR7R, each one
QPS equipment tripped (SEU).
- 10h44: Beam dump by
request. Preparing QPS accesses to reset QPS equipment L7 and R7. Decide
to go for firmware upgrade. Will take some hours.
- 11h45: Machine
prepared for accesses: Sectors switched off and locked: 45, 56, 67, 78,
81. Vac valves closed in UJ67 and UJ83.
- 11h52: Access started
in point 6
- 12h16: In response to
request from the tunnel, TI asked to switch on lights in the half octant
left of IR7. ODH and evacuation alarms triggered by lights. Tunnel
sections evacuated. Fire brigade into tunnel.
- 19h25: Firmware
upgrade to improve the tolerance to SEUs completed. Closing the LHC...
we leave the lights on.
- 21h40: Injection 121
on 121. Long – around an hour. BPM for dump checked and OK.
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Slides
from 9:00 meeting
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Friday 12th November
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- 00h53: Stable beams. 68 on 69.
- 06h41: trip of RQD.A23
- 06h49: trip of sector
67 when loading the rampdown start BP (SEU?).
- 09h49: Access for QPS
problems. See Saturday report for details. One problem likely related to
SEU (single event upset).
- 19h04: QPS accesses
finished. Starting recovery.
- 20h52: Injection. RF
voltage modulation setup.
- 22h42: Start ramp. 69b
x 69b.
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Slides
from 8:30 meeting
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Thursday 11th November
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- 00h03: Recover and precycle.
- 00h56: Trip
RQT13.L2B2. Piquet. Precycle.
- 03h14: Injection.
Missing frequently injection because of wrong bucket. During the
injection for physics, we got one train shifted by one RF bucket not
intercepted by the SPS BQM. So we dumped and refill.
- 05h24: Start ramp. BCT
logging stopped working. 69b. Low intensity.
- 05h32: Beam dump.
RB_ENERGY_CHECK SIS interlock. Same event as in the morning of the 27th
of October. XPOC failed also because the energy reading is -1 GeV.
- 05h56: Trip again
RCBXH1.R2. Access.
- 07h08: RCBXH1.R2 fixed.
Board bypassed. Work through access items from standby list. Access
planned until 11h00.
- Problems during
access: lights on à ODH
alarm, patrol lost, problem in 81, PP60A (earth fault in a 18 Kv cell à
PC problem), lights off à ODH alarm,
various trips, …
- 16h35: Access
finished. Recover and precycle.
- 18h17: Ready for
injection.
- 18h23: No beam from
injectors: LEIR/PS problem. The beam is not extracted. LHC had
mastership.
- 20h08: Injection.
- 21h00: Beam presence
flag problem.
- 21h30: Timing missing
- 23h50: Start ramp
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Slides
from 8:30 meeting
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Wednesday 10th November
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- 12h30: Adjust mode for
end-of-fill study.
- 13h21: Rampdown and precycle.
- 14h13: Problem with
timing card in RF front end at SPS.
- 14h39: PS RF cavity
down now.
- 15h10: Injection.
- 15h45: Tested dynamic
change of reference for the Tune-FB and fitter window.
- 16h19: PS RF problem.
- 17h26: Injection.
- 18h28: Start ramp. 69
bunches.
- 18h41: RCBXH1.R2
tripped, beam dump.
- 21h31: Recover and precycle.
- 21h48: RCBXH1.R2
tripped again. Access. Connector? Old card.
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Slides
from 8:30 meeting
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Tuesday 9th November
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- 01h01: Stable beams. Fill #1483.
- 10h00: Beam dump. Ramp
down and precycle.
- Injection studies with
4 x 500 ns from SPS
- Test ramp - new
collision beam process
- 22h50: Stable beams with 17 bunches, 16 colliding pairs fill#
1485 - initial lumi 3.5e24 cm-2s-1.
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Slides
from 8h30 meeting
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Monday 8th November
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- 8h43: Injection.
- 9h52: Start ramp. 2b
of 1e10 per beam.
- 11h20: Stable beams. First for ions. Fill #1482.
- 12h57: Retracted
TCTVB’s in IR2 to +- 23 mm (manually). Avoids shadowing problem
for ZDC.
- 14h19: Some orbit
optimization: explains collimation issues observed?
- 19h31: Adjust
handshake starting.
- 20h00 in adjust. End
of fill loss map for reproducibility check. Loss map with TCTVB’s
in IR2 back in.
- 20h30: Rampdown and precycle. RF
adjustments.
- 22h20: Injection. Trip
of RF module 1B1. RF adjustments.
- 23h47: Start ramp. 5
bunches of 1e10 per beam.
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Slides from 8:30 meeting
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