MPS%20Commissioning

1
MPS Commissioning

• MPS commissioning may be split roughly in 2 parts
  
• A technical commissioning of all interlock system
  clients to ensure that all systems work properly.
• gtgt this part is discussed today!
• A beam commissioning where correct settings must
  be established to provide protection up to a
  defined energy/intensity (collimator absorber
  positions, BLM thresholds).

2
LHC BIS Overview
Movable Detectors
Beam Loss Monitors BCM
Experimental Magnets
Collimator Positions
Environmental parameters
LHC Devices
LHC Devices
Safe Beam Parameter Distribution
LHC Devices
LHC Experiments
Collimation System
Transverse Feedback and RF
Beam Aperture Kickers
SpecialBLMs
Operator Buttons CCC
Safe LHC Parameter
Software Interlocks
Sequencer
Beam Dumping System
Beam Interlock System
Safe Beam Flag
Powering Interlocks sc magnets
Powering Interlocks nc magnets
Magnet Current Monitor
Beam LifetimeFBCM
Screens / Mirrors BTV
Access System
Vacuum System
Beam loss monitors BLM
Timing System (Post Mortem Trigger)
Monitors aperture limits (some 100)
Monitors in arcs (several 1000)
Power Converters
Magnets
MPS (several 1000)
Power Converters 800
AUG
UPS
Cryo OK
Doors
EIS
Vacuum valves
Access Safety Blocks
RF Stoppers
3
BIS core

• User connection tests in progress, finished
  beginning July.
• gtgt When a connection is tested, can start MPS
  tests for the associated system.
• Beam permit loop robustness tests in progress
  (all inputs disabled)
• Driven by B. Puccio his team.

4
LHC Machine Protection Powering System gt50 of
all interlocks

• PIC
• Majority of interlocks are commissioned during
  HC
• Missing PIC-BIC connection / mapping of
  circuits (unmask, mask, ignore)
• PIC-BIC test to be done with the sequencer, ready
  by July (needs BIC input add-on).
• Time requirement 1 day/2 shifts per sector
  pair.
• Requires 2 adjacent sectors available reserved
  for the tests.
• Effort driven by Markus Z., Alvaro

Beam Interlock System
Powering Interlocks sc magnets
Powering Interlocks nc magnets
Magnet Current Monitor

• WIC FMCM
• Require powering of nc circuits.
• Test can be done together with PIC tests
• gtgt Proposal is to join with PIC tests
• Smaller number of tests wrt PIC gtgt manual tests ?

Power Converters
Magnets
MPS (several 1000)
Power Converters 800
AUG
UPS
Cryo OK
5
LHC Machine Protection Vacuum System

• Vacuum valves in one octant (including long
  straight section) can only be opened when
  conditions allow for opening, (magnets cold
  etc.).
• Details to be defined
• Test (open/close) every single valve.
• Random sample testing
• Effort driven by Gianluigi, BIS team and VAC
  Team.
• Need to wait for later stage of HC.

6
LHC Machine Protection Collimation System
Collimator Positions
Environmental parameters

• Collimator interlocks include position env.
  parameters.
• Tests do not interfere with HC relatively
  independent.
• Settings and tests have been agreed upon, comm.
  driven the collimation team
• Specs being updated.
• General strategy is defined, with automated
  sequences to probe every sensor.
• Starting soon

Collimation System
Beam Interlock System
7
LHC Machine Protection Beam Dumping System
Beam Dumping System
Beam Interlock System

• Ongoing testing during dry runs (with special
  BIS configuration), but such dry runs are not
  really MPS tests !
• With LBDS every test is related to MPS
• IST spec seems to exist lots of testing
  done/ongoing (EC dixit)
• The MPS spec is . basically empty must cover
  non IST, for example Beam Energy Tracking (BETS)
  system.
• gtgt Rather urgent need to define the tests (LBDS
  team)
• BETS tests can only be performed when all energy
  sources are connected
• MSDs, Q4s, kickers
• MBs 4-5, MBs 5-6, MBs 6-7, MBs 7-8 (½ of the
  machine !)

8
LHC Machine Protection Beam Loss Monitors

• Another special system ISTs and MPS tests are
  basically the same, since almost every function
  of the BLMs is associated to MP!
• MPS spec in medium state, IST spec much better
• Replace MPS spec with IST spec?
• IST spec check ?
• Most of the effort will be driven by the BLM
  team, coordination with MPS commissioning to be
  sorted out in the coming days.

9
LHC Machine Protection BTVs

• Tests are straight-forward and can be done as
  soon as BIC connection is ready BTVs ready to
  move.
• The possibility to re-use the automated test SW
  of the SPS transfer lines is under investigation
  (JW).
• Driven by R.Giachino JW.

10
LHC Machine Protection Experiments

• Test categories
• Magnets must test the interlock on fault state.
• Movable detectors VELO, ALICE ZDC ???
• Emergency dump whoever is ready (ATLAS, LHCb
  ??).
• Injection inhibit
• Not a lot of work, mostly coordination.
• Alick has (been) volunteered.

11
LHC Machine Protection Injection System

• Partly tested during dry runs.
• Relatively modest system, many inputs are
  similar to ring and transfer line interlock
  systems
• Vacuum.
• BLMs.
• MKI.
• FMCM.
• Collimators.
• Tests of the extraction interlock master BIC done
  together with TL interlock tests (a significant
  part already done).
• In hands of Verena, Jan JW.

12
LHC Machine Protection Other systems

• Operator button straightforward (Bruno with the
  BIS Team)
• Aperture Kicker
• Injection Kicker
• Beam Position IR6
• there is not much one can do before beam.
• RF and Transverse Feedback
• only cryo interlock on RF for the startup.
• Beam Current Monitor
• Access System

13
SIS General

• LHC SIS is not as critical for safe operation at
  the LHC as the SPS SIS is for the SPS and some of
  its lines.
• LHC SIS will produce 4 signals
• Injection inhibit beam 1 and beam 2 gtgt injection
  BICs
• Beam dump both beams gtgt CCR BIC
• (Some) alarms
• gtgt initially favour alarms over beam dumps
  (reliability of clients!)
• SIS running since a few months (also stress test)
  with a period of 2 seconds between signal
  updates.
• Signals are not yet send to the BICs to avoid
  interferences with BIS commissioning but can be
  armed any time.
• Configuration not yet final waiting for some
  signals appear in the control system.

14
SIS Commissioning

• Largest interlock group
• State of 800 (non-PICed) cold orbit correctors
  gtgt inj. inhibit.
• Configuration ready to be tested.
• Could be automated with sequencer.
• Many smaller groups that will require dedicated
  time to cycle through states, modes etc
• BTVs gtgt inj. inhibit
• Integrated field of CODs gtgt beam dump requires
  the complete machine !
• Current limits on separation dipoles MCBX gtgt
  inj. inhibit (exp. protection _at_ injection).
• RF cryo gtgt inj. inhibit ( beam dump ?)
• Energy intensity limits (MPS limits) gtgt beam
  dump
• whatever pops up
• Im in charge

15
Summary

• MPS commissioning effort to start soon, mostly
  likely beginning of July
• All BIS connections ready.
• Major systems (powering, collimators, ) ready
  with test SW/sequences
• - Powering comm. could be done in 8 shifts
• Clarifications are needed for BLMs and LBDS.
• Safe machine parameter commissioning to be
  defined, BIS team Alick.