LHC 2010 - latest news

Week 24: Machine Coordinators: Gianluigi Arduini, Malika Meddahi

Latest plan: link PDF link XLS (version of 21 June, 21:30)

List of End of Fill studies (in work)

List of MD requests (in work)

Day Short summary/plan Link to reports from 8:30 and 17:00 meetings
Monday 21st June
  • Midnight - 3:00 : Controlled beam scraping before asynchronous beam dump.
  • 3:00 - 5:00 : Combo ramp down
  • 5:00 - 13:00 : 450 GeV LBDS setting-up and qualification
  • 13:00 - 15:00 : Combo ramp down
  • 15:00 - 01:00 : Inject 2bx2b (single_2b_1_1_1), ramp, squeeze, collapsed separation bumps, crossing angle IP1/5 at -100/100 urad - protection device qualification to continue
Report from 08:30 meeting
Serge Claudet presentation
Sunday 20th June
  • Recover from access for FIP repeater in RR17
  • ~noon - midnight: Inject 2bx2b (single_2b_1_1_1), ramp, squeeze, collapsed separation bumps, vernier scan, crossing angle IP1/5 at -100/100 urad -  TCTs setting up at 3.5 TeV -TCDQ -
  • midnight - 3:00 : Controlled beam scraping before asynchronous beam dump.
Report from 09:00 meeting
Saturday 19th June
  • ~ 9:00 - 10:00 : Exercise the mechanics of collapsed bumps in all IPs, switching IP1/5 to -100 urad
  • 10:00 - 12:00 : Ramp down combo
  • 12:00- 16:20 : Inject 2bx2b (single_2b_1_1_1)for TCTs setting up at 3.5 TeV, collapsed separation bumps, with crossing angle IP1/5 at -100/100 urad - dump beam due to LBDS internal fault (vacuum interlock)
  • 16:20 - 17:30 : Continue with beam1 to experience controlled beam losses on the 3rd resonance. Lost beam 1 due to interlock BPM in IR6
  • 17:30 - 20:30 : Ramp down combo - investigating collimator problem (won't go to injection settings)
  • Overnight : Refill and inject + ramp + squeeze + collapse bumps +  Vernier scan done at the exception of IP8 (and partially in IP2)
Report from 09:00 meeting
Friday 18th June
  • 05:00 - 14:00 : Beam preparation for TCT setting-up but at 9:00, trip on RB.A78 - Investigation and recovery - Collimator sequence tests - Damper checks
  • 14:00 - 15:00 : Damper tests with beams at 450 GeV for multi-bunches
  • 15:00 - 18:30 : Beam preparation for the next TCT setting up but beams were dumped at 3.5 TeV, squeeze at 7m due to trip of RB.A78
  • 18:30 - 00:00 : Ramp-down combo, access for RB.A78 - Pre-cycling - Linac RF problem - PS septum problem delaying the beam re-start
  • 00:00 - 02:00 : Preparing for optics measurements from injection to 3.5 TeV, squeezed optics.
  • 02:00 - 09:00 : Chromaticity measurements during the ramp and beta beat measurements during the squeeze - exercise  collapse of all separation bumps and bring crossing angle in IP1/5
  • NO 17:00 meeting
Report from 08:30 meeting
Thursday 17th June
  • ~midnight - 4:00 : Controlled longitudinal blow-up, 450 GeV, multi-bunches
  • 4:00-9:00 : Beam preparation for the next collimation setting up at 3.5 TeV, squeeze to 7m
  • 9:00 -11:30 : Collimator setting-up at 3.5 TeV, squeeze, 7 m, then 3.5 m, with separation on. Lost beam 1 while moving the collimators and lost beam 2 due to trip of RSD2.A56B1.
  • 11:30 - 13:30 : Ramp-down combo
  • 13:30 - 14:30 : Access for FIP communication in UA43
  • 14:30 - 17:00 :  Recovering from access
  • 17:00 - 21:00 : Beam preparation for the next collimation setting up at 3.5 TeV, squeeze to 7m
  • 21:00 - 03:00 TCT collimator setting-up at 3.5 TeV, squeeze, 7m, then 3.5m, with separation on,TCT setting-up - TCDQ setting-up
  • 03:00 - 5:00 : Ramp-down combo - Test run with new collimator settings during the ramp - squeeze to 3.5 m - TCTs setting-ups - TCDQ set-up - Qualification 1 if beams survive.
  • NO 17:00 meeting
Report from 08:30 meeting
Wednesday 16th June
  • ~midnight - 6:00 : Inject-Ramp-Squeeze for operational checks
  • 7:00-9:00 : access for world FIP repeater problem on 60A correctors in S78
  • 9:00-18:00 : Pre-cycle and beam preparation for the next collimation setting up - lost beams due to tune feedback - re-doing the whole exercise
  • 18:00 -22:00 : collimator setting-up at 3.5 TeV, un-squeezed, with separation on, 1e11/beam
  • Overnight : Controlled longitudinal emittance at 450 GeV, multi-bunches
  • NO 17:00 meeting
Report from 08:30 meeting
Tuesday 15th June
  • 23:00 - 4:00 : Squeeze commissioning to 3.5 m
  • 4:00 - 4:30 : Beta beat measurements at 3.5TeV, 3.5m - Cancelled - no AC dipole
  • 4:30 - 7:00 : Ramp down combo + RF access in UX45
  • 7:00 - 11:00 : Controlled longitudinal emittance blow up during the ramp, 1e11
  • 11:00 - 15:00 : Ramp-down combo and preparation for collimator setting-up at 3.5 TeV, 10m, 1e11/beam, separation on
  • until midnight : collimator setting-up at 3.5 TeV, unsqueezed, with separation on, 1e11/beam
  • NO 17:00 meeting
Report from 08:30 meeting
Monday 14th June
  • 12:00 : intervention for the cryogenics system finished
  • 12:00 - 18:00 : Pre-cycle, inject, prepare for high bunch intensity studies
  • 18:00 - 21:00 : Transverse damper commissioning during the ramp
  • 21:00 - 23:00 : Ramp down combo
  • THERE WILL BE AN 17:00 MEETING TODAY
Report from 08:30 meeting
Report from 17:00 meeting