SLAC Magnetic Measurements
Date: 12-14-2010
Time: 16:37:22
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 12-14-2010
Time: 16:32:09
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 186
Measurement Type: Z Scans
Operator: YL
Comment: check K vs.phase; gap=25mm; Phase=-1/8
Session first run: 160
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 186\bscanz.dat
Temperature (C)
Axes position (m) X:0.030473 Y:0.000590
Initial Hall Probe Zero Measurements:
Vx_0i = 0.000907 V
Vy_0i = 0.000830 V
Vz_0i = 0.000000 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.000962 V
Vy_0f = 0.000824 V
Vz_0f = 0.000000 V
Offset Correction Voff = offset+index*increment
index = 0,1...20100
Vx:offset = 0.000907 V, increment = 2.741E-09 V
Vy:offset = 0.000830 V, increment = -2.731E-10 V
Vz:offset = 0.000000 V, increment = 0.000E+00 V
Hall Probe Calibration File:
Y: C:\CVI\current_calib\SENIS_24-06\SENIS_24-06_y.ini
X: c:\cvi\current_calib\HALLx_calib_poly_fit_file.dat
Z: c:\cvi\current_calib\HALLz_calib_poly_fit_file.dat
Reference Magnet Measurements:
Bx_ref = 0.0000xx (T)
By_ref = 0.0000xx (T)
Magnetic Field Measurements vs Z

Analysis Parameters:
Input file directory = S:\MagData\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 186\
Input file name = x+00000_y+000_bscanz.dat
Input file type = ZVXYBXYH
Correction required = 1
Correction, Bx multiplicative factor = 1.000000 
Correction, By multiplicative factor = 1.000000 
Correction, Bx additive constant = -0.000325 T
Correction, By additive constant = 0.000060 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26686.340000
Electron energy = 13.636695 Gev
Nominal undulator period = 0.056900 m
Nominal K value = 2.348000
Nominal radiation wavelength = 1.500699e-010 m
Number of undulator poles = 133
Number of end poles (used in analysis) = 3
Cell length = 3.698500 m
Nominal phase change through cell = 408.407045 rad
Nominal phase of pole after end poles = 6.283185 rad
Save as final result = 0
Result file directory = c:\magdata\slac_und_2\
Result file name = zscan_xn0060yp0002.dat
Figures close on exit = 0
Figures visible = 1

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The Measured Fields Were Corrected:
Bx_corr = CORR_BX_MULT * Bx + CORR_BX_ADD + CORR_BX_ADD_FILE
By_corr = CORR_BY_MULT * By + CORR_BY_ADD + CORR_BY_ADD_FILE
Parameters:
CORR_BX_MULT = 1.000000 
CORR_BY_MULT = 1.000000 
CORR_BX_ADD = -0.000325 T
CORR_BY_ADD = 0.000060 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 133
Number of End Poles (excluded in statistics) = 3
Peak Fields: Ave = 0.411930 T, RMS = 0.004077 T
Peak Field Spacing: Ave = 0.028519 m, RMS = 0.000055 m
Zero Field Spacing: Ave = 0.028516 m, RMS = 0.000050 m
Average Undulator Period = 0.057040 m