SLAC Magnetic Measurements
Date: 09-17-2010
Time: 09:17:35
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 09-17-2010
Time: 09:06:21
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 4
Measurement Type: Z Scans
Operator: YL
Comment: find Y at min K; K repeatability test, gap 13.996mm, run1
Session first run: 1
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 004\bscanz.dat
Temperature (C)
Axes position (m) X:0.030604 Y:0.000360
Initial Hall Probe Zero Measurements:
Vx_0i = 0.002855 V
Vy_0i = 0.001008 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.002620 V
Vy_0f = 0.000950 V
Offset Correction Voff = offset+index*increment
index = 0,1...20350
Vx:offset = 0.002855 V, increment = -1.152E-08 V
Vy:offset = 0.001008 V, increment = -2.852E-09 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 004\
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 = -0.000080 T
Correction, By additive constant = 0.000080 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 = 4.270000
Nominal radiation wavelength = 4.041405e-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 = -0.000080 T
CORR_BY_ADD = 0.000080 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 = 0.788532 T, RMS = 0.003902 T
Peak Field Spacing: Ave = 0.028518 m, RMS = 0.000135 m
Zero Field Spacing: Ave = 0.028516 m, RMS = 0.000053 m
Average Undulator Period = 0.057039 m