LHC Morning Meeting - G. Arduini

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5/11/2012LHC 8:30 meeting Summary of Week 44 Coordination: Mike Lamont & Jan Uythoven.

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Monday 29 October 08:48 V/dM scan CMS end of fill #3236. Check of “fast scan”. 10:06 V/dM scan finished, start of RF studies, reducing RF voltage. 11:10.

Saturday 7ish – refill for RP set-up 9:15 Going for Roman pot alignment. Stefano is coming. 12:10 TOTEM: Alignment of horizontal RPs B2 finished, short.

Friday 2 nd November 08:45 Stable beams Fill 3253 Initial luminosity ~7.3e33 cm-2s-1 09:45 Increase RF voltage from 10 MV to 12 MV 12:00 ADT to wideband.

:00 meetingEBH 1  6:39 beam dump by BLM 655ms RS on BLMEI.05L4.B2E10_MBRB (which is downstream of BSRT B2).  The losses increased during.

Tuesday 3 rd October STABLE BEAMS until 12:25 when we switched to ADJUST for a EOF test for Tobias  dump B2 first and then B1.  Dump at EOF test because.

Wednesday 5 th December until this morning 06:59 Stable beams fill #3375, L ~ 6.8e33 cm-2s-1. 10:40 Beam dump, trip of RD2.R5. Integrated L 72 pb-1 in.

Monday – Morning L. Drosdal: Injection line TI8: IQC threshold for BPM H from 2mm to 2.5mm to avoid unnecessary latches due to variations.

Summary of week 40 Machine Coordinators: G. Arduini, M. Lamont

Friday 15th June 01:11 Injection.

Wednesday September 14th

Friday 18/03 07:15 Test ramp with pilot after the test of dynamic FIDEL correction. Ramp was OK, but fill was stopped due to the trip of several RQTFs.

Saturday 21st April 00:33 Interlock during ramp on BLM HV

Tuesday Fill lost #1855 at 7:28 due to the trip of RQX.R1. This was traced to a software bug in the FGC… The Class 51 (LHC_PC) FGC software has been upgraded.

02/08/ :35: Lost access chain in point 2 (PX24 PAD)  Dump after ~14.5 hours ~100 nb-1.

LHC Morning Meeting - G. Arduini

Week 46 Week 46: Machine coordinators: Roger Bailey – Gianluigi Arduini Main aims of the week: Stable beams with ions Scheduled stop for ion source refill.

Tue :25 Beams dumped due to RF vacuum interlock

LHC Morning Meeting - G. Arduini

Coordination: G. Arduini, E.B. Holzer High beta* run: H. Burkhardt

LHC Morning Meeting - G. Arduini

Coordination: Gianluigi Arduini & Jan Uythoven

LHC Morning Meeting - G. Arduini

Wednesday Morning 8: :30 end of fill study - octupole polarity inversion (Elias, Tatiana, Alexey, Georges, …): Goal: study the effect of the.

Summary of Week 16 G. Arduini, J. Wenninger

Mon 22/8 – Tue 23/8 00:07 stable beams #2040. Initial luminosities: 2.1x1033 cm-2s-1 18:00 Programmed dump. End of physics #2040. ~83 pb-1 in ~18 hours.

LHC Morning Meeting - G. Arduini

Friday 31st August & night

Friday day 00:51 Fill #1862 Beams lost to inner triplet skew quad power converter fault. Delivered lumi 33 pb-1 Access required for repair RQSX3.L1 converter.

Wednesday 8th August & night

Friday March 4th 08h32: Access for beam dump system.

LHC Morning Meeting - G. Arduini

Chromaticity can make a difference…

Friday :00 machine setup for luminosity run. Better b-to-b stability from injectors. 01:58 stable run with 228 bunches 11:00 luminosity leveling.

LHC Morning Meeting - G. Arduini

Not the most productive 24 hours on record

Friday Morning 7:30 injection for fill 2908

Friday AM Some oscillations of the cryo conditions in MSR8 perturbed the setup for injection. RF frequency interlock fixed – required a reset of RF controls.

Friday 16/3 08:30 – 10:15 Access for QPS and EPC (BI in point 4)

Wednesday 9:08 Fill 3214 dumped by OP after 5:26 hours in stable beams

LHC Morning Meeting - G. Arduini

Summary Thursday h21: Stable beams fill #1303.

Summary of week 19 Machine Coordinators: G. Arduini, M. Lamont Main aim: Luminosity production.

Monday – Morning Fill 3265 stable beams since 1:31

LHC Morning Meeting - G. Arduini

Rocky last 24 hours Losses Q6.R5 Orbit SIS TCDQ OK! Power converters

LHC Morning Meeting - G. Arduini

Thursday Fill 1364 (24 bunch) dumped at 07h

Saturday 3rd November - morning

IP8 aperture measurements (07:30-10:30)

Tue/Wed 12/ :00 Probe beam back again

Thursday 26th July 13:21 Fill 2880 beam dumped

Thursday – Morning Energy matching at injection with H CODs

Thursday 22 September 2011.

Saturday :42 stable beams fill 3541

Friday morning 08:00 Stable beams with 840b.

LHC Morning Meeting - G. Arduini

LHC - Week 38 Technical stop: Katy Foraz

Thu 04:00 Fill #2729 Stable Beams. Initial lumi 6.5e33 cm-2 s-1.

Sat 15/10 New record bunch population profiting of the scrubbing period on Friday. Nb~1.42x1011p/bunch  110 MJ at 3.5 TeV. Filling slowed down by ZS sparking.

Saturday 24 September 2011.

LHC Morning Meeting - G. Arduini

Tuesday 24/5 Fill # :00 Stable beam fill # bunches

Thu :00 Dumped beams, refill for Pb-Pb physics. No more protons in 2011… Some changes: Increase of flat top total voltage to 14 MV. Feed-forward.

Saturday 6th October 05:38 STABLE BEAMS # :06 OP dump

Wednesday morning Waiting for PS – problem on RF cavity.

Friday During the night from Thursday to Friday: by mistake, SPS longitudinal blow-up was not active  Smaller transverse emittance from the.

Wednesday 8th (I) 09:22 Fill #1855. Beams dumped by Alice dipole trip Stable beams for 10.5 hours; int. lumi 31 pb-1 After investigation EPC could not.

Presentation transcript:

LHC Morning Meeting - G. Arduini Sat 27/10 7:58 beam dump by LBDS B2 (ASIBUS card failed), access needed; access for undulator repair in parallel. 10:32 LBDS ASIBUS card (safety bus) replaced 11:50 Undulator (L&R of point 4) power converters repaired. Synchrotron light monitors available at low energy. Insert BSRT mirror for B2 (F. Roncarolo) 14:33 STABLE BEAMS #3231. Initial luminosity ~7.4x1033 cm-2s-1 16:29 Trip of RCBWV5.L7B1. End of fill #3231. ~32 pb-1 in 2 hours 18:50 STABLE BEAMS #3232. Initial luminosity ~7.4x1033 cm-2s-1 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini Sun 28/10 No major issue with the change from summer to winter time 04:30 (winter time): electrical perturbation on 18 kV in point 1 effect of EDF perturbations. Trip of RD1.LR1 & LR5 and RD34.LR3 trip (we were going to dump anyway…). End of fill #3232. ~160 pb-1 in 10.5 h. 05:30 Ready at injection. No injection permit from LHCb 06:00 – 06:34 storm of electrical perturbations. Several Trips: RDs LHCb dipole RBs Presently recovering: RB still to be restarted, piquet on site PS trying to increase further satellites 16/04/2019 LHC Morning Meeting - G. Arduini

ALFA and BSRT temperature BSRT temperature evolution F. Roncarolo Long. Blow-up@inj Long. Blow-up@inj 3207 3220 3223 3225 3226 3229 BSRT B2 out 16/04/2019 LHC Morning Meeting - G. Arduini

ALFA and BSRT temperature ALFA temperature evolution B. Salvant Long. Blow-up@inj Long. Blow-up@inj 3207 3220 3223 3225 3226 3229 16/04/2019 LHC Morning Meeting - G. Arduini

Bunch length distribution Flat top 16/04/2019 LHC Morning Meeting - G. Arduini

Bunch population distribution Flat top 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini Nb2/tb distribution Flat top 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini Beam 2 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini B1 vs B2 Beam longitudinal spectra at flat-top B. Salvant 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini Satellites 25/10 12:27 Enhancement of satellite population 25/10 20:40 Reverted back due to LHCb triggers at injection 26/10 17:24 Longitudinal set-up (adjustment of re-bucketing on h=84). But no more satellite (LHC not informed) 27/10 10:36 Increased PS longitudinal blow-up to generate satellites. Not enough to be continued - ongoing (compatibly with losses) 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini Pending Gated BBQ on B2 Tuning of the transverse damper high bandwidth (1 hour) 16/04/2019 LHC Morning Meeting - G. Arduini

LHC Morning Meeting - G. Arduini 16/04/2019 LHC Morning Meeting - G. Arduini

ALFA and BSRT temperature BSRT temperature evolution 3223 3225 3226 3207 3220 3229 16/04/2019 LHC Morning Meeting - G. Arduini