LHC Hardware Commissioning

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LHC Hardware Commissioning

• Status and Outlook for the LARP Participation

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LHC Hardware Commissioning
Preparation Studies
After the qualification for operation of the
individual systems of a sector (vacuum,
cryogenics, quench protection, interlocks,
powering, etc.),

• focus
• availability of components
• description of individual system tests
• procedures,
• sequence,
• conditions required,
• schedule
• definition of hardware commissioning between all
  system responsibles concerned
• procedures,
• sequence,
• conditions required,
• schedule
• investigation of failure scenarios (AC
  distribution, cooling and ventilation, vacuum,
  cryogenic system, cold electrical circuits,
  interlocks)
• documentation
• minutes of meetings
• description of
• individual system tests
• hardware commissioning procedures
• procedures to be applied in case of failures

each sector will be commissioned as a whole up to
the powering to nominal current of all the
circuits.
Validation and specific studies will be
carried-out on the first commissioned sector.
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LHC Hardware Commissioning
The programme

• Basic Assumptions
• 5 day weeks
• two shifts (15 hour days)
• two adjacent sectors
• two fronts at any time in each sector
• generalist operator in the field control room

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LHC Hardware Commissioning
The headcount
constraints from the installation and machine
start-up schedules
inventory
140 of which 40 missing
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LHC Hardware Commissioning
the superconducting electrical circuits
accent is put on the superconducting circuits but
we also have to commission the RF system, the
warm magnets, the injection system, the
collimator system, the dump system, etc.
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LHC Hardware Commissioning
the electrical systems
Power Converters not connected to Magnets
connexion of power cables to the current leads
Power Converters connected to Magnets
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LHC Hardware Commissioning
The inner triplet assemblies
ITHL
ITLL
RQX.R8 RD1.R8 RCBXV1.R8 RCBXV2.R8 RCBXV3.R8
RCBXH1.R8 RCBXH2.R8 RCBXH3.R8
RCSX3.R8 RCTX3.R8 RCOSX3.R8 RCOX3.R8 RCSSX3.R8
RQSX3.R8
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LHC Hardware Commissioning
The field
ITHL
LBR
ITHL
LBR
ITLL
ITLL
ITLL
ITHL
ITLL
ITHL
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LHC Hardware Commissioning
The field control rooms
ITHL
LBR
ITHL
LBR
ITLL
ITLL
ITLL
ITHL
ITLL
ITHL
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LHC Hardware Commissioning
LARP Participation
powering tests
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LHC Hardware Commissioning
Mechanical Engineer

• Participate in any surface fit up of magnets and
  dfbx.
• Take the responsibility (design, modifications,
  manufacturing, follow-up) for the changes to the
  interconnect kit if needed.
• Help training the contractor in charge of the
  interconnects and participate to the first
  interconnects. Follow-up the others.
• Participate in the review of the handling
  procedures for the final positioning of the USLHC
  deliverables.
• Participate in the review of the interconnect
  procedures.
• Advise the survey team in the alignment
  procedures.

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LHC Hardware Commissioning
Cryogenics Expert

• Review with CERN engineers the procedures for the
  cool down of the inner triplet subsector
• Participate in cryogenic connections in the
  tunnel
• During the cool down of the inner triplet
  subsector, take part in the operation, monitor
  the cryo instrumentation, participate to the
  tuning of the control loops.
• Perform specific tests such as "beam load
  compensating" cryo heaters, the beam screens, the
  quench pressure profiles and the heat loads
• Participate in the cryogenic commissioning of the
  DFBX with HTS power leads (tuning of the lead
  flows, study of the stability during current
  transients as well as in steady state conditions)
• Participate in the definition of operation
  procedures and maintenance plans as well as the
  management of technical documentation
• During operation with beam, study the effects of
  beam load on cryogenic performance

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LHC Hardware Commissioning
Magnet Scientist

• Participate to the review of the interconnect
  procedures, with emphasis on electrical aspects
• Participate to the review of the cool down
  procedure
• Collaborate with technicians involved in
  electrical quality assurance during assembly and
  cool down to validate instrumentation and
  insulation integrities.
• Organize with CERN staff, the connections of the
  cables to the power leads
• Participate to the review of the procedures for
  commissioning the electrical circuits
• Participate to the powering tests
• Interpret magnet performance and protection data
  during quench, ramps, etc
• Act as a conduit for relaying data between US and
  CERN including quench and magnetic measurements
  (should largely occur prior to acceptance)

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LHC Hardware Commissioning
near future 1

• Installation Assembly
• The procedures for the interconnection of IT
  magnets are expected to be defined by US-LHC and
  will be applied to the warm fit-up in Q105 on
  the surface.
• Warm electrical quality assurance will be applied
  to the individual components (HV tests) and to
  the string which will be electrically connected
  with temporary means (the busbars will not be
  soldered).
• Alignment procedures equipment specific to the
  IT assembly will also be tested on the warm
  fit-up.
• The installation of the IT magnets in sector 81
  is expected to start in Q405.
• The TASs have been delivered and accepted they
  are now owned by CMS and ATLAS awaiting
  installation. The TAN is being looked at by TS-IC
  and its installation is being studied.

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LHC Hardware Commissioning
near future 2

• Hardware Commissioning
• The first draft for the procedures for the
  hardware commissioning of an inner triplet
  subsector with or without D1 is almost ready for
  Engineering Check by the authors. It is based on
  the commissioning of an arc and was refined
  during several ad hoc and general meetings which
  took place in the course of the year.
• The task descriptions for US-LARP participation
  have been prepared might need refining.
• Head hunting
• our needs are for
• electrical engineers
• quench protection specialist
• power converter specialist
• are probably more than what could be detached
  from the US labs or that you would be eager to
  fund in the US-LARP

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LHC Hardware Commissioning
in summary

• getting ready for the commissioning in general
  and the IT region in particular
• we need experts who will be active in the field
• with experience
• people in the tunnel getting their hands dirty
• to be deployed on hardware commissioning
• most critical need in electrical engineering,
  quench protection, machine interlocks
• we dont encourage short term (
• integrated in the equipment groups commissioning
  the hardware
• discussions are needed to finalize
• procedures,
• mission at CERN,
• roadmap in general,