| Day |
Short
summary/plan |
Link to reports from 8:30 and 17:00
meetings |
| Monday July 5th |
- Stable beams continued...
|
Report from 8h30 meeting |
| Sunday July 4th |
- 00h46: Stable beams.
- 01h35: Beam dump due to trip of RD1.LR1 from a glitch on the electrical network. Ramp down and precycle.
- 03h21: Injection.
- 04h23: Ramp started.
- 05h09: Flat top.
- 06h23: Stable beams.
- 15h21: Adjust mode for switch on of transverse damper.
- 16h34: Stable beams. Transverse damper is on. Vernier scans.
- Beam uptime (until 14h45): 13h30
- Stable beams (until 14h45): 9h51
|
Report from 8h30 meeting |
| Saturday July 3rd |
- 1h23: Threshold increased. Recycling
Could not switch ON-STANDBY RB.A81. Calling TE/EPC piquet.
- 3h04: Access PM85.
- 5h20: Problem solved. Coming from 18 kV.
- 5h26: QPS problem 6-7.
- 6h40: Precycling.
- 8h22: Injection.
- 9h20: Start of ramp. 7 x 0.9e11 p per beam.
- 10h05: Beam dump due to emittance measurement (wire scan) at 3 TeV: BLM threshold exceeded. Ramp down and precycle. Selected BLM thresholds increased by using monitor factor (BLM team).
- 11h52: Loss of QPS OK on RCO in S56 and QQT13.L6B2/B1.
- 12h29: RQT13.L6 and R6 trip for both beams. RCD and RCO in S56 and 67 trip while trying to sort out the QPS issue.
- 12h34: Recycling affected circuits.
- 13h29: Injection.
- 13h59: Trip of sector 8-1.
- Beam uptime (until 14h30): 2h10
- 14h05: Access. QPS board changed for RB11.R8.
- 18h09: Injection. Work on transverse emittance blow-up.
- 20h26: FMCM trip on the MSD due to glitch.
- 20h51: Injection. Work on transverse emittance blow-up.
- 22h27: Ramp started.
- 23h16: Flat top.
- Beam uptime: 7h55
- Stable beam: 0h00
|
Report from 8h30 meeting |
| Friday July 2nd |
- 1h31: Injection.
- 3h04: Ramp started.
- 3h57: Flat top. Issues with closure of separation bumps.
- 7h32: Beam dump.
- 9h43: Loss response checks in IR3.BLM response for injected beam hitting TCP and TCLA. Lost QPS OK on RD2.R5. Calling MP3. Masked.
- 10h34: Prepare for access in IR5: RD2.R5 QPS.
- 12h18: Access finished. Precycling.
- 14h01: Beams injected. 7 times 1e11 p per beam.
- 15h17: Start of ramp.
- 16h06: Flat top.
- 17h30: Stable beams.
- 18h13: Beam dump with beam-beam induced instabilities. Rampdown and precycle. BLM intervention to change a card in SR6 on surface.
Problem with RSD2.A81B1, the QPS has lost communication. RCO.A56B1 tripped during the ramp down.
- 20h30: Injection.
- 22h12: Ramp started.
- 22h52: Beams dumped in ramp, due to loss of sector 81. Ramp down and precycle.
- Beam uptime: 12h30
- Stable beam: 0h43
|
Report from 8h30 meeting |
| Thursday July 1st |
- 02h56: Stable beams.
- 07h30: Adjust mode. Collimators moved.
- 07h41: Stable beams.
- 10h38: Adjust mode. ALICE spearation changed to adjust luminosity.
- 11h51: Setup of TCT's in IR2 for new separation orbit.
- 14h53: Beams dumped with loss map by crossing 1/3 resonance.
- 15h33: ATLAS access. LHCb access.
- 19h13: Injection.
- 20h31: Ramp started. Beams dumped with collimator interlock. Recover. Recyle. PS problems.
- Beam uptime: 17h00
- Stable beam: 7h31
|
Report from 8h30 meeting |
| Wednesday June 30th |
- 00h23: Main Power Supply failure in SPS.
- 04h46: SPS recovered. Beam injection into LHC.
- 05h22: Start ramp with 3e11 p per beam. 15% of beam 2 lost during ramp (chromaticity). At 3.5 TeV losses for beam 1 when collapsing separation.
- 08h15: Stable beams.
- 10h37: Beam dump. Voltage divider problem for dilution kicker. Possible to continue after beam dump expert masked some redundant channels. However, a GTO is broken and will require 1/2 day access at some point. For the moment operation can continue.
- 10h47: Rampdown and precycle.
- 12h52: Injection setup.
- 13h49: Transverse damper studies.
- 15h08: BPMS studies.
- 15h21: Thunderstorm. Trip of sectors 12, 23, 34, 45, 56 + LHCb and ALICE dipoles + collimators. Recovery and precycle.
- 20h45: Beam back. No QPS-OK from RCBXV2.R2. Lost QPS-OK from RB.A67, RQD/RQF.A67. Kick response measurements.
- 23h01: Ramp started.
- Beam uptime: 10h30
- Stable beams: 2h22
|
Report from 8h30 meeting
Report at the LMC |
| Tuesday June 29th |
- 00h04: Ramp started. Longitudinal blowup not active.
- 01h00: Requested beam dump. Ramp-down and precycle.
- 02h00: Fire alarm US15. Access.
- 04h40: Access completed. Start recovery.
- 05h27: Injecting pilot beams: large chroma errors. No beam from SPS for continuing. Pre-cycle.
- 07h23: Injection: 3 x 1.1e11 p per beam.
- 09h06: Start ramp.
- 10h37: Start squeeze.
- 11h56: Stable beams (fill 1185). New record luminosity of up to 8e29 cm-2 s-1.
- 16h15: Beam dump during thunderstorm. Rampdown and precycle.
- 17h45: Access in point 1 (QPS) and point 4 (wire scanner).
- 19h00: End of access. Recovery and prepare for injection.
- 20h44: Controls problems due to AFS failure.
- Beam uptime: 10h30
- Stable beam: 4h19
|
Report from 8h30 meeting |
Monday June 28th |
- Recovery from cryo stop that happened Sunday, June 27th, 15h33.
- 10h40: Access IR4 for wire scanner. Access in CMS. Access in 7-8 for BLM intervention.
- 12h40: Tests of squeeze sequence without beam in simulation mode. Completed successfully.
- 15h15: Cryo OK back.
- 18h30: Preparation for injection completed (pre-cycle, RF, injection kickers, ...). Injection.
- 19:00: Lost cryo in 3-4 (level regulation problem in DFBAF_O7R3). Waiting for cryo OK to start another precycle.
- 19h46: Pre-cycle.
- 22h30: Injection. Corrected bump in IR6 (MCBCH.8L6.B2 and MCBYH.5R6.B2).
- 23h50: Fire alarm US15. Reset.
- Beam uptime: 1h50
|
Report from 08:30 meeting
|
