SM18 Test FacilityA. Siemko"Workshop on Test Facilities and measurement equipment needed for the LHC exploitation"

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Outline

Expected Hardware Commissioning And Machine Exploitation Needs

Expected MAR Project Needs

Teams to perform the cold tests1st estimate of infrastructure needs

Conclusions

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SM18 Test Facility at present in future The series tests of the LHC magnets in SM18 test facility are expected to be completed beginning 2007.

The test facility will then be modified to support the accelerator exploitation.

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Hardware Commissioning And Machine Exploitation NeedsDuring hardware commissioning and further machine exploitation there will be intermittent (most probably) need to replace cryo-magnets due to:

Performance failures Cryo and vacuum integrityElectrical integrityQuench performance

Beam-related accidents

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Hardware Commissioning And Machine Exploitation NeedsDuring hardware commissioning and machine exploitation there will be recurrent need to test and retest the spare magnets

Qualification of newly assembled magnet units (MS and DS)

Qualification of magnets after repair

Retest after long duration storrage

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Hardware Commissioning And Machine Exploitation NeedsExtended performance studies will have to be performed - as it is expected - at the request of the AB teams and AT equipment owners

Extended Performance Studies Quench performance studies Electrical integrity studies Cryo and vacuum integrity studiesMagnetic field performance studies

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Hardware Commissioning And Machine Exploitation NeedsQuench Performance Studies not performed during the series testsQuench performance limitation due to the beam losses Quench performance limitation due to the cooling limitations Re-assessment of the performance if questionable during hardware commissioning and exploitation

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Hardware Commissioning And Machine Exploitation NeedsElectrical Integrity Studies

Long term stability and limitation Reproduce at laboratory level issues encountered in the machine. Study solutions.R&D on new diagnostic techniques

Cryo-Integrity Studies not performed during the series testsThermal tests: heat loads - static vs. dynamic, efficiency etc.Mechanical studies to assess the mechanical and vacuum limitations

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Hardware Commissioning And Machine Exploitation NeedsExtended Magnetic Field Performance Studies Precision transfer function measurementsImpact of powering history on field qualityStability of harmonics Stability of field direction vs. mechanical stabilityDynamic effects Cold alignmentCorrectors performance and alignment

R&D on new magnetic measurement techniques

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Expected MAR Project NeedsStandard performance tests and measurements will have to be performed on newly assembled magnets and magnets after repair Certification or re-certification of magnets before installation

Extended performance studies at request of equipment owners

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Particular issues related to different magnet typesArc magnetsSpare policy:Substantial number of spares will be available at startup of LHCBut:Knowledge of magnet performance towards efficient commissioning and reaching the LHC nominal luminosity is limited.Need to perform extended performance tests on a number of spare magnetsField quality FAME for FIDEL Power tests beam induced quench levels

Expected at present rate of magnets to be repaired and re-qualified for the tunnel use seems to be very limited

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Particular issues related to different magnet typesInsertion magnetsSpare policy:Spare magnets and all other components are available to cover the needs of one Dispersion Suppressor (3 units) and one Matching Section (4 units). Any SSS from Q4 to Q10 can be assembled and replaced. Expected production duration of a new unit at best in 4-6 weeks.Almost all individual spare magnets will be cold tested in B4

In case of performance failure in the machine the insertion magnets will stay on the critical path for the HC and operation

We will need an efficient rescue and cold test facility operational all time during commissioning and accelerator exploitation

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Test of magnets after repair Radioprotection issuesA designated cluster which permits to work with the risk of exposure must be allocated and equipped for the purpose of retesting of the activated magnets (subject not studied yet)

Protection of the personnel Protection of the environment

Monitoring of the dose rates Local shielding

Use of personal protective equipmentAll personnel must be trained for this specific work

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Cold tests of Separation Dipoles and Low- QuadsAdaptation/modification of the test benches needs to be studied

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Equipment Dedicated to Separation Dipoles and Low- Quads

Dedicated test Equipment for Separation Dipoles and Low- Quads needs to be studied

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Teams to perform the cold testsAt present

Transport, preparation of magnets, their installation on the test benches and removal work is presently executed by external contractor (ICS)

Cryogenic test preparation and operation is presently executed by external contractor (ALLS)

Routine cold tests and measurements are presently executed exclusively by external Indian collaborators and temporarily detached AB operators

Special tests and measurements are assured by MTM and ACR experts

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Teams to perform the cold testsIn future

The external contractors know-how and relevant tooling must be re-in sourced to CERN teams (plus associated FSUs) before the end of the present contracts

Key CERN experts should be identified and/or trained (mechanical, electrical, electro-mechanical, vacuum, cryogenics technicians). Know-how transfer from US Labs should be included

The competence of the CERN cold test expert technicians and engineers should be preserved and integrated in the future extended performance tests and/or repair and retest activities

Cryo operation from CCC needs to be studied

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1st estimate of infrastructure needs - proposal8 stands ought to be available for testing any of the LHC arc and insertion magnet sets

1 stand for MB/Arc SSS power tests (existing)

1 stand for DS/MS power tests (existing)

1 stand for Separation dipoles (adaptation/modification to be studied)

1 stand for Low-b quadrupoles (adaptation/modification to be studied)

2 stands for magnets with the risk of exposure (adaptation/modification to be studied)

2 stands for FAME project (existing)

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1st estimate of infrastructure needs - proposalIt is economically favorable to maintain the present size of the SM18 magnet test facility rather then to decommission part of it

Remaining test stands can be put on stand-by to be ready for:Unforeseen major retest needs,GSI magnet tests?Planned OSQAR experiment.LHC upgrade programmesPossible SPS/PS supra upgrade

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Conclusions SM18 test facility can fulfill all major cold test needs of LHC magnets related to:

MAR Project and also for the LHC exploitation

Required resources must still be defined in details and .allocated

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