LHC Wed 16 Sept 2015 Struggling with cryo o-night Tuesday - Wednesday 07:11 Injecting again 09:00 Dump on injection of train of 144 bunches, losses IP7.

Slides:

Advertisements

Similar presentations

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

Advertisements

LHC 14 & 15 April :22: Ramp to 6.5 TeV lost due to MUFO, resulting in quench 10:30: Access during cryo recovery 16:00: Pre-cycle 17:05: RB.A78 short.

21/05/2012LHC 8:30 meeting Overview Week 20 Injectors, LHCb polarity, Beam-Beam Coordinators: Bernhard Holzer, Jan Uythoven.

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

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.

● 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.

: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.

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.

LHC progress Report LHCC Wednesday 23 rd March 2011.

● Main goals for week 33: – Luminosity production; – First 150 ns bunch train attempts; – Roman Pots: check movement at 3.5 TeV, with 1b; – Off momentum.

LHC Progress Thursday 29 th October 2015 Coordination Week 44: Massimo Giovannozzi, Wolfgang Hofle, Jorg Wenninger.

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.

Monday :00 Injection for physics fill # :00 Stable beams fill #1816, luminosity ~1.2x1033 cm-2s-1 11:08 Beams dumped. QPS trigger on detector.

LHC status Wednesday 15 th July 2015 Coordination: Wolfgang Hofle, Mike Lamont.

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.

Monday 12 th November 04:50 Beam dump, trip of RF line 4B, integrated L ~120 pb-1. Access for RF. 07:00 Injecting. FBCT phasing. Line steering. 09:59 Beam.

04:01 Injection kicker timing problems B2  Injection pre-pulse shifted, causing BETS to inhibit beam injection. 144 bunches on TDI.  Run without ROF.A81B2.

07:30 – 10:30 Asynchronous dump test with Beam 2. No issue found. FIDEL update. Now chromaticity decay corrected. 12:13 Beam dump due to problem in the.

– Machine closed. Ramp for powering tests & pre-cycle – Pilots through nominal cycle up to collisions. Measure chroma during squeeze. Check dump of pilots.

Thursday 20 th April 01:53 RCBV17.R7B2 tripped as happened few days ago: SIS intercepted. 05:54 Stable beams, 1380b, still RF problems B1, abort gap cleaning.

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.

Tuesday 7/7 & Night 8/7 06:53 Beam lost due to RF problem, understood  08:30 Access –VIP, Experiments, QPS, EPC, ABT, RF, BI, …. 15:15 Access over, expert.

Tuesday 7 th August - morning 07:10 Reinjection after loss of fill 2920 to UFO near ALICE  26 pb -1 in 1h16m; peak lumi 6.4e33 cm -2 s -1 08:10 dump at.

LHC Status Fri Morning 3-June

LHC Status Tue Morning 22-Aug

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.

LHC Status Wed Morning 13-April R. Assmann, B. Holzer et al

Wednesday 17th August Rocky, short fills, initial luminosities are good LHCb polarity change to negative seems ok 18/08/2011 LHC 8:30 meeting.

Saturday 30th June - Sunday: Rocky !

LHC Morning Meeting - G. Arduini

Saturday 09:40 Stable beams #1369 (56 bunch scheme)

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.

LHC Morning Meeting - G. Arduini

Thursday 17th May 01:11 Fill #2633 dump in squeeze arc circulator load channel Ad1B 03:16 Fill #2644 Stable beams, lumi 5.2e33 cm-2s-1 04:38 Dumped by.

Friday 31st August & night

Thursday 10th May - morning

Friday 14th December - morning

Chromaticity can make a difference…

Friday morning 10:30 Optics measurements and corrections.

Yesterday’s morning’s controls issues

Finally.... We had to wait a long time.... We had many problems....

Tuesday morning 09:30 Beam dump, SIS dump due to lost connections with FCG FECs. Coincides with starting a development SIS server to test new interlocks.

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

Aims for the week Recover from technical stop and precycle at 10A/s

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

Thursday Fill 1364 (24 bunch) dumped at 07h

Saturday Nov Stop proton operation. Switch back to ions

Thursday – Morning Energy matching at injection with H CODs

Fill 1743 Peak luminosity ~6.7 e32 Integratated lumi ~20 pb-1

Monday 6th 07:39 Dump fill #1854, RQ6.L2 tripped, followed by access

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

LHC Status Tue Morning 22-Aug

Monday Fill 1803 into stable beams at 9:30. Dump at 19:45.

Fri :52 Stable beams fill #2536

Wednesday h18: 228b fill lost just before start of ramp.

LHC Morning Meeting - G. Arduini

Another Immortal Fill….

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

Monday 27th August & night

Wednesday morning / afternoon

Wednesday morning Waiting for PS – problem on RF cavity.

Monday 14th May 00:03UFO at BLMQI.06R8.B2E10_MQML. Beam dump Re-steering required for TI2 03:28 STABLE BEAMS # e11 ppb, 4.11e33 cm-2s-1 13:36.

Saturday 28th 08:17 Fill #1812: Stable beams, peak luminosity ~1.1x1033 cm-2s-1 19:00 Go to adjust for RF-checks; Record fill lumi of 31.7 pb-1 for CMS.

Tuesday End of fill 1393 Movement of suspicious Roman pots OK

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

Sunday 12th 00:29 Stable beam fill #1864. Initial lumi 1.1e33

Presentation transcript:

LHC Wed 16 Sept 2015 Struggling with cryo o-night Tuesday - Wednesday 07:11 Injecting again 09:00 Dump on injection of train of 144 bunches, losses IP7 10:07 Again –Transverse damper investigations and reboot of ADT crates  11:00 Injectors problems, cryo needs a break … 11:44 Beam Current Change Monitor dump upon injection (oscillations) 12:30 Injecting again 14:19 Stable beams, fill #4376, 1033 bunches, 144 bpi 14:29 Dump due to UFO 19R4 LHC Morning meeting – SR & JU117/09/2015 Last 24 hours

LHC Wed/Thur 16 Sept :30 After dump lost cryo in 34, slow abort –Full pre-cycle needed –Access for LHCb + … 17:30 Injecting again 19:00 Problems PS during injection – dump as wait is long 21:30 Injecting again 22:30 During cryo wait very strong blow-up B2V: dump 23:19 Dump  lost CM in arc 34, followed by pre-cycle 01:10 Injecting again, fill in 3 steps – Chroma only down in V at waits 03:44 Stable beams fill # bunches, 144 bpi Cross fingers (04:53 UFO at 65 %) LHC Morning meeting – SR & JU217/09/2015

Transverse Damper Problem Daniel called, the injection gap cleaning FESA class has crashed, so it could be related to that – he's talking to Anthony. It seems the problem is related to a, yet unidentified, stability issues on ALLADTmDSPU processes. The quickfix that we can apply is a reboot from Diamon of the 4 ADT crates We will investigate on how to improve situation in the coming days, in between this methods should be applied as soon as you receive too many "RDA exceptions" on TRANSVERSE DAMPER CONTROL application. LHC Morning meeting – SR & JU317/09/2015 Anthony

Fill #4376, 1033 bunches, 144 bpi 10 min stable beams UFO 19R4 LHC Morning meeting – SR & JU417/09/2015

Fill 4379: Dump after cryo wait Strong blow-up B2H but especially V  restart, next time only chroma down vertically during wait: OK LHC Morning meeting – SR & JU517/09/2015

Fill #4381 Emittances at start of fill Some abort gap cleaning. Seems captured. LHC Morning meeting – SR & JU617/09/2015

The Plan At least two good fills with 1033 b, 144bpi Then possible step-up another 144 bunches –This would reach another rMPP milestone Under discussion, special fill for ATLAS for next week: –25ns_893b_881_828_830_72bpi17inj any scans etc. well defined Parasitic –RF studies as end of fill –TCL scans for Roman Pots –Monitoring of triplet movements and effect on orbit LHC Morning meeting – SR & JU715/09/2015