LHC 2010 - latest news

Week 48: Machine coordinators: Mike Lamont - Jorg Wenninger

Main aims of the week:

LHC coordination vistar

Day

Summary

Link to report from morning meeting

Monday 6th December
  • Stable beams.
  • Last dump of 201 at 18:00.

Slides from 8:30 meeting

Sunday 5th December
  • Beam back around 6:30.
  • Filling for physics, ion beam intensity so-so.
  • Stable beams fill 1538,  L = 1.4 10^25 Hz/cm2, 137 bunches.
  • 11:20 lost S12.
  • Access
  • Stable beams

Slides from 8:30 meeting

Saturday 4th December
  • Issues with a cryo valve in S12 over night. Cryo team found a work-around without access.
  • First beam out of the ion source around 08:00. Tuning source..
  • 09:30 beam in the SPS.
  • 10:00 beam back in the LHC. Setting up 8 bunch injection.
  • 14:00 Stable beams fill 1536, L = 2.2 10^25 Hz/cm2, 137 bunches.
  • Beam dumped at 20:30, 0.4 ub-1.
  • Access required for RQ6.R5.
  • Problem with access system (EIS) delayed access.
 
Friday 3rd December
  • 08:30 decided to refill ion source as it was showing clear signs of reaching the end of its life.
  • No beam before saturday morning.
  • Pre-cycle test - need access for RQSX3.R1.
  • Siren broken in UX15, problem with BIW.

Slides from 8:30 meeting

Cryo status (S. Claudet)

Thursday 2nd December
  • 01:30 Cold compressor failure at pt4, beams dumped.
  • Access.
  • 8 bunch ion beam down TI2 and TI8.
  • Cold compressor back on at 12:00.

Slides from 8:30 meeting

Wednesday 1st December
  • Good early morning re-fill and back in stable beams by 8:30 Wednesday 2.8 10^25 Hz/cm2
  • Two accesses overnight Tuesday to Wednesday (QPS, power converter)
  • 08:00 Stable beams fill 1534, L = 3 10^25 Hz/cm2
  • Access for QPS S23 around 16:00
  • Stable beams fill 1354,  L = 2.5 10^25 Hz/cm2.

Slides from 8:30 meeting
(rather poorly attended - bit of snow out there)

Tuesday 30th November
  • Beams dumped around 22:10
  • Stable beams fill 1533, L = 2.5 10^25 Hz/cm2, VdM scans

Slides from 8:30 meeting

Monday 29th November

  • Difficult filling - missing TT60 BCT.
  • 14:00 stable beams fill 1530, L = 10^25 Hz/cm2 due to large emittance on B2V, not so high I.
  • 16:30 dump and refill.
  • 20:15 dump beam just before collisions - OFB was left on during collision BP.
  • 00:00 Stable beams fill 1522, L = 2.5 10^25 Hz/cm2

Slides from 8:30 meeting