SLAC Magnetic Measurements Date: 11-10-2025 Time: 13:55:50 Project: FACET-II Magnet Type: Dipole Magnet Name: 4595 Serial Number: 30822-4 Run Number: 11 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 13:56:15 Position moved: 0.000000 m 13:56:17 Magnet Current for MAIN, Imag = 0.0013 A Vtrans = 0.000112 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:56:18 Magnet Current for MAIN, Imag = 0.0015 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:56:19 Magnet Current for MAIN, Imag = 0.0024 A Vtrans = 0.000199 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:56:20 Magnet Current for MAIN, Imag = 0.0015 A Vtrans = 0.000124 V, Factor V/A = 0.083333 V/A, Zero Current = 0.000000 A 13:56:20 Magnet Avgerage Current Measurement for MAIN : Imag = 0.0017 +- 0.0004 A 13:57:12 Initial Zero Current Measurement for MAIN, Imag_zero = 0.001677 A 13:57:12 Ambient Measurement Device(s) Being Used, type = None 13:57:13 Magnet Voltage Measurement Device(s) Being Used, type = HP34970 13:57:13 Temperature Measurement Device(s) Being Used, type = HPTHERM_HP34970 13:57:13 Ambient Measurement Device(s) Being Used, type = None 13:57:16 Position moved: 0.000000 m 13:57:19 Magnet system MAIN current ramping to 14.5000 A... 13:57:29 Magnet system MAIN current ramping to -12.7600 A... 13:57:46 Magnet system MAIN current ramping to 11.2288 A... 13:58:02 Magnet system MAIN current ramping to -9.8813 A... 13:58:16 Magnet system MAIN current ramping to 8.6956 A... 13:58:28 Magnet system MAIN current ramping to -7.6521 A... 13:58:40 Magnet system MAIN current ramping to 6.7339 A... 13:58:50 Magnet system MAIN current ramping to -5.9258 A... 13:59:00 Magnet system MAIN current ramping to 5.2147 A... 13:59:09 Magnet system MAIN current ramping to -4.5889 A... 13:59:18 Magnet system MAIN current ramping to 4.0383 A... 13:59:25 Magnet system MAIN current ramping to -3.5537 A... 13:59:33 Magnet system MAIN current ramping to 3.1272 A... 13:59:39 Magnet system MAIN current ramping to -2.7520 A... 13:59:46 Magnet system MAIN current ramping to 2.4217 A... 13:59:52 Magnet system MAIN current ramping to -2.1311 A... 13:59:57 Magnet system MAIN current ramping to 1.8754 A... 14:00:03 Magnet system MAIN current ramping to -1.6503 A... 14:00:08 Magnet system MAIN current ramping to 1.4523 A... 14:00:13 Magnet system MAIN current ramping to -1.2780 A... 14:00:18 Magnet system MAIN current ramping to 1.1247 A... 14:00:22 Magnet system MAIN current ramping to -0.9897 A... 14:00:27 Magnet system MAIN current ramping to 0.8709 A... 14:00:31 Magnet system MAIN current ramping to -0.7664 A... 14:00:36 Magnet system MAIN current ramping to 0.6744 A... 14:00:40 Magnet system MAIN current ramping to -0.5935 A... 14:00:44 Magnet system MAIN current ramping to 0.5223 A... 14:00:48 Magnet system MAIN current ramping to -0.4596 A... 14:00:52 Magnet system MAIN current ramping to 0.4045 A... 14:00:56 Magnet system MAIN current ramping to -0.3559 A... 14:00:59 Magnet system MAIN current ramping to 0.3132 A... 14:01:03 Magnet system MAIN current ramping to -0.2756 A... 14:01:07 Magnet system MAIN current ramping to 0.2426 A... 14:01:11 Magnet system MAIN current ramping to -0.2135 A... 14:01:14 Magnet system MAIN current ramping to 0.1878 A... 14:01:18 Magnet system MAIN current ramping to -0.1653 A... 14:01:21 Magnet system MAIN current ramping to 0.1455 A... 14:01:25 Magnet system MAIN current ramping to -0.1280 A... 14:01:29 Magnet system MAIN current ramping to 0.1126 A... 14:01:32 Magnet system MAIN current ramping to -0.0991 A... 14:01:36 Magnet system MAIN current ramping to 0.0872 A... 14:01:39 Magnet system MAIN current ramping to -0.0768 A... 14:01:43 Magnet system MAIN current ramping to 0.0675 A... 14:01:46 Magnet system MAIN current ramping to -0.0595 A... 14:01:50 Magnet system MAIN current ramping to 0.0523 A... 14:01:53 Magnet system MAIN current ramping to -0.0460 A... 14:01:57 Magnet system MAIN current ramping to 0.0405 A... 14:02:00 Magnet system MAIN current ramping to -0.0357 A... 14:02:04 Magnet system MAIN current ramping to 0.0000 A... 14:04:05 Magnet Current for MAIN, Imag = 0.0001 A Vtrans = 0.000149 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:04:06 Main (V) Voltage Measurement, V = -0.000050 V 14:04:13 Temperature Measurement, Probe Number = 0, T = 24.869000 C 14:04:14 Temperature Measurement, Probe Number = 1, T = 24.494000 C 14:04:15 Temperature Measurement, Probe Number = 2, T = 24.189000 C 14:04:16 Temperature Measurement, Probe Number = 3, T = 24.569000 C 14:04:16 Magnet Test Parameter Measurements P0 = MAIN, Value = 0.00 P1 = Main (V), Value = -0.00 P2 = Coil_Top_Inside, Value = 24.87 P3 = Coil_Top_Outside, Value = 24.49 P4 = Core, Value = 24.19 P5 = Ambient, Value = 24.57 14:04:16 Magnetic Field Measurement Measuring the magnet strength... 14:04:16 Integrated Voltage Measurement... 14:04:17 Magnet Current for MAIN, Imag = -0.0012 A Vtrans = 0.000037 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:04:26 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005384 Vs 14:04:35 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004900 Vs 14:04:36 Magnet Current for MAIN, Imag = -0.0005 A Vtrans = 0.000100 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:04:44 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005168 Vs 14:04:53 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004666 Vs 14:04:54 Magnet Current for MAIN, Imag = -0.0006 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:05:03 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005408 Vs 14:05:11 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004885 Vs 14:05:12 Magnet Current for MAIN, Imag = 0.0004 A Vtrans = 0.000174 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:05:21 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005039 Vs 14:05:29 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005012 Vs 14:05:29 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000000192 +- 0.000000103 Vs 14:05:29 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = -0.000000192 +- 0.000000103 Vs BL = -0.00001922 +- 0.00001033 Tm 14:05:33 Position moved: 0.000000 m 14:05:33 BL vs X Fit Coefficients: Cn sigCn n (Tm/m^n) ----- --------+-------- 0 -0.00002 0.00001 Compute Fit Residuals: X0 BL sigBL BLfit BL-BLfit (m) (Tm) (Tm) (Tm) (Tm) ----------- --------+-------- -------- -------- 0.0000000 -0.00002 0.00001 -0.00002 0.00000 14:05:33 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 -0.00002 0.00001 SL = -0.0000192 +- 0.0000103 Tm^2/m^n 14:05:33 Magnet Strength Measurement Harmonic Number = 1 SL = -0.0000192 +- 0.0000103 Tm^2/m^n 14:05:36 Position moved: 0.000000 m 14:06:52 Magnet system MAIN current ramping to 14.5000 A... 14:07:02 Magnet system MAIN current ramping to -12.7600 A... 14:07:20 Magnet system MAIN current ramping to 11.2288 A... 14:07:35 Magnet system MAIN current ramping to -9.8813 A... 14:07:49 Magnet system MAIN current ramping to 8.6956 A... 14:08:02 Magnet system MAIN current ramping to -7.6521 A... 14:08:13 Magnet system MAIN current ramping to 6.7339 A... 14:08:24 Magnet system MAIN current ramping to -5.9258 A... 14:08:33 Magnet system MAIN current ramping to 5.2147 A... 14:08:42 Magnet system MAIN current ramping to -4.5889 A... 14:08:51 Magnet system MAIN current ramping to 4.0383 A... 14:08:59 Magnet system MAIN current ramping to -3.5537 A... 14:09:06 Magnet system MAIN current ramping to 3.1272 A... 14:09:13 Magnet system MAIN current ramping to -2.7520 A... 14:09:19 Magnet system MAIN current ramping to 2.4217 A... 14:09:25 Magnet system MAIN current ramping to -2.1311 A... 14:09:31 Magnet system MAIN current ramping to 1.8754 A... 14:09:36 Magnet system MAIN current ramping to -1.6503 A... 14:09:41 Magnet system MAIN current ramping to 1.4523 A... 14:09:46 Magnet system MAIN current ramping to -1.2780 A... 14:09:51 Magnet system MAIN current ramping to 1.1247 A... 14:09:56 Magnet system MAIN current ramping to -0.9897 A... 14:10:00 Magnet system MAIN current ramping to 0.8709 A... 14:10:05 Magnet system MAIN current ramping to -0.7664 A... 14:10:09 Magnet system MAIN current ramping to 0.6744 A... 14:10:13 Magnet system MAIN current ramping to -0.5935 A... 14:10:17 Magnet system MAIN current ramping to 0.5223 A... 14:10:21 Magnet system MAIN current ramping to -0.4596 A... 14:10:25 Magnet system MAIN current ramping to 0.4045 A... 14:10:29 Magnet system MAIN current ramping to -0.3559 A... 14:10:33 Magnet system MAIN current ramping to 0.3132 A... 14:10:36 Magnet system MAIN current ramping to -0.2756 A... 14:10:40 Magnet system MAIN current ramping to 0.2426 A... 14:10:44 Magnet system MAIN current ramping to -0.2135 A... 14:10:48 Magnet system MAIN current ramping to 0.1878 A... 14:10:51 Magnet system MAIN current ramping to -0.1653 A... 14:10:55 Magnet system MAIN current ramping to 0.1455 A... 14:10:58 Magnet system MAIN current ramping to -0.1280 A... 14:11:02 Magnet system MAIN current ramping to 0.1126 A... 14:11:06 Magnet system MAIN current ramping to -0.0991 A... 14:11:09 Magnet system MAIN current ramping to 0.0872 A... 14:11:13 Magnet system MAIN current ramping to -0.0768 A... 14:11:16 Magnet system MAIN current ramping to 0.0675 A... 14:11:20 Magnet system MAIN current ramping to -0.0595 A... 14:11:23 Magnet system MAIN current ramping to 0.0523 A... 14:11:27 Magnet system MAIN current ramping to -0.0460 A... 14:11:30 Magnet system MAIN current ramping to 0.0405 A... 14:11:33 Magnet system MAIN current ramping to -0.0357 A... 14:11:37 Magnet system MAIN current ramping to 0.0000 A... 14:14:11 Magnet Current for MAIN, Imag = 0.0004 A Vtrans = 0.000174 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:14:12 Main (V) Voltage Measurement, V = -0.000037 V 14:14:16 Temperature Measurement, Probe Number = 0, T = 24.949000 C 14:14:16 Temperature Measurement, Probe Number = 1, T = 24.556000 C 14:14:17 Temperature Measurement, Probe Number = 2, T = 24.258000 C 14:14:18 Temperature Measurement, Probe Number = 3, T = 24.752000 C 14:14:18 Magnet Test Parameter Measurements P0 = MAIN, Value = 0.00 P1 = Main (V), Value = -0.00 P2 = Coil_Top_Inside, Value = 24.95 P3 = Coil_Top_Outside, Value = 24.56 P4 = Core, Value = 24.26 P5 = Ambient, Value = 24.75 14:14:18 Magnetic Field Measurement Measuring the magnet strength... 14:14:18 Integrated Voltage Measurement... 14:14:19 Magnet Current for MAIN, Imag = -0.0006 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:14:29 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005061 Vs 14:14:37 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004930 Vs 14:14:38 Magnet Current for MAIN, Imag = -0.0011 A Vtrans = 0.000050 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:14:47 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005535 Vs 14:14:55 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000004975 Vs 14:14:56 Magnet Current for MAIN, Imag = -0.0009 A Vtrans = 0.000062 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:15:05 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005095 Vs 14:15:14 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005045 Vs 14:15:15 Magnet Current for MAIN, Imag = -0.0006 A Vtrans = 0.000087 V, Factor V/A = 0.083333 V/A, Zero Current = 0.001677 A 14:15:23 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000005410 Vs 14:15:32 Integrated Voltage Measurement X0 = 0.0000000 m, Delta X = -0.0100000 m VT = -0.000005072 Vs 14:15:32 Integrated Voltage Average and RMS of Measurements X0 = 0.0000000 m, Delta X = 0.0100000 m VT = -0.000000135 +- 0.000000099 Vs 14:15:32 Integrated Field Strength, Average and RMS of Measurements X0 = 0.0000000 m, dx = 0.0100000 m, Nturns = 1.0 VT = -0.000000135 +- 0.000000099 Vs BL = -0.00001349 +- 0.00000988 Tm 14:15:36 Position moved: 0.000000 m 14:15:36 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 14:15:36 Magnet Strength Calculation Harmonic Number = 1 Number Of X0 Positions = 1 X0 BL sigBL (m) (Tm) (Tm) -------- --------+-------- 0.0000 -0.00001 0.00001 SL = -0.0000135 +- 0.0000099 Tm^2/m^n 14:15:36 Magnet Strength Measurement Harmonic Number = 1 SL = -0.0000135 +- 0.0000099 Tm^2/m^n 14:15:38 Position moved: 0.000000 m 14:15:47 Position moved: 0.000000 m 14:15:50 Magnet system MAIN current ramping to 0.0000 A...