Day 26.3. ● 09:00-14:00: Collimation setup 3.5 TeV – Slowed down by losses induced by tune hump. – 48 collimators set up. – Beam dumped by ATLAS during.

Slides:

Advertisements

Similar presentations

Beam commissioning strategy Global machine checkout Essential 450 GeV commissioning System/beam commissioning Machine protection commissioning.

Advertisements

LHC progress Thursday 30 th April 2015 Coordination: Mike Lamont, Wolfgang Hofle.

CERN Machine Protection – A Future Safety System? Introduction 1 SMP = Safe Machine Parameters System which receives accelerator.

LHC progress with beam & plans. Of note since last time Transverse damper Beta beating in the ramp Collimation set-up at 450 GeV & validation LBDS – systematic.

Weekly summary Summary Week /19.07 M. Lamont & J. Wenninger for the OP team and for all colleagues from the various groups 8:30 meeting 1.

● 08:30 Loaded by mistake squeeze function to 2 m  Dumped beams ● 10:30-13:00 Test of new algorithm for long. Emittance blow-up to minimize oscillations.

Plan for start-up with beam Friday  19:00 Machine closed. Ramp for powering tests & pre-cycle  22:00 Pilots through nominal cycle up to collisions. Measure.

ION COMMISSIONING REVISITED 1 Thanks to: John Jowett, Walter Venturini. Matteo Solfaroli.

LHC Studies Working Group – 03 July 2012 Beam Scraping and Diffusion + Asynchronous Dump MD G. Valentino, R. W. Assmann, F. Burkart, L. Lari, S. Redaelli,

:00: Prepared new fill B1: Q X =0.293, Q Y =0.269; lifetime = 25h ✔ B2: Q X =0.297, Q Y =0.267; lifetime = 5h ✗ Strong 50Hz and 100hz lines.

Friday to Saturday 02:00: Machine closed. 09:00: Cryogenics all OK. Preparing pre-cycle. 10:00: Pre-cycle started. 11:30: Pre-cycle finished. 14:00: Beam.

1 Interlock logic for LHC injection: intensity limitations Jörg Wenninger AB-OP-SPS Outcome of the join Machine-Experiments Workshop on Machine Protection.

V. Kain AB/OP1Sep 12, 2007 Summary of Discussion on Injection Protection Issues Injection Protection Issues – meeting 22 nd of June V. Kain, A. McPherson,

Monday h00: End of fill #1640: 3.7 pb h14: RB S12 and S23 tripped before loading rampdown table, active filter. MPE piquet. Fip_Com_Lost.

Tuesday 17 th April 04:00 Prepare second fill for v/d Meer scans. 06:22 Stable beams, v/d Meer scans for Alice and LHCb. 13:20 End v/d Meer scans.Dump.

LHC Progress Friday 30 th October 2015 Coordination Week 44: Massimo Giovannozzi, Wolfgang Hofle, Jorg Wenninger.

● 08h00: Adjust mode for end-of-fill study. Scraping test for determining transverse beam profile (beam 2, vertical). As expected, beam dumped with BLM.

09:25 Operator dump fill #2178, integrated lumi 107/108/18 nb-1. Trip of RQ4.R6 (fire heaters discharged) just after the beam dump but the QPS gave no.

LHC Injection Sequencing MD 16/23/2009 Injection sequencing / BCM R, Giachino, B. Goddard, (D. Jacquet), V. Kain, M. Meddahi, J. Wenninger.

BLM update procedure: - Updated the RT software - Updated the BLETC firmware (ver _A) - Changed the firware version in the MASTER tables and generated.

LHC Fri 6 & Sat 7 Nov :00 End instabilities MD, dump to refresh air at dump TDE cavern 08:00 Access for vacuum team at the TDE starting 10:30 Access.

Injection and protection W.Bartmann, C.Bracco, B.Goddard, V.Kain, M.Meddahi, V.Mertens, A.Nord, J.Uythoven, J.Wenninger, OP, BI, CO, ABP, collimation,

06:00 – Ongoing injection problems on beam 2  07:42 – Start of injection investigations  11:11 – Injection problem fixed. Resteering of transfer line.

Progress with Beam Report to LMC, Machine Coordination W10: Mike Lamont – Ralph Assmann Thanks to other machine coordinators, EIC’s, operators,

Monday 19 th March 07:33 Lost (another) beam in the squeeze, beyond 2 m, B2 hits 1/3 resonance. 08:30 Start (another) ramp  Try to correct coupling and.

LHC Status Sat Morning 30-June Bernhard Holzer, Jan Uythoven Status Friday Late: preparing restart some issues... LHCb dipole tripped / router problem.

DRY RUNS 2015 Status and program of the Dry Runs in 2015

MD Planning Fri – Sat (26. – 27.8.)

Wednesday 8.9 External crossing angles:

Saturday Coordinators weekend: Mike Lamont, Eva Barbara Holzer

Day :00-11:30: Optics at 3.5 TeV Optics re-measured with AC-dipole. Excellent reproducibility. Small emittance increase from AC-dipole. Collapsed.

-9:00: Test IP transverse adjustment (CMS) and optics verification.

Jan Uythoven For discussion

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

Monday h00: Ramp 10 A/s (chromaticity, crossing angle non-closure, beta-beating): At 7m and 3.5m, put in one by one crossing angles, calculated.

Monday 11/07: Recovery Plenty of accesses.

LHC Morning Meeting - G. Arduini

Thursday morning – optics correction

Tuesday TOTEM and transverse loss map (1) OK

LHC commissioning Week 38

LHC Injection and Dump Protection

Week 36 plan Todo’s: And also: 12+b injection.

Week 35 – Technical Stop and Restart

Planning at 5 o’clock meeting Friday

Friday morning 10:30 Optics measurements and corrections.

Thursday :00: Physics fill from the night shift

Tuesday 9th November 10:02 Fill beams dumped

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

Wednesday 03/11 – The Plan Finish electron-cloud program:

BI cont. *** Summary Matching Monitor test *** We only had ~15minutes of inject and dump, but managed to see a profile with ~9e9 p (!)

Summary Thursday h21: Stable beams fill #1303.

Monday 24 October hours of 25ns MD

Thu 6/4 End of fill #2470. ~1 pb-1 in 4 hours. Dumped by CMS BCM.

Wednesday 10:00 test of the un-squeeze to 90 m at 4 TeV.

Tuesday morning 08:30-09:00 Squeeze with probe.

Saturday Nov Stop proton operation. Switch back to ions

Monday 8th December Morning used for RF work (IP z, injection), damper noise checks. Stable beams period with LHCb spectrometer OFF – lost beam after.

Wednesday 13th 9:30 Stable Beams… with 1 pilot and 2 nominals

Programme for Friday 9 July

Monday morning 09:40 Dump fill 2838, integrated ~130 pb-1.

Thursday 17/3 Morning: evaluation of the origin of the timing problem occurred over night and the implication on machine protection 09:00 – 12:00 Dry ramp.

MD Planning Fri – Sat (1. – 2.7.)

Summary for LPC (March 7th, Ralph Assmann)

Plan for 1 m b* J. Uythoven & J. Wenninger

LHC Morning Meeting - G. Arduini

Thursday 22nd March 00:20 – 02:40 on longer squeeze function, orbit and chroma correction at 4 TeV 2:40 – 5:30 second cycle with long squeeze 5:46 – 7:00.

Wednesday 23/2 Thanks CRYO!!!.

Another Immortal Fill….

31/3/2010 Difficult day… but at the end stable beams.

HI2011 Commissioning Status

Presentation transcript:

Day ● 09:00-14:00: Collimation setup 3.5 TeV – Slowed down by losses induced by tune hump. – 48 collimators set up. – Beam dumped by ATLAS during IR1 TCT adjustment. ● 14:00-18:00: Prepare next fill – Orbit in the ramp now very good, < 0.28 mm both planes and beams. ● 18:00-21:00: Collimator setup – TCTs (re)done with collapsed separation bumps. – Issue with the setup procedure due to very low diffusion in the beams. The halo does not repopulate, the beam is slowed scraped down and become smaller  information of gap width cannot be used. – Beam dumped by ATLAS during IR1 TCT adjustment – strange event since the BCM was masked… 1

26.3. ● 21:00 Collimation summary – Beam 1: TCP: 4 out of 4 TCSG: 16 out of 16 TCT: 4 out of 8, to done: IR8 and IR5 – Beam 2: TCP: 4 out of 4 TCSG: 16 out of 16 TCT: 3 out of 8, to be done: IR2, IR5, IR8 H – TCLAs: skipped for now. – TCDQs: to be done with dump protection team. 2

26.3 ● Hump 3.5 TeV – periodicity of ~ 7 minutes Safe Machine Parameters System 3

26.3 ● Orbit in the ramp Safe Machine Parameters System 4

Day ● 22:30 Preparing for STABLE BEAMS 450 GeV setup. ● 23:00 EPC finished tests of ALICE spectrometer. ● 23:20 Problems with diagnostics of extraction master BICs. – The BIC HW worked correctly. – Traced to a ‘Denial-of-Service’ type error (more than 1024 history buffer records/SPS cycle) due to a fast oscillating Beam Presence Flag (BPF) of the LHC rings (TRUE - FALSE) in the ABSENCE of beam. The main issue is that the BPF MUST NEVER be TRUE with no beam. ’Fact finding’ ongoing… ● 00:30 Vacuum valves in TI2 closed. Pumps off. – Vacuum leak in the region of the mobile dump (TED). – Leak detection starting (access from SPS BA7). – Waiting for news…. 5

26.3 ● Protection/MP setup for 3.5 TeV - todos Safe Machine Parameters System 6 Collimator setup Dump protection (TCDQ) setup Collimator setup test H, V, dp/p  4 destructive tests Dump protection setup test Debunch beams, dump (simulation of asynch. Dump)  1 destructive test Collimator + TCDQ ramp TCDQ – beam Software Interlock (activate) Orbit Software Interlock (activate)

26.3 ● Protection/MP setup for 450 GeV - todos Safe Machine Parameters System 7 Collimator Setup Dump Protection (TCDQ) Setup Collimator setup test H, V, dp/p  4 destructive tests Dump protection setup test Debunch beams, dump (simulation of asynch. Dump)  1 destructive test TCDI (TL) collimator setup check High(er) intensity injection tests – possible request to allow for injection of 5E10 in empty ring in inject & dump mode Orbit Software Interlock (activate) Revisit….