SLAC Magnetic Measurements Date: 11-10-2025 Time: 13:00:45 Project: FACET-II Magnet Type: Dipole Magnet Name: 4595 Serial Number: 30822-4 Run Number: 9 Measurement Device: 1wire Operator: sda Comment: Degauss Currents f = 0.86 totals point = 49 Imax = 14.5 Test Currents for MAIN (A): 14.50 -12.47 10.72 -9.22 7.93 -6.82 5.87 -5.04 4.34 -3.73 3.21 -2.76 2.37 -2.04 1.76 -1.51 1.30 -1.12 0.96 -0.83 0.71 -0.61 0.53 -0.45 0.39 -0.33 0.29 -0.25 0.21 -0.18 0.16 -0.14 0.12 -0.10 0.09 -0.07 0.06 -0.05 0.05 -0.04 0.03 -0.03 0.03 -0.02 0.02 -0.02 0.01 -0.01 0.00 13:01:10 Position moved: 0.000000 m 13:01:22 Magnet Current for MAIN, Imag = 0.0010 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:01:23 Magnet Current for MAIN, Imag = 0.0007 A Vtrans = 0.000062 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:01:24 Magnet Current for MAIN, Imag = 0.0027 A Vtrans = 0.000224 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:01:25 Magnet Current for MAIN, Imag = 0.0015 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:01:25 Magnet Avgerage Current Measurement for MAIN : Imag = 0.0015 +- 0.0007 A 13:01:40 Initial Zero Current Measurement for MAIN, Imag_zero = 0.001491 A 13:01:40 Ambient Measurement Device(s) Being Used, type = None 13:01:40 Magnet Voltage Measurement Device(s) Being Used, type = HP34970 13:01:41 Temperature Measurement Device(s) Being Used, type = HPTHERM_HP34970 13:01:41 Ambient Measurement Device(s) Being Used, type = None 13:01:44 Position moved: 0.000000 m 13:01:46 Magnet system MAIN current ramping to 14.5000 A... 13:01:57 Magnet system MAIN current ramping to -12.4700 A... 13:02:14 Magnet system MAIN current ramping to 10.7242 A... 13:02:29 Magnet system MAIN current ramping to -9.2228 A... 13:02:42 Magnet system MAIN current ramping to 7.9316 A... 13:02:54 Magnet system MAIN current ramping to -6.8212 A... 13:03:05 Magnet system MAIN current ramping to 5.8662 A... 13:03:15 Magnet system MAIN current ramping to -5.0450 A... 13:03:24 Magnet system MAIN current ramping to 4.3387 A... 13:03:32 Magnet system MAIN current ramping to -3.7313 A... 13:03:39 Magnet system MAIN current ramping to 3.2089 A... 13:03:46 Magnet system MAIN current ramping to -2.7596 A... 13:03:53 Magnet system MAIN current ramping to 2.3733 A... 13:03:59 Magnet system MAIN current ramping to -2.0410 A... 13:04:04 Magnet system MAIN current ramping to 1.7553 A... 13:04:10 Magnet system MAIN current ramping to -1.5095 A... 13:04:15 Magnet system MAIN current ramping to 1.2982 A... 13:04:20 Magnet system MAIN current ramping to -1.1165 A... 13:04:24 Magnet system MAIN current ramping to 0.9601 A... 13:04:29 Magnet system MAIN current ramping to -0.8257 A... 13:04:33 Magnet system MAIN current ramping to 0.7101 A... 13:04:37 Magnet system MAIN current ramping to -0.6107 A... 13:04:41 Magnet system MAIN current ramping to 0.5252 A... 13:04:45 Magnet system MAIN current ramping to -0.4517 A... 13:04:49 Magnet system MAIN current ramping to 0.3885 A... 13:04:53 Magnet system MAIN current ramping to -0.3341 A... 13:04:57 Magnet system MAIN current ramping to 0.2873 A... 13:05:01 Magnet system MAIN current ramping to -0.2471 A... 13:05:04 Magnet system MAIN current ramping to 0.2125 A... 13:05:08 Magnet system MAIN current ramping to -0.1827 A... 13:05:12 Magnet system MAIN current ramping to 0.1572 A... 13:05:15 Magnet system MAIN current ramping to -0.1351 A... 13:05:19 Magnet system MAIN current ramping to 0.1162 A... 13:05:22 Magnet system MAIN current ramping to -0.1000 A... 13:05:26 Magnet system MAIN current ramping to 0.0860 A... 13:05:29 Magnet system MAIN current ramping to -0.0739 A... 13:05:33 Magnet system MAIN current ramping to 0.0636 A... 13:05:36 Magnet system MAIN current ramping to -0.0547 A... 13:05:40 Magnet system MAIN current ramping to 0.0470 A... 13:05:43 Magnet system MAIN current ramping to -0.0404 A... 13:05:47 Magnet system MAIN current ramping to 0.0348 A... 13:05:50 Magnet system MAIN current ramping to -0.0299 A... 13:05:54 Magnet system MAIN current ramping to 0.0257 A... 13:05:57 Magnet system MAIN current ramping to -0.0221 A... 13:06:01 Magnet system MAIN current ramping to 0.0190 A... 13:06:04 Magnet system MAIN current ramping to -0.0164 A... 13:06:08 Magnet system MAIN current ramping to 0.0141 A... 13:06:11 Magnet system MAIN current ramping to -0.0121 A... 13:06:14 Magnet system MAIN current ramping to 0.0000 A... 13:07:16 Magnet Current for MAIN, Imag = -0.0003 A Vtrans = 0.000100 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:07:16 Main (V) Voltage Measurement, V = 0.000075 V 13:07:23 Temperature Measurement, Probe Number = 0, T = 24.021000 C 13:07:24 Temperature Measurement, Probe Number = 1, T = 23.656000 C 13:07:25 Temperature Measurement, Probe Number = 2, T = 23.342000 C 13:07:26 Temperature Measurement, Probe Number = 3, T = 23.984000 C 13:07:26 Magnet Test Parameter Measurements P0 = MAIN, Value = -0.00 P1 = Main (V), Value = 0.00 P2 = Coil_Top_Inside, Value = 24.02 P3 = Coil_Top_Outside, Value = 23.66 P4 = Core, Value = 23.34 P5 = Ambient, Value = 23.98 13:07:26 Magnetic Field Measurement Measuring the magnet strength... 13:07:26 Integrated Voltage Measurement... 13:07:27 Magnet Current for MAIN, Imag = 0.0002 A Vtrans = 0.000137 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:07:37 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004796 Vs 13:07:45 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004928 Vs 13:07:46 Magnet Current for MAIN, Imag = 0.0003 A Vtrans = 0.000149 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:07:55 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005180 Vs 13:08:03 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005177 Vs 13:08:04 Magnet Current for MAIN, Imag = 0.0005 A Vtrans = 0.000162 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:08:13 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004893 Vs 13:08:21 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005146 Vs 13:08:23 Magnet Current for MAIN, Imag = 0.0005 A Vtrans = 0.000162 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:08:31 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004610 Vs 13:08:40 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004973 Vs 13:08:40 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = 0.000000093 +- 0.000000068 Vs 13:08:40 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = 0.000000093 +- 0.000000068 Vs BL = 0.00000932 +- 0.00000683 Tm 13:08:44 Position moved: 0.000000 m 13:08:44 BL vs X Fit Coefficients: Cn sigCn n (Tm/m^n) ----- --------+-------- 0 0.00001 0.00001 Compute Fit Residuals: X0 BL sigBL BLfit BL-BLfit (m) (Tm) (Tm) (Tm) (Tm) ----------- --------+-------- -------- -------- 0.0000000 0.00001 0.00001 0.00001 0.00000 13:08:44 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 0.00001 0.00001 SL = 0.0000093 +- 0.0000068 Tm^2/m^n 13:08:44 Magnet Strength Measurement Harmonic Number = 1 SL = 0.0000093 +- 0.0000068 Tm^2/m^n 13:08:46 Position moved: 0.000000 m 13:09:16 Magnet system MAIN current ramping to 14.5000 A... 13:09:27 Magnet system MAIN current ramping to -12.4700 A... 13:09:44 Magnet system MAIN current ramping to 10.7242 A... 13:09:59 Magnet system MAIN current ramping to -9.2228 A... 13:10:12 Magnet system MAIN current ramping to 7.9316 A... 13:10:24 Magnet system MAIN current ramping to -6.8212 A... 13:10:35 Magnet system MAIN current ramping to 5.8662 A... 13:10:45 Magnet system MAIN current ramping to -5.0450 A... 13:10:54 Magnet system MAIN current ramping to 4.3387 A... 13:11:02 Magnet system MAIN current ramping to -3.7313 A... 13:11:09 Magnet system MAIN current ramping to 3.2089 A... 13:11:16 Magnet system MAIN current ramping to -2.7596 A... 13:11:22 Magnet system MAIN current ramping to 2.3733 A... 13:11:28 Magnet system MAIN current ramping to -2.0410 A... 13:11:34 Magnet system MAIN current ramping to 1.7553 A... 13:11:39 Magnet system MAIN current ramping to -1.5095 A... 13:11:44 Magnet system MAIN current ramping to 1.2982 A... 13:11:49 Magnet system MAIN current ramping to -1.1165 A... 13:11:54 Magnet system MAIN current ramping to 0.9601 A... 13:11:58 Magnet system MAIN current ramping to -0.8257 A... 13:12:03 Magnet system MAIN current ramping to 0.7101 A... 13:12:07 Magnet system MAIN current ramping to -0.6107 A... 13:12:11 Magnet system MAIN current ramping to 0.5252 A... 13:12:15 Magnet system MAIN current ramping to -0.4517 A... 13:12:19 Magnet system MAIN current ramping to 0.3885 A... 13:12:23 Magnet system MAIN current ramping to -0.3341 A... 13:12:27 Magnet system MAIN current ramping to 0.2873 A... 13:12:30 Magnet system MAIN current ramping to -0.2471 A... 13:12:34 Magnet system MAIN current ramping to 0.2125 A... 13:12:38 Magnet system MAIN current ramping to -0.1827 A... 13:12:41 Magnet system MAIN current ramping to 0.1572 A... 13:12:45 Magnet system MAIN current ramping to -0.1351 A... 13:12:48 Magnet system MAIN current ramping to 0.1162 A... 13:12:52 Magnet system MAIN current ramping to -0.1000 A... 13:12:55 Magnet system MAIN current ramping to 0.0860 A... 13:12:59 Magnet system MAIN current ramping to -0.0739 A... 13:13:02 Magnet system MAIN current ramping to 0.0636 A... 13:13:06 Magnet system MAIN current ramping to -0.0547 A... 13:13:09 Magnet system MAIN current ramping to 0.0470 A... 13:13:13 Magnet system MAIN current ramping to -0.0404 A... 13:13:16 Magnet system MAIN current ramping to 0.0348 A... 13:13:20 Magnet system MAIN current ramping to -0.0299 A... 13:13:23 Magnet system MAIN current ramping to 0.0257 A... 13:13:27 Magnet system MAIN current ramping to -0.0221 A... 13:13:30 Magnet system MAIN current ramping to 0.0190 A... 13:13:34 Magnet system MAIN current ramping to -0.0164 A... 13:13:37 Magnet system MAIN current ramping to 0.0141 A... 13:13:41 Magnet system MAIN current ramping to -0.0121 A... 13:13:44 Magnet system MAIN current ramping to 0.0000 A... 13:15:08 Magnet Current for MAIN, Imag = -0.0004 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:15:08 Main (V) Voltage Measurement, V = 0.000000 V 13:15:12 Temperature Measurement, Probe Number = 0, T = 24.189000 C 13:15:13 Temperature Measurement, Probe Number = 1, T = 23.899000 C 13:15:14 Temperature Measurement, Probe Number = 2, T = 23.502000 C 13:15:15 Temperature Measurement, Probe Number = 3, T = 24.070000 C 13:15:15 Magnet Test Parameter Measurements P0 = MAIN, Value = -0.00 P1 = Main (V), Value = 0.00 P2 = Coil_Top_Inside, Value = 24.19 P3 = Coil_Top_Outside, Value = 23.90 P4 = Core, Value = 23.50 P5 = Ambient, Value = 24.07 13:15:15 Magnetic Field Measurement Measuring the magnet strength... 13:15:15 Integrated Voltage Measurement... 13:15:16 Magnet Current for MAIN, Imag = 0.0002 A Vtrans = 0.000137 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:15:25 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005023 Vs 13:15:34 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004915 Vs 13:15:35 Magnet Current for MAIN, Imag = 0.0005 A Vtrans = 0.000162 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:15:44 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005072 Vs 13:15:52 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005048 Vs 13:15:53 Magnet Current for MAIN, Imag = -0.0004 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:16:02 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005041 Vs 13:16:10 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005449 Vs 13:16:11 Magnet Current for MAIN, Imag = -0.0000 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001491 A 13:16:20 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005011 Vs 13:16:28 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004865 Vs 13:16:28 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = 0.000000016 +- 0.000000111 Vs 13:16:28 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = 0.000000016 +- 0.000000111 Vs BL = 0.00000162 +- 0.00001108 Tm 13:16:32 Position moved: 0.000000 m 13:16:32 BL vs X Fit Coefficients: Cn sigCn n (Tm/m^n) ----- --------+-------- 0 0.00000 0.00001 Compute Fit Residuals: X0 BL sigBL BLfit BL-BLfit (m) (Tm) (Tm) (Tm) (Tm) ----------- --------+-------- -------- -------- 0.0000000 0.00000 0.00001 0.00000 0.00000 13:16:32 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 0.00000 0.00001 SL = 0.0000016 +- 0.0000111 Tm^2/m^n 13:16:32 Magnet Strength Measurement Harmonic Number = 1 SL = 0.0000016 +- 0.0000111 Tm^2/m^n 13:16:35 Position moved: 0.000000 m 13:16:41 Position moved: 0.000000 m 13:16:44 Magnet system MAIN current ramping to 0.0000 A...