Commissioning procedures Phase A'1

1
Commissioning proceduresPhase A.1
20th LHCCWG February 14th 2007

• M. Gruwé
• and
• R. Alemany, V. Kain, L. Ponce, S. Redaelli, W.
  Venturini

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Layout

• General comments (valid for all phases)
• Purpose of the procedures
• What are they based on?
• Input required from LHCCWG
• Phase A.1
• Some comments
• Web page describing procedures
• Remaining questions

3
General comments

• Trial of presentation in LHCCWG
• One phase presented per meeting (or every 2nd
  meeting)
• Will go through
• layout of the procedures web pages
• main steps of the procedure
• remaining questions
• But will not go into details (too long to go
  through in such a wide group)
• Work in progress
• (and will remain so till actual commissioning...)

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Purpose

• Our understanding of the purpose of these
  procedures
• Make sure everything required for the various
  beam commissioning phases is available/ready/thoug
  ht of (applications, instrumentation, equipment,
  etc...)
• Make sure responsible people are informed of the
  requirements
• Point out possible problems, missing
  functionalities, misunderstandings, etc...
• Ordered list of tasks to perform and results to
  achieve
• Not meant to be a complete how to do manual of
  each step or measurement for anyone to use
• Experts will obviously be there and perform
  specific tasks

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Based on...

• The procedures are based on
• Presentations in the LHCCWG
• Some Chamonix presentations
• Mikes web pages
• http//lhc-commissioning.web.cern.ch/lhc-commissio
  ning
• Discussions with experts, individuals
• Our current understanding...

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Input required

• Please read and check the proposed procedures
• Entry conditions
• Procedures
• Exit conditions
• Listed problems
• Remaining questions
• Give feedback

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Questions to LHCCWG

• Procedures
• Do they make sense?
• Is there anything missing?
• Entry conditions ( prerequisites)
• Do we have all the tools/equipment necessary for
  each step of the procedures?
• Exit conditions (outcome)
• Do we reach these by following the procedures?
• Do we want to achieve more than these exit
  conditions?
• Questions
• Remaining questions need to be discussed and
  solutions found
• Other points to be sorted out?

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Phase A.1 reminder

• First turn
• 450 GeV
• Pilot intensity
• Goal
• Commissioning of the injections
• Threading around the ring
• Commissioning of beam instrumentation.
• Ring 1 and ring 2.

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Web page

• The procedures for phase A.1 can be found in
• http//lhccwg.web.cern.ch/lhccwg/Procedures/stageA
  /phaseA1/index.htm
• Comments
• As one of the entry conditions link to LHC
  machine checkout web page (Mikes web page)
• To be added a table listing all steps of the
  procedures versus all required applications and
  instrumentation
• Procedures for phase A.1 should/will be discussed
  in the Injection working group (Brennan)
• No time estimate included at this stage. Should
  be added later to facilitate the beam
  commissioning planning.

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Remaining questions (I)

• Recycling required ever? If energy mismatch
  detected and MBs adjusted, recycling? If yes, how
  often?
• Will we have an additional event indexed database
  like SDA?
• Which magnets have to be fully commissioned for
  this stage?
• When shall we check interleaved ring 1/ring 2
  injections? Already in this phase?
• Display of the spare channels of BLM cards should
  be available in the CCC (this is currently not
  foreseen we need a soft to see all spare
  channels in the CCC)...NEEDED FOR MOBILE BLMs

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Remaining questions (II)

• Probably difficult to quench a magnet at this
  stage...but are BLM thresholds remotely
  changeable or not??
• While threading coarse calibration of the BPMs.
  How often do we send someone to fix problems? Do
  we continue if one BPM is missing? How many
  faulty BPMs do we allow?
• Which LHC mode are we in? BTVs should all be IN,
  but they can only be IN if in the "inject and
  dump mode". How do we do the transition from
  "First turn" to "Circulating beam" (for the BTVs'
  functioning)?