Magnetic measurements on the MQXFS6b at ambient temperature Lucio Fiscarelli Susana Izquierdo Bermudez Eelis Takala WP3 meeting, 24/07/2019

Preface on MQXFS6a b3 -4.5 units a3 +3 units MQXFS6a   Coil pack + Pads (927) After centering (927) After loading (927) TF TF int T/m/kA T/kA 8.711 9.868 8.731 9.925 8.761 9.958 Lm (mm) 1133 mm 1137 mm n bn an 3 -4.65 4.90 -4.54 3.06 -4.26 4 0.15 -1.17 0.62 -0.98 0.66 -1.59 5 -0.54 -1.24 -0.24 -1.39 -0.34 6 -4.87 0.73 -4.19 1.09 -2.96 1.12 7 -0.85 1.63 -0.90 1.44 8 -0.05 -0.45 -0.42 -0.04 -0.41 9 0.19 0.00 0.23 -0.01 0.02 10 -0.07 -0.06 -0.02 0.05 11 -0.03 12 0.01 0.03 13 0.04 14 -0.72 -0.74 15 125 µm 2 x 50 µm Kapton g 100 µm 50 µm 25 µm C212 C209 C208 C210 8 x 125 µm Kapton 208: L+R = 50 µm 209: L+R = -150 µm 210: L+R = 0 µm 212: L+R = -50 µm WRT Nominal Radial Size: Coil pack +32 µm Shimming -150 µm Tot -118 µm b3 -4.5 units a3 +3 units Clearance per side: 300 µm

Magnet assembled without pole keys MQXFS6b Magnet assembled without pole keys All coils previously tested at 1.9 K 2 in MQXFS6a Coils 210, 212 2 in MQXFS5a Coils 203, 204 210 204 203 212

MQXFS6b: coil sizes Eelis Takala MQXFS6a MQXFS6b* Max(µm) Min(µm) Mean(µm) Assumed(µm) 208 151 -38 64 50 209 -113 -227 -174 -150 210 34 -59 -15 212 -5 -61 -50 Coil Max(µm) Min(µm) Mean(µm) Assumed(µm) 203 93 13 42 50 204 -42 -119 -82 -100 210 6 -73 -68 -50 212 -24 -113 -37 *All coil re-measured after test at cold in the fist assembly

MQXFS6b: coil shimming Eelis Takala

MQXFS6b: MM at ambient temperature   Coil pack + Pads (927) After centering (927) After loading (927) TF TF int T/m/kA T/kA 8.781 9.974 8.805 9.519 (?) 8.842 10.104 Lm (mm) 1136 1081 (?) 1143 n bn an 3 -0.36 4.99 -0.41 4.66 0.31 4.38 4 0.49 -7.15 1.09 -6.36 0.79 -8.44 5 1.07 -0.85 1.37 -1.09 0.84 6 -4.93 0.55 -4.48 0.73 -3.35 0.68 7 -0.21 0.45 -0.19 0.00 0.46 8 -0.05 -0.51 -0.06 -0.50 -0.62 9 0.04 -0.25 -0.02 -0.24 -0.20 10 0.23 -0.07 0.30 0.28 11 -0.04 0.13 -0.03 0.14 12 0.03 0.05 0.01 13 0.18 0.08 14 -0.73 -0.74 -0.75 15 TF +40 units before/after loading b6 -1.1 units after before/after loading a3, a4 larger than expected

MQXFS6b: multipoles along the straight section bn an Coil pack units units n n bn an Centering units units n n bn an Loading units units n n

MQXFS6b: magnetic shimming y a4 of -8 units cannot be completely corrected by using the magnetic shims a3 of -4 units can be corrected 210 204 x 203 212 Correction capabilities using 9x58 mm shim in the bladder slots Order bn an 3 0.00 -3.42 4 5 0.11