C. Petrone and L. Walckiers 16.11.2015 Magnetic measurement main results of SESAME quadrupole and sextupole magnets C. Petrone and L. Walckiers 16.11.2015 1
Magnetic Measurements Magnets measured: All 33 Sextupoles from Cyprus (SC) All 33 Quadrupole De-focusing (QD) 20 Quadrupoles Focusing (QF) (13 to be measured) 23 Sextupoles from Pakistan (SP) (10 to be measured) Magnets measurement procedure: Polarity checked (included the aux windings) De-Gauss procedure before and after the magnetic measurement cycles Pre-cycled three times from injection current to maximum current before any magnetic measurement
B2 for the quadrupoles System absolute calibrated w.r.t. SSW σ = 0.08 % QD B2 mean at 215 A : 0.0223 Tm σ = 0.04 % QF B2 mean at 250 A : 0.1038 Tm
Field angle for the quadrupoles σ = 0.09 mrad QD Angle mean at 215 A : -0.001 mrad σ = 0.187 mrad QF Angle mean at 250 A : 0.098 mrad
Magnetic axis location repeatability : 0.020 mm Magnetic axis QD and QF QD QF σ = 0.024 mm σ = 0.050 mm Mean X : 226.987 mm Mean Y : 445.005 mm σ = 0.025 mm σ = 0.050 mm Mean X : 227.021 mm Mean Y : 445.001 mm Earth magnetic field effect corrected by using measurements at negative current Magnetic axis location repeatability : 0.020 mm
QD multipoles I=215 A b6 : -0.11 ± 0.15 units b10 : -0.94 ± 0.02 units a3 : 0.14 ± 1.14 units b4 : 0.88 ± 0.92 units a4 : -1.02 ± 0.18 units b14 : 0.28 ± 0.01 units
QF multipoles I=250 A b6 : -0.06 ± 0.12 units b10 : -0.33 ± 0.02 units a3 : -0.11 ± 0.76 units b4 : -0.20 ± 0.32 units a4 : -0.18 ± 0.18 units b14 : -0.34 ± 0.01 units
B3 for the sextupoles σ = 0.09 % Cyprus B3 mean at 125 A : 0.0079 Tm σ = 0.09 % Cyprus B3 mean at 125 A : 0.0079 Tm σ = 0.06 % Pak B3 mean at 125 A : 0.0079 Tm
Field angle for the sextupoles σ = 0.15 mrad Cyprus Angle mean at 125 A : -0.1 mrad σ = 0.16 mrad PAK Angle mean at 125 A : 0.03 mrad
Magnetic axis sextupoles Cyprus Pakistan σ = 0.02 mm σ = 0.07 mm Mean X : 226.98 mm Mean Y : 444.98 mm σ = 0.03 mm σ = 0.08 mm Mean X : 226.97 mm Mean Y : 444.98 mm
Sextupoles b9 and b15 multipoles I=125 A Cyprus Pakistan b9 : 0.44 ± 0.13 units b9 : 0.78 ± 0.06 units b15 : -0.09 ± 0.01 units b15 : -0.08 ± 0.01 units
Sextupoles not allowed multipoles I=125 A Cyprus Pakistan Units Std b4 (units) -0.50 1.45 a4 (units) -0.83 1.47 b5 (units) 0.80 0.89 a5 (units) -0.02 0.72 b6 (units) 0.03 0.49 a6 (units) 0.46 0.16 b7 (units) 0.19 a7 (units) -0.01 0.14 b8 (units) 0.00 0.06 a8 (units) 0.04 Units Std b4 (units) 0.21 1.43 a4 (units) 0.37 1.40 b5 (units) 0.97 1.15 a5 (units) 0.36 1.24 b6 (units) -0.26 0.88 a6 (units) 0.48 0.14 b7 (units) 0.18 0.27 a7 (units) -0.05 0.25 b8 (units) 0.00 0.04 a8 (units) -0.01 0.06
Frequency response of correctors