SLAC Magnetic Measurements Date: 11-10-2025 Time: 14:18:19 Project: FACET-II Magnet Type: Dipole Magnet Name: 4595 Serial Number: 30822-4 Run Number: 7 Measurement Device: 1wire Operator: sda Comment: Degauss Currents f = 0.88 totals point = 49 Imax = 14.5 Test Currents for MAIN (A): 14.50 -12.76 11.23 -9.88 8.70 -7.65 6.73 -5.93 5.21 -4.59 4.04 -3.55 3.13 -2.75 2.42 -2.13 1.88 -1.65 1.45 -1.28 1.12 -0.99 0.87 -0.77 0.67 -0.59 0.52 -0.46 0.40 -0.36 0.31 -0.28 0.24 -0.21 0.19 -0.17 0.15 -0.13 0.11 -0.10 0.09 -0.08 0.07 -0.06 0.05 -0.05 0.04 -0.04 0.00 14:18:44 Position moved: 0.000000 m 14:18:46 Magnet Current for MAIN, Imag = 0.0004 A Vtrans = 0.000037 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 14:18:47 Magnet Current for MAIN, Imag = 0.0010 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 14:18:48 Magnet Current for MAIN, Imag = 0.0007 A Vtrans = 0.000062 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 14:18:49 Magnet Current for MAIN, Imag = 0.0016 A Vtrans = 0.000137 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 14:18:49 Magnet Avgerage Current Measurement for MAIN : Imag = 0.0010 +- 0.0004 A 14:19:04 Initial Zero Current Measurement for MAIN, Imag_zero = 0.000969 A 14:19:04 Ambient Measurement Device(s) Being Used, type = None 14:19:05 Magnet Voltage Measurement Device(s) Being Used, type = HP34970 14:19:05 Temperature Measurement Device(s) Being Used, type = HPTHERM_HP34970 14:19:05 Ambient Measurement Device(s) Being Used, type = None 14:19:08 Position moved: 0.000000 m 14:19:11 Magnet system MAIN current ramping to 14.5000 A... 14:19:22 Magnet system MAIN current ramping to -12.7600 A... 14:19:39 Magnet system MAIN current ramping to 11.2288 A... 14:19:54 Magnet system MAIN current ramping to -9.8813 A... 14:20:08 Magnet system MAIN current ramping to 8.6956 A... 14:20:21 Magnet system MAIN current ramping to -7.6521 A... 14:20:32 Magnet system MAIN current ramping to 6.7339 A... 14:20:43 Magnet system MAIN current ramping to -5.9258 A... 14:20:53 Magnet system MAIN current ramping to 5.2147 A... 14:21:02 Magnet system MAIN current ramping to -4.5889 A... 14:21:10 Magnet system MAIN current ramping to 4.0383 A... 14:21:18 Magnet system MAIN current ramping to -3.5537 A... 14:21:25 Magnet system MAIN current ramping to 3.1272 A... 14:21:32 Magnet system MAIN current ramping to -2.7520 A... 14:21:38 Magnet system MAIN current ramping to 2.4217 A... 14:21:44 Magnet system MAIN current ramping to -2.1311 A... 14:21:50 Magnet system MAIN current ramping to 1.8754 A... 14:21:55 Magnet system MAIN current ramping to -1.6503 A... 14:22:00 Magnet system MAIN current ramping to 1.4523 A... 14:22:05 Magnet system MAIN current ramping to -1.2780 A... 14:22:10 Magnet system MAIN current ramping to 1.1247 A... 14:22:15 Magnet system MAIN current ramping to -0.9897 A... 14:22:19 Magnet system MAIN current ramping to 0.8709 A... 14:22:24 Magnet system MAIN current ramping to -0.7664 A... 14:22:28 Magnet system MAIN current ramping to 0.6744 A... 14:22:32 Magnet system MAIN current ramping to -0.5935 A... 14:22:36 Magnet system MAIN current ramping to 0.5223 A... 14:22:40 Magnet system MAIN current ramping to -0.4596 A... 14:22:44 Magnet system MAIN current ramping to 0.4045 A... 14:22:48 Magnet system MAIN current ramping to -0.3559 A... 14:22:52 Magnet system MAIN current ramping to 0.3132 A... 14:22:56 Magnet system MAIN current ramping to -0.2756 A... 14:22:59 Magnet system MAIN current ramping to 0.2426 A... 14:23:03 Magnet system MAIN current ramping to -0.2135 A... 14:23:07 Magnet system MAIN current ramping to 0.1878 A... 14:23:10 Magnet system MAIN current ramping to -0.1653 A... 14:23:14 Magnet system MAIN current ramping to 0.1455 A... 14:23:18 Magnet system MAIN current ramping to -0.1280 A... 14:23:21 Magnet system MAIN current ramping to 0.1126 A... 14:23:25 Magnet system MAIN current ramping to -0.0991 A... 14:23:28 Magnet system MAIN current ramping to 0.0872 A... 14:23:32 Magnet system MAIN current ramping to -0.0768 A... 14:23:35 Magnet system MAIN current ramping to 0.0675 A... 14:23:39 Magnet system MAIN current ramping to -0.0595 A... 14:23:42 Magnet system MAIN current ramping to 0.0523 A... 14:23:46 Magnet system MAIN current ramping to -0.0460 A... 14:23:49 Magnet system MAIN current ramping to 0.0405 A... 14:23:53 Magnet system MAIN current ramping to -0.0357 A... 14:23:56 Magnet system MAIN current ramping to 0.0000 A... 14:25:55 Magnet Current for MAIN, Imag = 0.0005 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000969 A 14:25:56 Main (V) Voltage Measurement, V = -0.000037 V 14:26:03 Temperature Measurement, Probe Number = 0, T = 25.175000 C 14:26:04 Temperature Measurement, Probe Number = 1, T = 24.684000 C 14:26:05 Temperature Measurement, Probe Number = 2, T = 24.397000 C 14:26:06 Temperature Measurement, Probe Number = 3, T = 24.790000 C 14:26:06 Magnet Test Parameter Measurements P0 = MAIN, Value = 0.00 P1 = Main (V), Value = -0.00 P2 = Coil_Top_Inside, Value = 25.18 P3 = Coil_Top_Outside, Value = 24.68 P4 = Core, Value = 24.40 P5 = Ambient, Value = 24.79 14:26:06 Magnetic Field Measurement Measuring the magnet strength... 14:26:06 Integrated Voltage Measurement... 14:26:07 Magnet Current for MAIN, Imag = 0.0001 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000969 A 14:26:16 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005415 Vs 14:26:25 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004875 Vs 14:26:26 Magnet Current for MAIN, Imag = -0.0002 A Vtrans = 0.000062 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000969 A 14:26:35 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005626 Vs 14:26:43 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005055 Vs 14:26:44 Magnet Current for MAIN, Imag = 0.0005 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000969 A 14:26:53 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004814 Vs 14:27:02 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004991 Vs 14:27:03 Magnet Current for MAIN, Imag = 0.0007 A Vtrans = 0.000137 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000969 A 14:27:11 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005433 Vs 14:27:20 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004642 Vs 14:27:20 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000000216 +- 0.000000182 Vs 14:27:20 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = -0.000000216 +- 0.000000182 Vs BL = -0.00002155 +- 0.00001821 Tm 14:27:24 Position moved: 0.000000 m 14:27:24 BL vs X Fit Coefficients: Cn sigCn n (Tm/m^n) ----- --------+-------- 0 -0.00002 0.00002 Compute Fit Residuals: X0 BL sigBL BLfit BL-BLfit (m) (Tm) (Tm) (Tm) (Tm) ----------- --------+-------- -------- -------- 0.0000000 -0.00002 0.00002 -0.00002 0.00000 14:27:24 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 -0.00002 0.00002 SL = -0.0000216 +- 0.0000182 Tm^2/m^n 14:27:24 Magnet Strength Measurement Harmonic Number = 1 SL = -0.0000216 +- 0.0000182 Tm^2/m^n 14:27:26 Position moved: 0.000000 m 14:27:34 Position moved: 0.000000 m 14:27:37 Magnet system MAIN current ramping to 0.0000 A...