Notes from Beam Commissioning meeting Tuesday 10th October

Main subject: continued testing, planned activities during imminent shutdown

Injector shutdown starts 11th November. Besides 34 warm, 45, 23 and at least part of 12 to be emptied.

Machine checkout 2009

• Re-test all QPS following modifications
• Full revalidation of beam interlock system
• Full revalidation of beam dumping system
• Higher priority to sectors 45, 56, 67, 78 to allow full deployment of BETS ASAP

Collimators

c/o Stefano

• 20 collimators in install in point 7, 2 & 8. Will not go beyond phase 1
• Upgrade front-end timing in 2009 (timing events, SMP - energy...)
• Synchronization tests have made good progress - still some to do. Some nice results here.
• Clear interest to maintain logging during shutdown

Injection

c/o Brennan, Etienne, Jan

Shutdown work

• Exchange weak MKI in P2 – to be confirmed by BT experts
• Extra BPM channels deployed and tested for TI8/2 – scope tbc
• TCLI to be installed.

Other tests/implementations

• MKI beam energy tracking  in place but an additional hurdle for testing the system during the shutdown when there is no proper energy distributed.
• TDI interlocking functions
• BI capture data
• Injection quality checks prototype
• Optimization of soft start algorithm - make it shorter and low stress (for OP).

Need to investigate a way of having pre-pulse without beam in SPS. Timing to add LTIM (Iaon)

Review of injection sequencing to take place soon.

Beam Dump

c/o Brennan, Etienne, Jan

Shutdown work

• Installation of 4 more MKBs (40->80% of nominal)
• Upgrade of MKB vacuum (pumps, gauges, interlocks)
• Inspection/repair of beam1 MKBs UA67 (B1)
• Installation and commissioning of MKD temperature stabilization
• Improvement of some switches (measure + adjust Full system re-validation Filters for BTVDD camera BCT#2 in TD lines
• BETS flat lined for now, would like to see Timing system play simulated energy ramp on request.

Other tests/implementations

• TCDQ interlocking functions (+ energy)
• Full tests of energy tracking with 4 sectors
• XPOC v2.0 (filling pattern, DB for thresholds)
• New arming PLC SW and sequences (PLC & TSU SW updates)
• Speed up inject and dump sequence

Aim to have installation finished by end Feb. 2009

System tests finished by end March 2009

Beam Instrumentation

c/o JJG, Lars

• Repair and deploy Schottky
• Keep pressure on CO vis a vis concentration, gateway stability, logging etc.
• Test post-mortem, input into beam based post mortem
• BPM system in sector 34
• In general FECs will stay up and running
• Test MKQA and AC dipole
• Filters on BTCDDs (request from Brennan)

Beam Interlock System

c/o Bruno

• No change in hardware
• Few more inputs - some more tests
• Development of monitoring and supervision tools
• Improve interface to post mortem and provide IPOC of BIS
• Develop automatic pre-operations test before injecting beam
• Deploy full Safe Machine Parameters system
  • for simulated energy - best if this comes eventually from BIS
  • intensity - link and send noise
• Logging of BIS channel that removed permit
• LSS3/4 safety stopper via vacuum system.
• BIS frequency off to the test bench.

RF

c/o Andy

• RF simulation with full ramping and slow re-phasing of the bunch clocks. Plus testing of electronics in experiments under these conditions.
• Damper amplifiers out/in
• repair tuner
• Tests of beam control
• Synchro and pre-pulses to be left operational.
• Test RT interface but really need beam
• Deploy transverse damper controls
• Abort Gap cleaning (c/o Malika)

LSA/Software/Controls

c/o Eugenia, Mike, Julian

Main objectives:

• Sequencer
• Post mortem with beam
• Injection Quality Checks
• Injection Sequencing
• Consolidation of SDDS, logging to Oracle
• Check re-start after stop in squeeze
• Numerous small features to be resolved. Clear List
• Timing: no changes!!!  Will implement TO_LHC_BEAM1 and TO_LHC_BEAM2 as dynamic destinations.
• Need to have dynamic destination sensitivity be implemented on the Mugefs...

Misc

Mike to set up mailing list to aid coordination of shutdown activities.

Reported by Mike Lamont 13/10/08