LHC injection W. Bartmann, M.J. Barnes, C. Bracco, F. Burkart, E. Carlier, B. Goddard, V. Kain, R. Steerenberg, L. Stoel, F. Velotti, C. Wiesner, C. Xu.

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

Beam commissioning strategy Global machine checkout Essential 450 GeV commissioning System/beam commissioning Machine protection commissioning.
Injection losses and protection Evian, 12-Dec-11 W. Bartmann R. Appleby, P. Baudrenghien, C. Bracco, B. Dehning, A. Di Mauro, L. Drosdal, J. Emery, E.
Injection and Extraction Losses W. Bartmann with many inputs from: R. Appleby, R. Assmann, P. Baudrenghien, V. Boccone, C. Bracco, B. Dehning, E. Gianfelice,
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.
CONTENT: Beam characteristics and parameters Filling schemes Operational settings OP procedure and COLL setting Planning Shift breakdown To define the.
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 Beam Operation Comitte24. April INJECTION AND TRANSFER LINE STABILITY L.Drøsdal For the injection team.
1 Operational availability Optimizing LHC L. Ponce With the (un)intentiona lcontribution of all OP crew.
LHC Progress Friday 30 th October 2015 Coordination Week 44: Massimo Giovannozzi, Wolfgang Hofle, Jorg Wenninger.
00:15: Stable beams fill 1883, 1.1E33 cm-2s-1.  Seems the 144 bunches beam 1 doe not fit properly on the injection kicker waveform. Systematically the.
LHC Progress Thursday 29 th October 2015 Coordination Week 44: Massimo Giovannozzi, Wolfgang Hofle, Jorg Wenninger.
Overview Extraction tests: TT40 and TT60, week 21 –controls and data, interlocking, extraction, MKE6 transfer function and energy tracking, high intensity,
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.
SPS proton beam for AWAKE E. Shaposhnikova 13 th AWAKE PEB Meeting With contributions from T. Argyropoulos, T. Bohl, H. Bartosik, S. Cettour.
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.
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,
Outline of 2014/2015 plans V. Kain, M. Lamont, J. Wenninger 6/18/2013Optics Measurement and Correction Review
06:00 – Ongoing injection problems on beam 2  07:42 – Start of injection investigations  11:11 – Injection problem fixed. Resteering of transfer line.
LHC 8 & 9 May :10: Injection kicker B1 faulty on oil level –Check in UA and RA. Leaks fixed, to be further checked in TS1 10:30: Pre-cycle started.
Injection status W. Bartmann, C. Bracco, B. Goddard, V. Kain, A. Macpherson, M. Meddahi, S. Redaelli, J. Uythoven, J. Wenninger LIBD Meeting, 20 th Sept.
LHC Scrubbing Run 1 Day 3 (27/06/2015) Scrubbing team 28/06/2015.
07:00 Dump fil #2219, 123 pb -1 delivered. Trim TDI parking position to +/- 55 mm in the collimator BP trimmed the temperature kicker limit to 62 degrees.
Summary of ions measurements in 2015 and priorities for 2016 studies E. Shaposhnikova 3/02/2016 Based on input from H. Bartosik, T. Bohl, B. Goddard, V.
HP-PS beam acceleration and machine circumference A.LachaizeLAGUNA-LBNO General meeting Paris 18/09/13 On behalf of HP-PS design team.
MPP Workshop: Injection System C. Bracco on behalf of ABT Acknowledgments: STI, ABP, BI,LHC and SPS OP.
A preliminary overview on the 2014 Scrubbing Run II The scrubbing team, i.e. H. Bartosik, G. Iadarola, K. Li, L. Mether, A. Romano, G. Rumolo, B. Salvant,
LHC report Friday 22 nd June 2016 Coordination: Wolfgang Hofle and Mike Lamont.
Aperture measurements during LHC commissioning 2017
Use of a Diamond BLM System in the LHC Ring
Use of a Diamond BLM System in the LHC Ring
Cryo Problem MD Planning Tue (1.11.) C B Day Time MD MP Tue 01:00
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.
Plans for ions in the injector complex D
SPS extraction, transfer lines, injection
-9:00: Test IP transverse adjustment (CMS) and optics verification.
Saturday 21st April 00:33 Interlock during ramp on BLM HV
Fast losses at collimators during 16L2 dumps
Acknowledgments: LIU-PT members and deputies, H. Bartosik
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.
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
Thursday morning – optics correction
CNGS Primary Beam Results 2010
Tuesday Fill 1494 dumped by operations at (~ 0.25 ub-1 in ~6.5 h): LSS6 BPM interlock test 13:00 Fill 1495 dumped by RF dump (cavity quench) 14:00-17:30.
LHC commissioning Week 38
LHC Injection and Dump Protection
Lost at 12:05 to power converter (RTQX2.R1) problem
LHC Morning Meeting - G. Arduini
Tuesday 28th September Fill 1375 ongoing 09:00 Move in Roman Pots
Wire almost entirely through beam before BLM triggers dump
Tuesday 9th November 10:02 Fill beams dumped
LHC Morning Meeting - G. Arduini
Not the most productive 24 hours on record
MSWG Report – SPS OP Crew
Monday 24 October hours of 25ns MD
Beam dynamics requirements after LS2
Thursday 04/11 - Morning Access until ~13:00 Pre-cycle Proton checks:
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.
Programme for Friday 9 July
Wednesday 23/2 Thanks CRYO!!!.
Injection Studies: 50 ns ABT/BTP.
Tuesday 6th April 8:00 Injection studies 16:00 RF studies
Daniel, Gianluca and Belen (for the Collimator team)
Monday 152 bunch operation summary
Presentation transcript:

LHC injection W. Bartmann, M.J. Barnes, C. Bracco, F. Burkart, E. Carlier, B. Goddard, V. Kain, R. Steerenberg, L. Stoel, F. Velotti, C. Wiesner, C. Xu 7th Evian workshop 13th - 15th Dec. 2016

Outline Injection loss analysis Injection process – how to improve? 13/12/2016 LHC injection Outline Injection loss analysis Run1 vs Run2 Transverse vs. longitudinal Protons vs. ions Diamonds New IQC thresholds Injection process – how to improve? Suggested batch spacings for MKP/MKI for 2017

Injection losses from run 1 to run 2 13/12/2016 LHC injection Injection losses from run 1 to run 2 Run 1: 144 bpi, 25 ns, 2012 Dominated by TL shower

Injection losses from run 1 to run 2 13/12/2016 LHC injection Injection losses from run 1 to run 2 Run 1: 144 bpi, 25 ns, 2012 Run 2, 96 bunches Dominated by TL shower Dominated by longitudinal losses

Transverse inj. losses (until Sept) – Median 13/12/2016 LHC injection Transverse inj. losses (until Sept) – Median Chen Xu B1 B2 Transverse losses within 2% of dump threshold Better line stability and straightforward steering in Run 2 wrt Run 1 B1/B2 differences seen due to different TCDI to BLM geometries No issue foreseen with 288 b

Longitudinal inj. losses (until Sept) – Median 13/12/2016 LHC injection Longitudinal inj. losses (until Sept) – Median Chen Xu B1 B2 Longitudinal losses mainly dependent on beam type/configuration Reduction of factor 10 when switching on 2nd 40 MHz cavity at PS extraction

13/12/2016 LHC injection Sept – Dec 2016 Beam 2

13/12/2016 LHC injection Sept – Dec 2016 Beam 1

13/12/2016 LHC injection Sept – Dec 2016 Beam 1 Very good proton performance – room for tuning ions

Injection losses in operation 13/12/2016 LHC injection Injection losses in operation

Injection losses in operation - IQC 13/12/2016 LHC injection Injection losses in operation - IQC

Make IQC more useful for operation - thresholds 13/12/2016 LHC injection Make IQC more useful for operation - thresholds Simplify internal thresholds which define the colour code Transverse losses scale relatively well with injected intensity Ok as it is, enough margin for 288 b and 4.5 sig TCDI settings Longitudinal losses are much more dependent on beam type (Standard vs BCMS, 12b) and equipment configuration (PS cavities for bunch rotation, MKI flattop length) than number of bunches injected TDI: Loss < 30% - green Loss between 30% and 50% - orange Loss > 50% - red MQX: Loss < 10% - green Loss between 10% and 25% - orange Loss > 25% - red

Make IQC more useful for operation – include diamonds 13/12/2016 LHC injection Make IQC more useful for operation – include diamonds MKE MKI Kicked circulating beam Kicked injected beam TCDI dBLMs F. Burkart, LBOC 20th Sept. 16

Overview dBLMs around LHC 13/12/2016 LHC injection Overview dBLMs around LHC F. Burkart, LBOC 20th Sept. 16 Position Responsible HW Contact Read-out Data stored SPS extraction TPSG BE-BI-BL TE-ABT Scope + FESA PM Transfer lines TCDIh LHC injection TDI Collimation TCP BE-BI (data taking), TE-ABT (@ injection) and TE-MPE (@ flat top) ROSY + Scope BE-BI server, EOS Crystal collimation Crystal ROSY MD only Abort gap population BGI TE-MPE - LHC extraction TCDQ Scope locally * Many more: LINAC4, PS extraction, HiRadMat, SPS slow extraction TT20, etc….

Diamonds in SPS online monitoring app 13/12/2016 LHC injection Diamonds in SPS online monitoring app MKE waveform sample being replaced with OASIS signal

Outline Injection loss analysis Injection process – how to improve? 13/12/2016 LHC injection Outline Injection loss analysis Run1 vs. Run2 Transverse vs. longitudinal Protons vs. ions Diamonds New IQC thresholds Injection process – how to improve? Suggested batch spacings for MKP/MKI for 2017

13/12/2016 LHC injection Injection process Not clearly distinct in availability chart but usually a big contributor of idle time Related to stability of injectors?

Injection process Injectors well stable over several hours! 13/12/2016 LHC injection Injection process Not clearly distinct in availability chart but usually a big contributor of idle time Related to stability of injectors? Injectors well stable over several hours!

13/12/2016 LHC injection Injection process Aim to minimize waiting time at LHC injection for beam Ideal would be automatic preparation of LHC beam in injectors as soon as LHC starts ramp down Could fall back to prepared supercycle for LHC filling Some disadvantages like maintenance of several supercycle templates Should not impact other physics program like for dedicated LHC filling cycle Impact on MD program in injectors only if LHC is not ready to take beam as planned Daily tuning of LHC beams in injectors is very valuable and lead to impressive beam quality at SPS extraction – increased monitoring of beam quality is ongoing, e.g. SPS online monitoring tool with injection oscillations, intensity, diamond loss data and also foreseen for the PS complex  should help for automatization of LHC beam preparation

Outline Injection loss analysis Injection process – how to improve? 13/12/2016 LHC injection Outline Injection loss analysis Run1 vs. Run2 Transverse vs. longitudinal Protons vs. ions Diamonds New IQC thresholds Injection process – how to improve? Suggested batch spacings for MKP/MKI for 2017

MKP: 250 ns vs 225 ns batch spacing 13/12/2016 LHC injection MKP: 250 ns vs 225 ns batch spacing F. Velotti

200 ns batch spacing SPS? F. Velotti 13/12/2016 LHC injection 200 ns batch spacing SPS? F. Velotti Were running for weeks without damper in the SPS which was detrimental for beam quality of few bunches but accepted by LHC Can still see some effect with damper but much improved More sensitive to synchronisation drifts of injection kicker switches

13/12/2016 LHC injection 800 ns batch spacing LHC?

13/12/2016 LHC injection 800 ns batch spacing LHC? 770 ns

13/12/2016 LHC injection 800/200 ns with trains

13/12/2016 LHC injection Conclusions Injection losses were dominated by satellites on TDI until improvement of PS-SPS transfer Last two months of proton run with very low losses Median transverse < 1% Median longitudinal < 7% Maxima a factor 2-3 higher No issues expected with 288 b Ion run losses on the higher side in the transverse plane – would have needed some more tuning time Pure numbers in IQC indicated well the injected beam quality in run 2 Threshold simplification for IQC suggested based on loss scenarios In a further step we also aim at reducing its visual overstimulation Diamonds should migrate from being only available for experts to IQC Already working for SPS extraction Injection process fully automatized to minimize idle time at injection? 800/200 ns for MKI/MKP look promising and are suggested for 2017

13/12/2016 LHC injection Extra

‘Longitudinal’ losses 13/12/2016 LHC injection Recent injections ‘Transverse’ losses ‘Longitudinal’ losses

TCTPV issue See F. Burkart in LIBD, 14th June 2016 13/12/2016 LHC injection TCTPV issue See F. Burkart in LIBD, 14th June 2016

13/12/2016 LHC injection High losses during injection (wrong settings in SPS RF+ not enough scraping)