MQXFA 06 Coil Pack and Shimming Proposal Dan

MQXFA 06 Coil Pack and Shimming Proposal Dan Cheng, Katherine Ray, Paolo Ferracin 9/30/2020 LBNL

Outline § § § Coil Selection Review Recap Coil CMM Summary Coil Order Matrix Proposed Coil Pack and shimming Coil GPI Summary 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 2

Coil Selection Review Report (TBD) § Coil Selection Review was held 25 -Sep-2020 § See https: //indico. fnal. gov/event/45118/ § All coils are approved for use, Coil 123 spare (see report); a few notes § All coils have b 6 correction § All electrical QC passed § Fabrication reports of Coil 117, 119 indicate out-of-tolerance key slots § Radial sizes appear similar; midplanes appear to show slightly more deviation on 117 and 119 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 3

Total Arc Length Excess (Leica) § From Coil Selection Review Coil data shown at https: //indico. fnal. gov/event/45118/ 3850 mm is location of SG 117 averages 75 µm smaller per side 119 averages 40 µm smaller per side 122 averages 25 µm smaller per side 211 averages 25 µm smaller per side 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 4

Outer Radius Profile Deviations (Leica) § From Coil Selection Review Coil data shown at https: //indico. fnal. gov/event/45118/ Outer Radius deviation ranges are all similar among the coils 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 5

MQXFA 06 Coils Matrix Coil b 6 Corr. Keyway shift Nb. Ti Lead (I/O) Radial Sz. Midplane 117 Yes 350 µm LE 3. 05 m/1. 23 m ~-25 µm ~-75 µm 119 Yes 150 µm LE 3. 05 m/1. 23 m ~-15 µm ~-40 µm 122 Yes Ok 3. 05 m/1. 23 m ~-15 µm ~-25 µm 211 Yes Ok 3. 05 m/1. 23 m ~-15 µm ~-25 µm 123 Yes Ok 3. 05 m/1. 23 m ~-20 µm ~-25 µm § No coils exhibited electrical weaknesses upon LBNL acceptance § LBNL Measurements are using Leica system data § Keys will need to be machined on Coil 117, and 119 § Coil 117 magnitude max. ~350 µm beyond threshold on LE § Coil 119 magnitude max. ~150 µm beyond threshold on LE 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 6

MQXFA 06 Proposed Coil Arrangement 8 x dmidplane = 2 p x d. ROR 0. 001” Undersized R neglected. 001+” Undersized per Midpl. Add 0. 002” shim to midplanes ~0. 001” Undersized R Neglected 0. 001” Undersized per Midpl. neglected 119 211 0. 001” Undersized R Neglected 0. 001” Undersized per Midpl. 122 Q 1 Q 3 Q 4 117 . 001” Undersized R Neglected ~0. 003” Undersized per midpl. Add 0. 002” shim to midplanes Coil Electrical Order: A : 122 – 117 – 119 – 211: B Conforms to a favorable order based on RRR data (see Indico page for info) 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 7

MQXFA 06 Coil Pack Build 1 (Fuji) § Nominal Collar R: 114 mm § Nominal Coil R: 113. 376 mm § Nominal Radial shim = 0. 025” (0. 624 mm) § But we still target ~0. 020” § Fuji radial stack up is ~0. 021” (~0. 54 mm) § 0. 0045” Coil GPI + 0. 007” Fuji + 0. 005” Kapton & 0. 005” G 11 § Add 0. 002” to coils 117 and 119 midplanes 122 Kapton Ground plane insulation 119 211 117 0. 0045” (0. 114 mm) Coil Specific Radial Shim 0 0 Coil-specific midplane shim 0. 000” 0. 0 mm 0. 002” 0. 05 mm Fuji paper 0. 007” (0. 175 mm) Radial Shim 0. 005” Polyimide + 0. 005” G 11 (~0. 25 mm) 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 8

MQXFA 06 Coil Pack Build 2 (if Final) § Nominal Collar R: 114 mm § Nominal Coil R: 113. 376 mm § Nominal Radial shim = 0. 025” (0. 624 mm) § But we still target ~0. 020” § Actual radial stack up is ~0. 020” (~0. 51 mm) § 0. 0045” Coil GPI + 0. 005” Kapton & 0. 005” G 11 § Add 0. 002” to coils 117 and 119 midplanes 122 Kapton Ground plane insulation 119 211 117 0. 0045” (0. 114 mm) Coil Specific Radial Shim 0 0 Coil-specific midplane shim 0. 000” 0. 0 mm 0. 002” 0. 05 mm Fuji paper 0. 000” (0. 0 mm) Radial Shim 0. 005” Polyimide + 0. 005” G 11 (~0. 38 mm) 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 9

Summary § Coils 117, 119, 122, 211 chosen for the MQXFA 06 magnet § Coil 123 will be the spare § Coil circuit order is 122 -117 -119 -211 § Conforms to a favorable order based on RRR data § Some pole keys in 117 and 119 will be machined, verifying the locations 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 10

Additional Slides 30 -Sep-20 MQXFA 06 Coil Pack and Shimming Proposal 11