SLAC Magnetic Measurements
Date: 03-23-2010
Time: 16:05:03
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 03-23-2010
Time: 16:01:02
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: ECKO7-20-PPM
DATASET Number: 1
Tuning Stage: Fine Tuning
Run Number: 29
Measurement Type: Z Scans
Operator: YL
Comment: tuning, find Y at min K
Session first run: 29
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\ECKO7-20-PPM\DATASET0001\Fine Tuning\Z Scans\Run 029\bscanz.dat
Temperature (C)
ECKO7-20-PPM:--> T5 20.03 --> T2 20.13 --> T1 20.13 --> T3 20.15 --> Air 20.20 --> T4 20.12 
Axes position (m) X:0.035754 Y:0.000427
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001292 V
Vy_0i = -0.002889 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001261 V
Vy_0f = -0.002885 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001292 V, increment = -1.492E-09 V
Vy:offset = -0.002889 V, increment = 1.910E-10 V
Hall Probe Calibration File:
Y: c:\CVI\current_calib\Sentron_441\Sentron_441_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\ECKO7-20-PPM\DATASET0001\Fine Tuning\Z Scans\Run 029\
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 = -0.000006 T
Correction, By additive constant = -0.000006 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 233.317455
Electron energy = 0.119225 Gev
Nominal undulator period = 0.020000 m
Nominal K value = 1.209000
Nominal radiation wavelength = 3.179528e-007 m
Number of undulator poles = 24
Number of end poles (used in analysis) = 4
Cell length = 0.170000 m
Nominal phase change through cell = 53.407075 rad
Nominal phase of pole after end poles = 0.000000 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 = -0.000006 T
CORR_BY_ADD = -0.000006 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 24
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 0.644729 T, RMS = 0.009993 T
Peak Field Spacing: Ave = 0.009999 m, RMS = 0.000115 m
Zero Field Spacing: Ave = 0.009993 m, RMS = 0.000106 m
Average Undulator Period = 0.019998 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -2.7781e-006 Tm
Int Int Bx dz dz =  -2.8310e-006 Tm^2
Int By dz =  -2.4005e-006 Tm
Int Int By dz dz =  -8.4060e-006 Tm^2

Trajectory Exit Information:
X at exit =  -2.1137e-005 m
X slope at exit =  -6.0362e-006
Y at exit =   7.1187e-006 m
Y slope at exit =   6.9856e-006

Calculated Undulator Parameters:
Keff = 1.209821
Beff = 0.647918 T
Lambda_rad = 3.180989e-007 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   1.59068e-005
Undulator Period = 0.019998 m
Radiation Wavelength =   3.18099e-007 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = -0.000000 deg, Phase error RMS = 6.475134 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   3.17953e-007 m
Cell Length = 0.170000 m
Number Of End Poles = 4
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = 183.531137 deg, RMS = 7.304215 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = 182.149266 deg, RMS = 8.067021 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = 184.703430 deg, RMS = 7.571957 deg
Cell:
  Phase Change Of Cell =    3066.521 deg
  Nominal Phase Change Of Cell =    3060.000 deg
  Phase Error Of Cell =       6.521 deg