Thursday 10:00 Fill 1986 in stable beams.

Slides:



Advertisements
Similar presentations
8:16 SB 25ns dumped by RF; integrated lumi 0.6 nb-1. 9:14 BIC problem in TI8 and CMS recovering their tracker 10:09 Abort gap cleaning commissioning. 16:29.
Advertisements

PROFIBUS controller problem (SEU) on cryo valve on DFBMH (600 A circuit RQ6.L7B1/2). Loss of cryo maintain ==> Beam dump. End of fill #1975 after ~2.5.
Summary of Week 30 G. Arduini, J. Wenninger Main aims: “Adiabatically” increase peak luminosity by emittance reduction Luminosity production.
Tue 9/8 – Wed 10/8 Stable beams # :18 RQT12.R7B1 trip. End of STABLE BEAMS # ~86 pb -1 in ~19 hours 20:30 No beam from PSB (RF problem in ring.
Wednesday :06 Dump fill 3533: interlock BPMS in IP6
Beam dump at 03:00:
Wed 27/7 – Thu 28/7 09:00 LHC Controls problems
Monday Recover after trip of RB.A81  Cause of the trip not clear. MP3? 09:00-13:00 Re-inject and Injection verification. In parallel investigations on.
Machine Coordinators: G. Arduini, J. Wenninger
Monday :00 Stable beams 9_6_6_6 13:40 Access.
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.
Friday 07:00 Power glitch on the EDF network. Point 8 affected.
Monday fill with 1092 bunches (6 h stable beams)
02/08/ :35: Lost access chain in point 2 (PX24 PAD)  Dump after ~14.5 hours ~100 nb-1.
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.
Tue :25 Beams dumped due to RF vacuum interlock
Wednesday /Thursday 09-11:00 Verification of the LSS6 interlocked BPMs: took longer to fill due to some problems with RF cavities in the PS. In the mean.
LHC Morning Meeting - G. Arduini
Saturday 12:00 Fill 1992 in stable beams.
Fri 29/7 – Sat 30/7 09:00 End of fill 1990, PC trip RCBXV3.R1 (likely SEU on QPS). Integrated Luminosity: 41 pb-1. Access for MKI2 main switch replacement.
Summary of week 44 Aims of week 44 J. Wenninger & J. Uythoven
Monday – recovery from MKI flashover
Tuesday 08:30 Fill 2700 dumped by QPS on RCBXH2.L1
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.
Thu 19/5 06: :00 Investigations from vacuum and cryogenics
Summary of Week 16 G. Arduini, J. Wenninger
Friday 31st August & night
Wednesday 8th August & night
LHC Morning Meeting - G. Arduini
04-05/08/2010 End of physics at ~11:00 after 18.5 hours ~120 nb-1.
Thursday :00: Physics fill from the night shift
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.
Summary Thursday h21: Stable beams fill #1303.
Sunday/Monday & :30 Stable beams. Fill #1851.
Summary of week 19 Machine Coordinators: G. Arduini, M. Lamont Main aim: Luminosity production.
Monday 24 October hours of 25ns MD
Monday 14:00 beam dump Access:
Wednesday 10:00 test of the un-squeeze to 90 m at 4 TeV.
Thursday 04/11 - Morning Access until ~13:00 Pre-cycle Proton checks:
Summary week 18 Intensity ramp up & production
07/08/2010 Fill #1264 dump at 02:14:38.
Monday 11th June 08:10 Beam dumped in the ramp by OP. OFB did not start its function and kept the injection orbit. 08:50 Switch LHCb polarity to negative.
Thursday 22 September 2011.
Monday Fill 1803 into stable beams at 9:30. Dump at 19:45.
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.
LHC Status Fro Morning 9-Sep
Thursday
Saturday 24 September 2011.
Coordination: Eva Barbara Holzer, Mike Lamont
Monday 26th September 7:30 Beam dump, QSP on RQX.R1, lost cryo in ITR1, 91 pb-1. Cryo recovery, needed about 1.5 h. Setting of TI2 collimators to 5 sigma.
LHC Morning Meeting - G. Arduini
Friday h55 Stable beams. Fill #1841. Lumi ~1.2e33.
Tuesday 24/5 Fill # :00 Stable beam fill # bunches
Tuesday Access…. QPS intervention at 09:00 in point 8 (quench heater exchange) QPS installation oscillo for the ISRM measurement EPC intervention in point.
Monday 27th August & night
Wednesday 26 October 2011.
Wednesday 14:30 Fill 2011 dumped.
Wednesday morning / afternoon
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.
Wed 12/10 09:30 – 10:30 Ramp down of ALICE solenoid to 50% nominal field on request of ALICE. Increase of the vacuum (e-cloud in this area that has not.
Friday During the night from Thursday to Friday: by mistake, SPS longitudinal blow-up was not active  Smaller transverse emittance from the.
Saturday 26 November 2011.
Tuesday
Sunday 12th 00:29 Stable beam fill #1864. Initial lumi 1.1e33
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.
Wednesday Following the struggle with the vacuum in IR2 over the night, drop intensity to 1.2E11/bunch. Fill first B1 – pretty quiet – then B2 – quite.
Presentation transcript:

Thursday 10:00 Fill 1986 in stable beams. Blow-up switched OFF in the SPS. Emittance in collision ~2 um, a bit less beam than in previous fills. Very smooth. 10/14/2019 LHC 8:30 meeting

Lifetime dip only to ~10-20 hours, similar for both beams 10/14/2019 LHC 8:30 meeting

Some vacuum spikes in L8. 10/14/2019 LHC 8:30 meeting

12:30 Dump due to vacuum spike on klystron of B2. Integrated 14 pb-1. Injection delayed due to beam steering problems between PSB and PS. And then came the kickers… 10/14/2019 LHC 8:30 meeting

MKI2 event no. 1 16:30 Injected beam of 144b dumped on TDI in IR2. Main switch erratic on PFN C. Injected beam was not kicked, erratic was too late to prevent the extraction. Circulating beam was not hit. Heavy losses in IR2, but NO quench. Vacuum spike, valves closed. 10/14/2019 LHC 8:30 meeting

MKI2 event no. 1 BLMs 10/14/2019 LHC 8:30 meeting

MKI2 event no. 1 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 17:00 Following investigations by ABT expert, OP got green light to resume injection. Valves re-opened, vacuum pressure back to ‘normal’. 17:30 Resuming filling for physics. 18:02 Requesting 4th injection from 36b SPS cycle : 144b. Circulating B1: 12+2x144+72+144 ~500b, 6E13 p. 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 18:03 Massive beam loss during injection process. Main switch erratic again. D1.L2, triplet L2, D2.R2 quenched. Massive losses in IR2. Vacuum spike and valves closed again. ALICE hit (again). 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 BLMs: important leakage to S23 (but no quench) and IR7. 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 – SPS extraction analysis SPS LSS6 extraction interlock signals: BPF of LHC to FALSE ~2 ms before extraction time. MKE6 inhibited ~2 ms before extraction. Extraction conclusion: Event occurred ~2 ms before extraction. 144b were not extracted from the SPS – the losses are coming from badly kicked circulating LHC beam. Also confirmed by TI2 BCTs and BPMs – saw no beam. MKE6 PFN charging Extraction Extraction Extraction permit LHC BPF LHC 8:30 meeting 10/14/2019

MKI2 event no. 2 – dumped beam BTVDD and dump line BCTs indicate that ~ 200 bunches of the circulating were not dumped  to TDI. Beam kicked to TDI 10/14/2019 LHC 8:30 meeting

MKI2 event no. 2 – beam observation summary Erratic on MKI2 ~ 2 ms before extraction from SPS. SPS beam was not extracted (ouf !). ~200 circulating bunches were kicked towards the TDI. Bunches grazing on TDI quenched D1.L2, triplet L2 and D2.R2 and hit ALICE. 10/14/2019 LHC 8:30 meeting

Recovery 22:00 Start inject and dump mode with probes for B1. 80 injections – no problems. 23:00 Injected probe, corrected circulating beam. Injection line steering with 12b injections. 24:00 Filling for physics again. 01:00 Stable beams #1990, 1.9E33 cm-2s-1. 10/14/2019 LHC 8:30 meeting

Again very nice lifetimes. Bbb Shottky Q measurements. 10/14/2019 LHC 8:30 meeting

Cryo valve PROFIBUS (SEU?) Fill list Fill Termination Peak L (cm-2s-1) Length (h) Int. L (pb-1) Dump cause 1975 STABLE 1.6E33 2.5 13 Cryo valve PROFIBUS (SEU?) 1976 ADJUST - BLM TCSG.L7 1977 SQUEEZE RF Module trip 1979 1.3E33 6 23 QPS RCO 1980 RAMP QPS RQTL7 1985 1.75E33 11 50 El. net 1986 1.85E33 14 RF klystron vac 1990 7.5 41 PC trip RCBXV3.R1 10/14/2019 LHC 8:30 meeting