QXF Coil working group 2/11/16 Dan Cheng J. DiMarco, C. Hernikl, D. Humphries, S. Myers, X. Wang MQXFA Coil Fiducialization Proposal

Outline Feb MQXFA Coil Fiducialization2 Fiducialization Plan – Coil fiducialization – Magnet fiducial features Assembly tooling and infrastructure Magnetic measurements What can be achievable?

Fiducializing Coils Feb MQXFA Coil Fiducialization3 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

Proposed Coil Ends Feb MQXFA Coil Fiducialization4

Proposed Coil Ends Feb MQXFA Coil Fiducialization5 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

Fiducializing the Coil Mechanical Center Feb MQXFA Coil Fiducialization6 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 Dummy Coil Feb MQXFA Coil Fiducialization7 The MQXFA dummy coils will incorporate a three-hole pattern to test this

Summary Feb MQXFA Coil Fiducialization8 Coil fiducialization concepts and features proposed at coil and coil parts fabrication – Dummy coil will incorporate features Magnet fiducialization concepts are still being developed and will be tested with the first dummy assembly

Extra Slides Feb MQXFA Coil Fiducialization9

Yoke fiducialization at Shell-Yoke Assembly Feb MQXFA Coil Fiducialization10 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

Magnet Fiducialization Features Feb MQXFA Coil Fiducialization11 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

Yoke Survey Tooling Block Feb MQXFA Coil Fiducialization12 “1-2-3” Style block – Magnetic hold down

Fiducializing the Magnet Structure Feb MQXFA Coil Fiducialization13 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 be defined to coil targets Yoke features remain accessible after axial endplates are installed survey block

Warm Magnetic Measurements Feb MQXFA Coil Fiducialization14 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

Proposed Fiducial Plan Feb MQXFA Coil Fiducialization15 Yoke Fiducials, 3x-4x per axial location (bottom may not be readily accessible) Coil Fiducials, Impregnated (4x), Both ends Measured (mech/mag) Centers

Magnet Assembly Tooling Layout Feb MQXFA Coil Fiducialization16 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

Fixed, and aligned Magnet Integration Table Feb MQXFA Coil Fiducialization17 Magnet shell/yoke assemblies will be located onto pillars that have been surveyed in

What is Achievable? Feb MQXFA Coil Fiducialization18 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 o-laser-tracker/overview

Near-term B77a Feb MQXFA Coil Fiducialization19

MQXFSD1 Alignment Observations Feb MQXFA Coil Fiducialization20 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.)?