SLAC Magnetic Measurements Date: 11-10-2025 Time: 12:49:20 Project: FACET-II Magnet Type: Dipole Magnet Name: 4595 Serial Number: 30822-4 Run Number: 8 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 12:49:45 Position moved: 0.000000 m 12:49:47 Magnet Current for MAIN, Imag = 0.0001 A Vtrans = 0.000012 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 12:49:48 Magnet Current for MAIN, Imag = 0.0015 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 12:49:49 Magnet Current for MAIN, Imag = 0.0016 A Vtrans = 0.000137 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 12:49:50 Magnet Current for MAIN, Imag = 0.0013 A Vtrans = 0.000112 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 12:49:50 Magnet Avgerage Current Measurement for MAIN : Imag = 0.0012 +- 0.0006 A 12:50:03 Initial Zero Current Measurement for MAIN, Imag_zero = 0.001155 A 12:50:03 Ambient Measurement Device(s) Being Used, type = None 12:50:03 Magnet Voltage Measurement Device(s) Being Used, type = HP34970 12:50:04 Temperature Measurement Device(s) Being Used, type = HPTHERM_HP34970 12:50:04 Ambient Measurement Device(s) Being Used, type = None 12:50:07 Position moved: 0.000000 m 12:50:09 Magnet system MAIN current ramping to 14.5000 A... 12:50:20 Magnet system MAIN current ramping to -12.4700 A... 12:50:37 Magnet system MAIN current ramping to 10.7242 A... 12:50:52 Magnet system MAIN current ramping to -9.2228 A... 12:51:05 Magnet system MAIN current ramping to 7.9316 A... 12:51:17 Magnet system MAIN current ramping to -6.8212 A... 12:51:28 Magnet system MAIN current ramping to 5.8662 A... 12:51:38 Magnet system MAIN current ramping to -5.0450 A... 12:51:47 Magnet system MAIN current ramping to 4.3387 A... 12:51:55 Magnet system MAIN current ramping to -3.7313 A... 12:52:02 Magnet system MAIN current ramping to 3.2089 A... 12:52:09 Magnet system MAIN current ramping to -2.7596 A... 12:52:15 Magnet system MAIN current ramping to 2.3733 A... 12:52:21 Magnet system MAIN current ramping to -2.0410 A... 12:52:27 Magnet system MAIN current ramping to 1.7553 A... 12:52:32 Magnet system MAIN current ramping to -1.5095 A... 12:52:37 Magnet system MAIN current ramping to 1.2982 A... 12:52:42 Magnet system MAIN current ramping to -1.1165 A... 12:52:47 Magnet system MAIN current ramping to 0.9601 A... 12:52:51 Magnet system MAIN current ramping to -0.8257 A... 12:52:56 Magnet system MAIN current ramping to 0.7101 A... 12:53:00 Magnet system MAIN current ramping to -0.6107 A... 12:53:04 Magnet system MAIN current ramping to 0.5252 A... 12:53:08 Magnet system MAIN current ramping to -0.4517 A... 12:53:12 Magnet system MAIN current ramping to 0.3885 A... 12:53:16 Magnet system MAIN current ramping to -0.3341 A... 12:53:19 Magnet system MAIN current ramping to 0.2873 A... 12:53:23 Magnet system MAIN current ramping to -0.2471 A... 12:53:27 Magnet system MAIN current ramping to 0.2125 A... 12:53:31 Magnet system MAIN current ramping to -0.1827 A... 12:53:34 Magnet system MAIN current ramping to 0.1572 A... 12:53:38 Magnet system MAIN current ramping to -0.1351 A... 12:53:41 Magnet system MAIN current ramping to 0.1162 A... 12:53:45 Magnet system MAIN current ramping to -0.1000 A... 12:53:49 Magnet system MAIN current ramping to 0.0860 A... 12:53:52 Magnet system MAIN current ramping to -0.0739 A... 12:53:55 Magnet system MAIN current ramping to 0.0636 A... 12:53:59 Magnet system MAIN current ramping to -0.0547 A... 12:54:02 Magnet system MAIN current ramping to 0.0470 A... 12:54:06 Magnet system MAIN current ramping to -0.0404 A... 12:54:09 Magnet system MAIN current ramping to 0.0348 A... 12:54:13 Magnet system MAIN current ramping to -0.0299 A... 12:54:16 Magnet system MAIN current ramping to 0.0257 A... 12:54:20 Magnet system MAIN current ramping to -0.0221 A... 12:54:23 Magnet system MAIN current ramping to 0.0190 A... 12:54:27 Magnet system MAIN current ramping to -0.0164 A... 12:54:30 Magnet system MAIN current ramping to 0.0141 A... 12:54:34 Magnet system MAIN current ramping to -0.0121 A... 12:54:37 Magnet system MAIN current ramping to 0.0000 A... 12:56:42 Magnet Current for MAIN, Imag = 0.0009 A Vtrans = 0.000174 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001155 A 12:56:43 Main (V) Voltage Measurement, V = -0.000025 V 12:56:50 Temperature Measurement, Probe Number = 0, T = 23.854000 C 12:56:51 Temperature Measurement, Probe Number = 1, T = 23.523000 C 12:56:52 Temperature Measurement, Probe Number = 2, T = 23.210000 C 12:56:53 Temperature Measurement, Probe Number = 3, T = 23.832000 C 12:56:53 Magnet Test Parameter Measurements P0 = MAIN, Value = 0.00 P1 = Main (V), Value = -0.00 P2 = Coil_Top_Inside, Value = 23.85 P3 = Coil_Top_Outside, Value = 23.52 P4 = Core, Value = 23.21 P5 = Ambient, Value = 23.83 12:56:53 Magnetic Field Measurement Measuring the magnet strength... 12:56:53 Integrated Voltage Measurement... 12:56:54 Magnet Current for MAIN, Imag = 0.0018 A Vtrans = 0.000249 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001155 A 12:57:03 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005082 Vs 12:57:12 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005160 Vs 12:57:13 Magnet Current for MAIN, Imag = 0.0006 A Vtrans = 0.000149 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001155 A 12:57:21 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005127 Vs 12:57:30 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004999 Vs 12:57:31 Magnet Current for MAIN, Imag = 0.0000 A Vtrans = 0.000100 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001155 A 12:57:39 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004686 Vs 12:57:48 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005006 Vs 12:57:49 Magnet Current for MAIN, Imag = -0.0003 A Vtrans = 0.000075 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001155 A 12:57:57 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000004911 Vs 12:58:06 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004945 Vs 12:58:06 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = 0.000000038 +- 0.000000080 Vs 12:58:06 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = 0.000000038 +- 0.000000080 Vs BL = 0.00000381 +- 0.00000803 Tm 12:58:10 Position moved: 0.000000 m 12:58:10 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 12:58:10 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 0.00000 0.00001 SL = 0.0000038 +- 0.0000080 Tm^2/m^n 12:58:10 Magnet Strength Measurement Harmonic Number = 1 SL = 0.0000038 +- 0.0000080 Tm^2/m^n 12:58:13 Position moved: 0.000000 m 12:58:32 Position moved: 0.000000 m 12:58:35 Magnet system MAIN current ramping to 0.0000 A...