Metrological controls & measurements for vacuum vessels & cold masses MQXF Workshop 19/10/2018

logo area Patrick Bestmann, Vivien Rude, Mateusz Sosin Scope & Motivation

• Specify the metrological controls on Vacuum Vessel and Coldmass • Based on the experience with the existing triplets • Ensure the conformity & compatibility of the components • Detect problems asap and before final assembly • The procedures do not cover any acceptance criteria or tolerance

logo area Patrick Bestmann 2 Vacuum Vessel: Features to be measured

• Extremity flanges • Cold feet support posts (composit) • Cold feet interface flanges • Jack interfaces • Fiducial positions • FSI interfaces (feedthrough)

• LEICA AT900 Series • SpatialAnalyzer Software logo area Patrick Bestmann 3 Vacuum vessel

Reference Frame • The Y axis is defined by the flange centers on the NIP-Side to IP side • The Z axis is the normal to the plane of the support post flanges • The X axis is prependicular to both forming a right handed cartesian system

logo area Patrick Bestmann 4 Measurement configuration

• The vessel need to be supported by its jacks in the final configuration • The vessel need to be installed sufficiantly high to allow the measurements of the support posts from below • 7 Stations will be needed for the measurements of all features (Bundle RMS max. 30µm) • A network of min. 12 Points should be used to connect all stations • The 12 auxillary fiducials should be present of the cryostat

logo area Patrick Bestmann 5 Extremity Flanges

• To evaluate form deviation and orientation of the flanges • Dynamic, space separated measurements, 1mm in 3D space with CCR 0.5" Reflector

CCR 0.5” Reflector CCR 0.5” Reflector

logo area Patrick Bestmann 6 Cold Feet Support

Reference Reference Cold feet Cylinder Plane support circle Reference Cylinder

Reference Plane

logo area Patrick Bestmann 7 Cold Feet Support

Cold feet support circle

• Measured as a circle in dynamic mode with 1mm space separated points • CCR 0.5 Reflector with 10mm Planar offset and 6mm shank diameter support

logo area Patrick Bestmann 8 Jack Interfaces

Dynamic measurements of a circle directly with CCR 0.5 reflector or connected probing device

CCR 0.5” Reflector

Jack interfaces

logo area Patrick Bestmann 9 FSI Interfaces

• Measurement of the 12 feedthrough flanges, position, form & orientation • Dynamic space separated measurements of a circle with CCR 0.5 on reflector support 10mm Planar offset, 6mm shank diameter

Feedthrough flange

logo area Patrick Bestmann 10 Deliverables • In a unified template provided by CERN Generals / Meta Data Metadata (Operator, Object ID, Date etc.) Instrument Meteorological conditions Network points Bundle adjustment Cold feet support posts Position of the three support post flange centers (cryostat & assembled composite support) Deviation of the support post flange centers to a straight line (cryostat & assembled composite support) Orientation of the three support post flanges (cryostat & assembled composite support) Form deviation (planar and circular) of the three support post flanges (cryostat & assembled composite support) Coplanarity of the support post flanges (cryostat & assembled composite support) Jack Interfaces Position of the 3 jack interfaces Extremity flanges Position of the vacuum vessel extremity flanges Orientation of the vacuum vessel extremity flanges Form deviation (planar and circular) of the vacuum vessel extremity flanges Fiducial reference cups Position of all fiducial reference cups Auxillary fiducials on Cryostat FSI monitoring Flanges Position of the FSI monitoring flange centers Orientation of the FSI monitoring flanges

logo area Patrick Bestmann 11 Coldmass: Features to be measured

• Cold feet support posts • Coldmass extremity reference points • Interface flanges • Coldbore shape • FSI reflectors

Cold feet support post FSI Reflectors

logo area Patrick Bestmann 12 Coldmass Reference Frame • The Y-axis of the coordinate system is defined by best fit line to the cold bore measurements from the connection side towards the non-connection side. • The YZ plane is defined by the avarage field direction of the magnets which has to be measured and transferred to the coldmass extremity references beforehand. • The X axis is perpendicular to both forming a right handed cartesian coordinate system. The longitudinal origine is the endcover reference point plane on the connection side.

Z

Y

logo X area Patrick Bestmann 13 Measurement Configuration

• Coldmass supported by a straight reference table • Table planarity of max. 60µm and horizontal 0.1mrad • Individual supports fulfilling the same criteria • The FSI reflectors need to be present at this stage

• LEICA AT900 Series

logo • SpatialAnalyzer Software area Patrick Bestmann 14 Cold feet supports

• Cold feets are measured as a circle around the support in contact with the supporting table. In dynamic mode with 1mm space separated points.

Cold feet

CCR 0.5 Support Table

logo area Patrick Bestmann 15 Coldbore & Flange measurements

• Coldbore measurements • Using a self centering mole device (provided by CERN) • One point measured every 50cm from both extremities • Flange Measurements • Dynamic, space separated measurements, 1mm in 3D space with CCR 0.5" Reflector on 10mm planar offset and 6mm shank diameter support

logo area Patrick Bestmann 16 Coldmass extremity measureemnts

• Reference points are measured with a CCR0.5” reflector on a 12mm planar offset and 12mm shank diameter support • All auxillary line extremities are measured in the same way than the colbore flanges.

logo area Patrick Bestmann 17 FSI interfaces

• The 12 reflectors of fully equipped FSI interfaces have to be measured

logo area Patrick Bestmann 18 Deliverables • In a unified template provided by CERN Generals / Meta Data Metadata (Operator, Object ID, Date etc.) Instrument Meteorological conditions Network points Bundle adjustment Self centring mole control results Coldmass extremity references Points D9-D11 on NonIP- and IP-side Cold feet supports Position of the three support post center Deviation of the support post center to a straight line Orientation of the three support posts Form deviation (planar and circular) of the three support posts Coplanarity of the support posts Cold bore tube Measured points inside the tube from both extremities Cold bore tube flanges in position, orientation and form deviation (if no flange is present the tube extremity should be measured) Interface flanges All flanges of the interface lines in position, orientation and form deviation (if no flange is present the tube extremity should be measured) FSI interfaces All FSI reflector positions in their final configuration

logo area Patrick Bestmann 19 Fiducialisation of Assembly

• The fiducialisation of the assembly is the transfer of the axis to the fiducials • The control of conformity for the interfaces is done at the same time • Following measurements are needed: • The coldbore measurement with the mole device • The measurement of the field direction and magnetic axis • All extremity references • All extremity flanges • All fiducials • FSI Reflectors on the coldmass inside the cryostat • Alignment of primary fiducials for monitoring system

logo area Patrick Bestmann 20 Fiducialisation of Assembly

+ FSI controls + Magnetic measurements

logo area Patrick Bestmann 21 Documents

The procedures are available here: https://edms.cern.ch/document/2038368/1

logo area Patrick Bestmann 22 logo area Jean-Frederic FUCHS 23