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

2. Outline Feb 11 2016MQXFA Coil Fiducialization2 Fiducialization Plan – Coil fiducialization – Magnet fiducial features Assembly tooling and infrastructure Magnetic measurements What can be achievable?

3. Fiducializing Coils Feb 11 2016MQXFA 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

4. Proposed Coil Ends Feb 11 2016MQXFA Coil Fiducialization4

5. Proposed Coil Ends Feb 11 2016MQXFA 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

6. Fiducializing the Coil Mechanical Center Feb 11 2016MQXFA 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

7. MQXFA Dummy Coil Feb 11 2016MQXFA Coil Fiducialization7 The MQXFA dummy coils will incorporate a three-hole pattern to test this

8. Summary Feb 11 2016MQXFA 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

9. Extra Slides Feb 11 2016MQXFA Coil Fiducialization9

10. Yoke fiducialization at Shell-Yoke Assembly Feb 11 2016MQXFA 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

11. Magnet Fiducialization Features Feb 11 2016MQXFA 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

12. Yoke Survey Tooling Block Feb 11 2016MQXFA Coil Fiducialization12 “1-2-3” Style block – Magnetic hold down

13. Fiducializing the Magnet Structure Feb 11 2016MQXFA 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 1-2-3 survey block

14. Warm Magnetic Measurements Feb 11 2016MQXFA 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

15. Proposed Fiducial Plan Feb 11 2016MQXFA 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

16. Magnet Assembly Tooling Layout Feb 11 2016MQXFA 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

17. Fixed, and aligned Magnet Integration Table Feb 11 2016MQXFA Coil Fiducialization17 Magnet shell/yoke assemblies will be located onto pillars that have been surveyed in

18. What is Achievable? Feb 11 2016MQXFA 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 http://www.faro.com/products/metrology/far o-laser-tracker/overview

19. Near-term B77a Feb 11 2016MQXFA Coil Fiducialization19

20. MQXFSD1 Alignment Observations Feb 11 2016MQXFA 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.)?