Monday February 28th 8h00: Injection

Slides:



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

RF de-bunching problem  The Beam Phase module measures the phase of each individual bunch and makes an average that is passed to the Low Level for updating.
MD#2 News & Plan Tue – Wed (19. – 20.6.) DayTimeMDEiCMP Tue06: GeV  4 TeV: Ramp for chromaticity - missed A 08:00Ramp down 10: GeV: Large.
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.
Saturday 6:13 – 15:00 STABLE BEAMS  scans etc. 15:00 moved to ADJUST Squeeze to 2 m in two steps 11 – 5 – 2  remarkably smooth  tertiary collimators.
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.
Friday March 4 th LHC morning report the short story: from a global point of view we had basically only one access !!!
06:00 – Ongoing injection problems on beam 2  07:42 – Start of injection investigations  11:11 – Injection problem fixed. Resteering of transfer line.
Saturday 11.9 ● From Friday – Minimum required crossing angle is 100  rad in 2010 – Plenty of aperture at triplets: > 13  (n1 > 10) – Can stay with 170.
Cryo back at 17:30 Beam back at 19:00 IR2 aperture until ~03:00 Since then no beam from the SPS:  Connector problem on MKD  Connector eroded, needs to.
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.
04h36: Cryo problem in arc 81. Access. 09h14: Injection.  TI8 injection collimator setup.  Testing new sequence.  New version of vacuum application.
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.
Tue 23/8 – Wed 24/8 09:00 Start 90 m optics run – Preparation and verification of the collimation functions – Re-generation of functions for Transverse.
Ion Commissioning: Thursday & Friday
Ralph Assmann, Giulia Papotti, Frank Zimmermann 25 August 2011
MD Planning Fri – Sat (26. – 27.8.)
Wednesday 8.9 External crossing angles:
1st LHC MD Period Started
Cryo Problem MD Planning Tue (1.11.) C B Day Time MD MP Tue 01:00
-9:00: Test IP transverse adjustment (CMS) and optics verification.
Wednesday 21 March 2012.
Saturday 21st April 00:33 Interlock during ramp on BLM HV
Monday :00 Stable beams 9_6_6_6 13:40 Access.
MD Report 24 June 2012 Machine coordinators: Barbara Holzer, Mike Lamont MD Coordinators: Ralph Assmann, Giulia Papotti, Frank Zimmermann MD#2 News & Plan.
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.
Summary of week 7 Hardware Commissioning:
Monday 14th March Second fill with pilot + 3 nominal bunches
Tue :25 Beams dumped due to RF vacuum interlock
Thursday morning – optics correction
LHC commissioning Week 38
Summary of Week 16 G. Arduini, J. Wenninger
MD#2 News & Plan Tue – Wed (19. – 20.6.)
Lost at 12:05 to power converter (RTQX2.R1) problem
Note: squeeze in Atlas, CMS, LHCb and Alice on going
Mon 22/8 – Tue 23/8 00:07 stable beams #2040. Initial luminosities: 2.1x1033 cm-2s-1 18:00 Programmed dump. End of physics #2040. ~83 pb-1 in ~18 hours.
Wed :40 Lost S78 - QPS controller.
Friday March 4th 08h32: Access for beam dump system.
MD#2 News & Plan Tue – Wed (19. – 20.6.)
Week 36 Machine coordinators R.Assmann, R.Bailey
Planning at 5 o’clock meeting Friday
Friday morning 10:30 Optics measurements and corrections.
Thursday :00: Physics fill from the night shift
Sunday
Friday 16/3 08:30 – 10:15 Access for QPS and EPC (BI in point 4)
Wednesday 09 March …:09:00: beta* measurement (1.5 m) by K-modulation and with AC-dipole excitation. 1/17/2019 LHC 8:30 meeting.
Saturday 7th May Sat – Sun night
Summary Thursday h21: Stable beams fill #1303.
Aims for the week Recover from technical stop and precycle at 10A/s
Monday :20 beta beat corrections during squeeze for flat machine finished Afterwards fixing issues at injection: BPM rephrasing for B2 solved.
Wednesday 10:00 test of the un-squeeze to 90 m at 4 TeV.
MD#2 News & Plan Tue – Wed (19. – 20.6.)
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
MD Planning Fri – Sat (1. – 2.7.)
Summary for LPC (March 7th, Ralph Assmann)
Friday 14th September 03:15 Beta* at 1 km. Optics measurements, see yesterday. 07:00 Dump. 08:00 Refill with 3 nominal bunches for high beta. 11:15 Beams.
Saturday 12 March Morning: problem on RSD1.A12B2 – flow rate problem on the cooling water for the converter. 14:00: Loss map -500 Hz (positive energy offset)
LHC Morning Meeting - G. Arduini
Wednesday 23/2 Thanks CRYO!!!.
Fri :52 Stable beams fill #2536
Thursday Aperture studies (foreseen until ~ midday, nothing done) Problems with single bunch B2 from SPS (extraction kicker not enabled) Setting.
Wednesday h18: 228b fill lost just before start of ramp.
LHC Morning Meeting - G. Arduini
Another Immortal Fill….
Thursday Morning/Afternoon
Wednesday morning / afternoon
Tuesday
Wednesday :35 : Beam lost because of trip of RCBXH3.L1
Saturday 29th October Friday during IP2 1 m squeeze test
Presentation transcript:

Monday February 28th 8h00: Injection 8h41: Injection and dump protection setup 14h21: XPOC problem 15h28: RF calibration 17h42: Access for RF 20h16: Access finished. Pre-cycle 21h30: Injection 22h34: Ramp 22h52: Squeeze for orbit checks 01-03-2011 LHC morning report

Monday February 28th SUMMARY of injection studies (Verena, Wolfgang, Chiara): Defined reference trajectories for B1 and B2 pilot and nominal bunch, in the catalog Recentered 4 TCDI collimators (3 vertial and 1 horizontal), new settings and thresholds (1/4 of sigma around actual position) updated in the trim application.The setup was done with pilot bunch in inject and dump mode. Settings should be rechecked when injecting nominal bunch intensity. New settings @ 4.5 sigma:                  Left             Right TCDIV.29012      2.37mm          -2.14mm TDIH.29050       3.92mm          -2.97mm TCDIV.29234      2.88mm          -2.65mm TCDIV.29509      7.88mm          -3.87mm 01-03-2011 LHC morning report

Monday February 28th 01-03-2011 LHC morning report

Monday February 28th RF study summary I (Philippe, Greg, Jose) First cavity phasing. Identical set-phase from the function generators: beam to see identical phase of the cavity field when crossing each cavity. Use beam as a probe: observe beam longitudinal position (beam phase) in SR4, compared to the phase of the corresponding RF, while we create a bucket with a single cavity. We transfer the bunch from one cavity bucket to next cavity bucket (temporarily having two cavities ON for the transfer) and wish to observe no difference in beam longitudinal position (resolution better than 0.5 degree at 400 MHz). Then move on to the calibration of the Vector Sum of 8 cavities (per beam) used by the beam phase loop. With cavities correctly phased (see above) we now observe the cavity sum output in amplitude and phase (w.r. to the SR4 RF reference) and again, use one cavity at the time and wish to see no variation in amplitude/phase. This is done without beam and implies adjustment of RF attenuators and delay lines in UX45, thereby calling for access to the cavern. 01-03-2011 LHC morning report

Monday February 28th RF study summary II (Philippe, Greg, Jose) All calibrations fit very well with 2009 and 2010 settings (see more details attached) except for Cav4B1 where one cable was replaced during the hdw commissioning 2011. 01-03-2011 LHC morning report

Monday February 28th Summary of the squeeze test for orbit (Joerg, Kajetan): We stepped in one go through the squeeze with a varying reference. - The start of squeeze reference consisted of the base orbit with the bumps matched to 10/11 m. The end squeeze reference consisted of the base orbit with the bumps matched to 1.5/3 m. The 10/11 m bumps were programmed to be taken out linearly through the squeeze, while the 1.5/3 m bumps were programmed in linearly. The result was an orbit error of arround 1 mm on the outgoing beam sides in IR8, roughly half as much on the incoming sides. Below 6 m the effects in IR8 became even smaller. This looks like an acceptable way of operating until a cleaner solution is implemented. We also observed some spikes of up to 0.3 mm rms of the orbit at different moments in the squeeze and that seemed to correlate with the stop points. To be understood tomorrow. 01-03-2011 LHC morning report

Monday February 28th 01-03-2011 LHC morning report

Tuesday March 1st 00h01: MPS tests (RD1.LR1 off). Recover and rampdown. 00h51: Injection. Reboot of OFC and OFSU fixed problem. 02h36: Ramp 03h06: Squeeze. Beta beat correction (B1 complete, B2 to be completed). Beam 2 affected by RQS.A78B2 trips. Coupling not corrected (2 beams required). 08h12: Beam dump. 01-03-2011 LHC morning report

Tuesday March 1st Summary MPS test (Joerg, Kajetan): MPS test with beam at 1.5 m beta* with RD1.LR1 (PC off) - OK! The FMCM triggered first, with a current change of 0.17 A/ 335 A (5E-4) at dump time. No visible orbit change is observed. One notes a small loss spike on the TCTH in IR1 during the dump action: the loss signal is larger than in IR7. Note that a radial modulation is on (visible on the orbit). 01-03-2011 LHC morning report

Tuesday March 1st 01-03-2011 LHC morning report

Tuesday March 1st 01-03-2011 LHC morning report

Ahead 28 MO 23:00 8 Beta beating & coupling correction and measurement through the squeeze 1 TUE 9:00 4 Collimation continued 13:00 6 Inj. & dump protection - 450 GeV 19:00 Ramp and squeeze to 3.5 TeV: MP and test collisions 2:00 Collimation validation at 450 GeV 2 WED Trial ramp to 3.5 TeV with 1 nominal bunch (RF blowup, orbit, emittance, damper, ...) 15:00 Transverse damper for multi-bunch 5 1.38 TeV ramp with pilot bunch 3 THU 0:00 Check of beta beat, orbit, coupling 8:00 Collimation setup 3.5 TeV before squeeze, 1 nominal bunch 16:00 Injection and dump setup (higher inetnsity, MP, …) FRI TL measurements 4:00 Ramp to 1.38 TeV, 1 nom bunch, test collisions 01-03-2011 LHC morning report