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HL-LHC

Internal metrology and fiducialisationInternal Review 17 June 2019

Patrick Bestmann

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Internal Metrology

Patrick Bestmann 2

Internal metrology

Tooling Fabrication Tools & Molds

Parts Lamination, Colars, Coils, Keys

Magnets Main & Correctors

Coldmass

Cryo-

magnet

Assembly

MS

C &

Industr

y

Surv

ey

Fiducialisation

Assembly-

metrology

Assembly-

Metrology

Parts & Tools

metrology

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Internal Metrology & Fiducialisation

Internal metrology

All measurements needed for the assembly of magnets, coldmasses and Cryo-

assemblies....

Fiducialisation Transfer of the geometric / magnetic axis to the external fiducials on the vacuum vessel

Usually done with self centering beam tube probes and streched wire

Often combined with geometrical conformity control of extremities

Patrick Bestmann 3

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Triplet Magnets

Patrick Bestmann 4

Q1 & Q3 Build in US

Delivered cryostated & fiducialised to CERN

Full fiducialisation after transport at CERN

Q2 Coldmass build at CERN

Assembly metrology by MSC with help from SU

Full fiducialisation at CERN

Extended control needs

FSI integration =>talk Monitoring interne

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Triplet Magnets

Patrick Bestmann 5

Discussions with FNL colleagues ongoing

First measurements in US will be made with CERN assistance

CERN will provide: The methdodology (defined and agreed on)

The procedures (under approval)

The beam tube probe (drawings under approval)

Metric reflector supports (to be purchased) https://edms.cern.ch/document/2168890/1

https://edms.cern.ch/document/2168888/1

https://edms.cern.ch/document/2168886/1

136.7mm beam tube probehttps://edms.cern.ch/document/2141786/1

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Triplet Magnets

Patrick Bestmann 6

Fabrication control of all Vacuum Vessels @CERN First unit ready for measurements, procedures defined

Installation of auxillary fiducials & temporarily coordinate system for assembly

Metrology Procedures

First procedures for Vacuum vessel metrology

Coldmass metrology

Fiducialisation under approval

Assembly metrology already onging for first MQXB Deformation analysis after loading

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11T Dipoles

Patrick Bestmann 7

11T Dipole Coldmass constructed & measured by MSC

Cryostating with systematic controls of assembly before and after insertion into vacuum

vessel

Fiducialisation after cold test

215667526752

15660

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11T Dipoles

Patrick Bestmann 8

11T Dipole First series magnet arrived for cryostating

Assembly metrology before and after

Cryostating

Fiducialisation after cold test

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LEP Cryostats

Patrick Bestmann 9

LEP connection cryostat QEP coldmass build in SMI2, new structure

Continious assembly metrology & alignment by SU

Fiducialisation

QEN Bypass Alignment of cold-warm transitions (4 already done)

Fiducialisation

LEP(R/L)

A

LEP(R/L)

B

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LEP connection cryostats

Completly new construction strategy

Construction metrology & Coldbore alignment

2nd Coldtest in SM18 ongoing

Fiducialisation after cold test

Patrick Bestmann 10

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Cryo-bypass & Collimator

Patrick Bestmann 11

QEN Bypass Alignment of cold-warm transitions (4 already done)

Fiducialisation

TCLD Collimators Fiducialisation (Prototype + 1 Series done)

Alignment test in mock-up 926

Very critical assembly in terms of alignment

Alignment procedure already done

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D1 Magnets

Patrick Bestmann 12

First contact & discussions with KEK colleagues

Very well defined production procedure

Fully compatible with planned metrology measurements

Access to lamination until last moment for field direction

Laser Tracker

Targets on CM

Access to lamination

Endcover with References

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D2 Magnets

Patrick Bestmann 13

Build by MSC

Assembly measurements are made by MSC

Special build with two coldmasses

Probe production & consulting

Fiducialisation after cold test

94mm beam tube probehttps://edms.cern.ch/document/2141794/1

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Magnet Fiducialisation

Patrick Bestmann 14

We are quite well prepared now

All procedures in preparation or control state

Measurement hardware is ready

But waiting for more inputs concerning acceptance criteria and tolerances

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Magnet Fiducialisation

Patrick Bestmann 15

All magnets will be fiducialised after cold test at CERN By definition for magnets produced at CERN (LEP, 11T, D2 and Q2)

Produced by the collaboration as check for movements and integrity

Procedures are derived from existing LHC Cryomagnet procedure LHC-G-IP-0015 v.1.2

In order to be as universal as possible the naming conventions are extremly important

Introduction of a universal report template

Need to clarify magnetic measurement needs During constructions

During cold test

During final Fiducialisation

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Further Metrology

Patrick Bestmann 17

The assembly procedures are compiled at the moment

Assemblies like IR magnets and D2 have special needs during the further

assembly process Beam Screen alignment & control

Beam Position Monitor alignment & control

Cold WarmTransition alignment & control

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Open points

Patrick Bestmann 18

Naming conventions not fully defined Different from existing LHC conventions

Special assemblies and types which can, or not be rotated by 180°

Equipment and assembly names under creation For now only temp names, not good for documentation

First 11T assembly measured, still waiting for 11T Cryo-Assembly name

Tolerances Need to have approved tolerance tables for each assembly

Where to put our results? Not possible anymore in MMSMA

We could use a new approach and store this data in MTF

As usual all measurements are documented with reports in MTF, but without direct DB access

No problem for alignment, but as-build aperture model will be affected

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areaJean-Frederic FUCHS 19