Planning for the week MO M P   BCTFR, BPM setup (phases) with pilot intensity B1/B2, pilot 3 OK IR8 - injection region aperture B2 pilot 2 RF commissioning (loops, ...) 6 Two beams in LHC, parts 1 2 and 3 A 4 Collimation setting-up & protection - 450 GeV B1, pilot 1 Trial ramp N 8 Started Aperture measurements B1 TU MA ACCESS (previewed 9-16) from 9-22 no beam Recover (mostly QPS issues) and precycle WE 12 Recover (cryo problem 07 to 19) and precycles Restart after 2 days off - beam for 3 hours - PS vacuum TH Access in shadow of PS recovery setting-up beam 1, re-visit beam 2 OP/BI - energy matching/ capture/BPM PM First look at PLL then cryo problem 02-24 FR Access Recover Kick-response SA Initial commissioning of beam dumping system, beam 1 and 2 B1/B2 Key beam parameters revisited - beam 1 & 2, beam size etc. measure & correct tune, chromacity, coupling both beams ABP measurements SU Protection devices and collimator setting-up - b2/b1 MPS tests: FMCM, time delays Trial ramps KICK RESPONSE Solenoids/coupling compensation pilot, b1 MPS: BLM thresholds - check plus thresholds and checks on beam dump BLMs B1/B2 pilots pilot, B2 2/17/2019

Plan for Monday Injection region studies point 8 RF on beam 2 2 beams in the machine Collimator set up Test ramp Overnight Aperture measurements 2/17/2019

Monday Monday morning 7-10 Morning 10-12 Beam 2 to point 7 for injection region aperture measurements “Problem seems to be solved” Morning 10-12 RF work (phase loop closed), lifetime up to ~10h BI work in parallel Status both beams at midday Monday Lots of successful BI system commissioning RF capture and phase loop on Orbit, Q, Q’, coupling measured and corrected to first order Lifetimes ~10h Dispersion remarkably good Beta beating measured Kick response almost done for beam 1 Beam commissioning meeting Tuesday afternoon 2/17/2019

Aperture point 8 2/17/2019

Monday From 12.00 Beam 1 injected. Lifetime of order 1 hour. Orbit corrected. 13.20 Inject again B1. Inject B2. Both in bucket 1. Both beams circulating in LHC. Hands off by OP for half an hour. Adjustments based on BPMs through 1 and 5. Less easy in IR5 – could only move 1 beam – then lost 50% of 1 beam Hands off by OP for half an hour From 16.00 Beam 2 checks with beam dump at bucket 8911 and 26701 Then 2 beams in LHC at buckets 1 and 8911 Quiet beams for ALICE Then 2 beams in LHC at buckets 1 and 26701 Quiet beams for LHCb From 19.00 Beam 2 back in bucket 1 2 beams in for collimation set up Quickly steer IR5 (with new knob) and IR1 Quiet beams for 15’ for CMS and ATLAS 2/17/2019

2 beams in the machine 2/17/2019

2 beams in the machine 2/17/2019

2 beams in the machine 2/17/2019

Steering position with BPMs – IR1 2/17/2019

Steering position with BPMs – IR5 2/17/2019

Steering position with BPMs – IR2 2/17/2019

Steering position with BPMs – IR8 2/17/2019

Steering position with BPMs – IR5 revisited 2/17/2019

ALICE 2/17/2019

ATLAS 2/17/2019

CMS 2/17/2019

LHCb 2/17/2019

Monday Then difficulties to re-establish conditions From 19.30 to 22.30 collimator set up Dump debunched beam All losses on TCDS and TCDQ First test ramp just after midnight Beam 1 Beam to 540 GeV Losses at start Then stable Then losses (3rd order) Then difficulties to re-establish conditions Finally started aperture measurements around 04.00 Stopped at 06.00, pre-cycle, S12 problems still … Prepare for access 2/17/2019

Tunes during the ramp 2/17/2019

Orbit drift during ramp 2/17/2019

 No unexpected losses in arcs, experimental insertions, … First Multi-Stage Betatron and Momentum Cleaning after First Partial Collimation Setup (20% of collimators set-up: 5.7s ++, rest in coarse position, first energy ramp 24.11.2009) IR7 betatron cleaning (betatron halo losses) Beam 1 IR3 momentum cleaning (uncaptured beam) factor 1000 eff > 99% IR6 dump protection  No unexpected losses in arcs, experimental insertions, …

Tuesday/Wednesday Pre-cycle machine Access in LHC from 9 to 16 (became 22) Machine wide changes to nQPS on 600A Plenty of other things Radiation survey in the injectors 14-18 Difficult recovery through the night S12 cycle of Bends and Quads cycle failed around 22.00 Various problems to restart elsewhere in the machine Precycling wherever possible notably sector 12 (new QPS) for the first time Cryo problem S12 at 07.00 Wednesday. Access needed Exchange PLC Good cryogenic conditions 19.00 Sorting out (last of) QPS issues through morning / afternoon Ready for injection 22.00 Started with beam 2 very late Wednesday Revisiting Q, Q’ PS vacuum leak around 02.00 2/17/2019

Thursday PS vacuum leak around 02.00 Beam available again 16.00 More access in LHC, then cycling OK Beam available again 16.00 Beam 2 injected around 17.00 Problems to circulate Beam 1 With RF off Losses at TCDQ Put to parking position (which is nearer beam than it was) Losses now in IR3 as expected Energy matching using beam 2 Frequency down 106Hz SPS +250MeV Transfer lines trimmed to match Beam 1 circulating at 22.30 RF synchronisation had changed (was no longer in bucket 1) Some issues to be followed up with TCDQ position 2/17/2019

First turn after energy matching, beam 2 2/17/2019

Orbits 2/17/2019

Overnight Setting up B1 and B2 before KR campaign BI team in parasitic mode First PLL beam transfer function (BTF) measurement of the LHC, before any phase correction Beta-beating measurements on beam 1 H maximum 40% V maximum 30% Lost cryo in S34 at 02.00 PLC problem, similar to S12 earlier in the week Quench heater firing in S12 while sitting at standby To be understood 2/17/2019

BTF 2/17/2019

Friday Recovering from cryo PLC problem S34 (02.00) Limited access in the shadow for essential things TCDQ issue understood (IN<->OUT) Cryo S34 back at 18.00 Still problems to get all QPS OK S45 access needed Pre-cycling sectors when possible Finally all (needed) circuits OK at 23.00 Struggled with the injection interlock system Beam in around 01.30 Overnight Re-established conditions for beams 1 and 2 Kick response beam 2 (sectors 12 23 34 45 done) Beam dumps due to beam loss when starting sector 56 PS off from 04-07 2/17/2019

Tunes Beam 1 2/17/2019

Tunes Beam 2 2/17/2019

Planning at 5 o’clock meeting Friday 8   Access A Recover N Kick-response SA Initial commissioning of beam dumping system, beam 1 and 2 B1/B2 Key beam parameters revisited - beam 1 & 2, beam size etc. measure & correct tune, chromacity, coupling both beams B1/B2, pilot Optics measurements (beta beating meas and correct) SU Protection devices and collimator setting-up - b2/b1 4 MPS tests: FMCM, time delays Trial ramps B1, pilot MO Solenoids/coupling compensation pilot, b1 MPS: BLM thresholds - check plus thresholds and checks on beam dump BLMs B1/B2 pilots Aperture measurements pilot, B2 TU Two Beam Operation setting-up - 450 GeV - bumps 2x2, 5e9 MPS: aperture in insertion regions, Calibration/check of triplet BLMs, experiment dump tests with BCM pilot Solenoids & dipoles ON WE MPS: provoke magnet 'trip' and check adequate protection by collimators 450 GeV collision setting-up - experiments 2x2, 2e10 450 GeV collisions 2/17/2019

Saturday Beam dump studies started around 08.00 Synchronisation checked with beam by scanning RF bucket through sweeps for B1 and B2: beam 2 system looks spot on, beam 1 kick is too late by about 1ms - need to adjust to exact value with access to UA when opportune - in the meantime should use RF bucket 500 to make sure beam is extracted (bucket 1 ends up on TCDS and will provoke interlock). Beam 1 Beam 2

Saturday Protection devices and aperture scans Aperture scanned for B1 extraction channel Apertures look similar to those obtained for B2 on Monday Physical apertures seem OK on both planes Verification of the protection in case of asynchronous dump

Saturday Orbit Reference orbit B1 and B2 using common correctors Tune, coupling and chromaticity measurement and correction C_ down to ~0.005 (Beam 1)/0.0025 (Beam 2) after correction Chromaticity Measured values from +- 100, 50,0 trims off ref Beam 1  Q’H=+5 - Q’V=+7 Beam 2  Q’H=+9 - Q’H=+8 Undulator RU.L4 ON at 50 A: no effect on orbit/tune (Beam 2)  but not sufficient to see synch light  HW commissioning to be continued

Chromaticity measurement

Saturday BI commissioning summary phased in horizontal and vertical MKQA tune kicker for B1 and B2 measured and corrected PLL beam transfer function for B1 and B2 system (B2 requires some polarity/mapping checks) tested continuous radial modulation via the orbit feedback controller and verified switch on/off procedures, frequency and amplitudes behaviour performed initial PLL lock studies with B1, initial results look very promising, further assessment w.r.t. nominal PLL performance (bandwidth/sensitivity to resolve dp/p changes in the order of 1e-5) is needed performed semi-automatic chromaticity measurements and preliminary tune modulation/de-modulation studies in view of continuous Q' tracking -> some FESA/SW issues have been identified that need to be addressed Not yet ready for tune/chromaticity feedback

Tune kicker setting up

PLL setting up Chromaticity measurement

PLL tracking DQ=0.01

Chromaticity measurement QV’=15 QV’=5

Saturday/Sunday Summary of beta-beating studies: The beta-beating in beam2 was very different to the beta-beating measured before the ramp (most likely due to the lack of precycling then). For Beam1 the initial beta beating agrees with the measured after the ramp (Friday 00:00 am), proving no changes in time with proper pre-cycling. The first local error was found and successfully corrected in IP2 (MQXB2.R2 + 7e-5 and MQXB2.L2 -5e-5). A reduction of the peak vertical beta-beating in beam 1 of 10% was observed. No change was observed in the peak b-beat in beam 2 and the horizontal of beam1. We removed all the trims and re-measured the initial conditions without observing any change (no hysteresis effects). Another study in IP7 was started but due to lack of time and frequent beam absence was not conclusive.

Beta beat measurement Beam 1 Beam 2 H 40% H 40% V 40% V 60% 2/17/2019

Beta-beat correction First attempt of beta-beating correction Requires more time for injection tuning and chromaticity/coupling correction  go back to initial settings for the time being

Kick response corrector checks Beam 1 Beam 2

Sunday Summary collimation setup: BEAM1: => All IR3, IR7 to nominal settings (primary aperture about 5.7 sigma) ==> multi-stage collimation is set up ==> Dump protection IR6 set up ==> TCT's in IR1 cross-checked: rough setting confirmed ==> Other TCT's not touched: at +-15 mm around +-15-25 sigma BEAM2: ==> All IR3, IR7 to nominal settings (primary aperture about 5.7 sigma) ==> mutli-stage collimation is set up ==> Dump protection IR6 set up ==> TCT's not touched: at +-15 mm around +-15-25 sigma Additional tests: ==> Check on interlock threshold for tungsten collimators (see logbook entry) ==> Movement and beam loss response check for vertical Roman Pots, beam1 2/17/2019

Finding the beam edge 2/17/2019

Roman pots as well 2/17/2019

Sunday MPS checks Ramp tests Problem with patrol box in ATLAS 2-4 FMCM reaction checks etc Ramp tests Second LHC ramp with beam 1 to 1.04 TeV Tunes feed forward for next time Machine did not come back (no pre-cycle) Tunes off for beam 1 Tunes trimmed (beam 1) and incorporated into ramp Third ramp with both beams to 1.18 TeV !! Problem with patrol box in ATLAS 2-4 Injected again around 6 Beam 2 OK Beam 1 tunes wrong 2/17/2019

Ramp 2 orbits 2/17/2019

Ramp 2 tunes 2/17/2019

Ramp 3 tunes B1 2/17/2019

Ramp 3 tunes B2 2/17/2019