SLAC Magnetic Measurements
Date: 10-22-2010
Time: 11:12:59
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 10-22-2010
Time: 11:04:18
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 71
Measurement Type: Z Scans
Operator: YL
Comment: Gap set to 35.597 mm;at min K #3
Session first run: 59
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 071\bscanz.dat
Temperature (C)
Axes position (m) X:0.029950 Y:0.000965
Initial Hall Probe Zero Measurements:
Vx_0i = 0.000351 V
Vy_0i = 0.000835 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.000366 V
Vy_0f = 0.000842 V
Offset Correction Voff = offset+index*increment
index = 0,1...20350
Vx:offset = 0.000351 V, increment = 7.295E-10 V
Vy:offset = 0.000835 V, increment = 3.603E-10 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
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 071\
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 = -0.000040 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 = 1.334000
Nominal radiation wavelength = 7.549445e-011 m
Number of undulator poles = 131
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 = 9.424778 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 = -0.000040 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 = 131
Number of End Poles (excluded in statistics) = 3
Peak Fields: Ave = 0.249999 T, RMS = 0.000850 T
Peak Field Spacing: Ave = 0.028517 m, RMS = 0.000039 m
Zero Field Spacing: Ave = 0.028519 m, RMS = 0.000045 m
Average Undulator Period = 0.057034 m