MQXF Workshop on Structure, Alignment, and Electrical QAFeb 2-4, 2016

Dan ChengJ. DiMarco, C. Hernikl, D. Humphries, S. Myers, X. Wang

MQXFA Magnet Fiducializationand Alignment

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Outline

Feb 3 2016 MQXFA Magnet Fiducialization and Alignment

• Fiducialization Plan– Coil fiducialization– Magnet fiducial features

• Assembly tooling and infrastructure• Magnetic measurements• What can be achievable?

MQXFA Magnet Fiducialization and Alignment

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Fiducializing Coils

Feb 3 2016

• Currently CMM measurements have only been characterizing coil size/shape

• We have not implemented any features to measure the coils and locate their mechanical centers yet

MQXFA Magnet Fiducialization and Alignment

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Proposed Coil Ends

Feb 3 2016

MQXFA Magnet Fiducialization and Alignment

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Proposed Coil Ends

Feb 3 2016

Either a coil fiducial plate, impregnated (Both ends),Or, 2-3 pin holes to be drilled into the end shoes and reamed after reaction

This method will be a direct measurement to the coils, removing the uncertainty of measuring the collar ends

MQXFA Magnet Fiducialization and Alignment

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Fiducializing the Coil Mechanical Center

Feb 3 2016

When coils are measured, CMM data will also measure the fiducials on both ends to locate them with respect to the theoretical center

Perhaps pin holes in poles can also be used in the ID if necessary; requiring spot faces

MQXFA Magnet Fiducialization and Alignment

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Yoke fiducialization at Shell-Yoke Assembly

Feb 3 2016

• We are exploring the possibility of both measuring and aligning the shell-yokes during the pre-assembly step– Are we able to perform an alignment at this stage, if

necessary?– Not yet sure if this is practical; we will try this, though

MQXFA Magnet Fiducialization and Alignment

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Magnet Fiducialization Features

Feb 3 2016

• Survey tooling block will be used when measuring the Yoke blocks to locate their centers

• Tooling block will be mounted to at least three quadrants (bottom quadrant is questionable) to fiducialize the structure

MQXFA Magnet Fiducialization and Alignment

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Yoke Survey Tooling Block

Feb 3 2016

• “1-2-3” Style block– Magnetic hold down

MQXFA Magnet Fiducialization and Alignment

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Fiducializing the Magnet Structure

Feb 3 2016

• Yoke/magnet fiducial features must be accessible after magnet has been assembled, as depicted here

Coil targets defined to their mechanical center

Yoke survey block will bedefined to coil targets

Yoke featuresremain accessible after axial

endplates are installed

1-2-3 survey block

MQXFA Magnet Fiducialization and Alignment

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Warm Magnetic Measurements

Feb 3 2016

• May use the existing warm measurement probe with a different arrangement of two pickup coils– we can measure the field angle from the first coil relative to that from the second coil as we scan along the magnet (We will

check the possible resolution of this method)• Tilt angle sensors

– The typical accelerometer with 12-bitADC has a resolution of 1 mrad (0.057 degrees). With inclinometers the resolution can reach 0.1 mrad

• Survey targets can be attached to the measurement probe to track position and location of probe during measurements

• Stretched wire measurements may also be performed• This information will be combined with the mechanical fiducialization data

MQXFA Magnet Fiducialization and Alignment

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Proposed Fiducial Plan

Feb 3 2016

Yoke Fiducials, 3x-4x per axial location(bottom may not be readily accessible)

Coil Fiducials,Impregnated (4x),Both ends

Measured (mech/mag)Centers

MQXFA Magnet Fiducialization and Alignment

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Magnet Assembly Tooling Layout

Feb 3 2016

Magnet integration table will be surveyed and fixed into place

Network of semi-permenent survey monuments for aligning the tables and defining coordinate system when surveying magnet structure

MQXFA Magnet Fiducialization and Alignment

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Fixed, and aligned Magnet Integration Table

Feb 3 2016

Magnet shell/yoke assemblies will be located onto pillars that have been surveyed in

MQXFA Magnet Fiducialization and Alignment

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What is Achievable?

Feb 3 2016

• This is more of a fiducialization process• Magnet alignment: No real “knobs to turn”– Assembly tooling will be aligned, though– Will likely use a laser tracker (FARO Vantage system)– Our survey crew will need to perform some tests

http://www.faro.com/products/metrology/faro-laser-tracker/overview

MQXFA Magnet Fiducialization and Alignment

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Summary

Feb 3 2016

• Coil fiducialization concepts and features proposed at coil and coil parts fabrication

• Assembly tooling will be surveyed and aligned• Magnet fiducialization concepts presented,

still in development

MQXFA Magnet Fiducialization and Alignment

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Extra Slides

Feb 3 2016

MQXFA Magnet Fiducialization and Alignment

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Near-term B77a

Feb 3 2016

MQXFA Magnet Fiducialization and Alignment

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MQXFSD1 Alignment Observations

Feb 3 2016

• MQXFSD assembly appears to be mechanically well centered– All alignment keys were loose after the bladder

operations (keys are not being loaded in shear)

Question: What are the specifications/requirements for the assembly (center, twist, etc.)?