SLAC Magnetic Measurements
Date: 09-12-2007
Time: 10:17:46
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 09-12-2007
Time: 10:05:54
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-25
DATASET Number: 1
Tuning Stage: Fine Tuning
Run Number: 8
Measurement Type: Z Scans
Operator: YL
Comment: find y at min K; before final scans
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-25\DATASET0001\Fine Tuning\Z Scans\Run 008\bscanz.dat
Temperature (C)
L143-112000-25:--> top_end 19.90 --> top_mid 19.93 --> top_start 19.96 --> bottom 19.92 --> Air 19.93 --> Granite 19.91 
Axes position (m) X:0.029853 Y:0.000158
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001485 V
Vy_0i = -0.000674 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001503 V
Vy_0f = -0.000668 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001485 V, increment = 8.540E-10 V
Vy:offset = -0.000674 V, increment = 2.640E-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\L143-112000-25\DATASET0001\Fine Tuning\Z Scans\Run 008\
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 = -0.000012 T
Correction, By additive constant = -0.000014 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26673.630000
Electron energy = 13.630200 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.495869
Nominal radiation wavelength = 1.499099e-010 m
Number of undulator poles = 226
Number of end poles (used in analysis) = 4
Cell length = 3.656000 m
Nominal phase change through cell = 709.999940 rad
Nominal phase of pole after end poles = 14.137167 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 = -0.000012 T
CORR_BY_ADD = -0.000014 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 226
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 1.275115 T, RMS = 0.006128 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000023 m
Zero Field Spacing: Ave = 0.015000 m, RMS = 0.000034 m
Average Undulator Period = 0.029999 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -3.3198e-005 Tm
Int Int Bx dz dz =   3.0266e-005 Tm^2
Int By dz =   4.2945e-006 Tm
Int Int By dz dz =  -2.3527e-005 Tm^2

Trajectory Exit Information:
X at exit =  -5.1747e-007 m
X slope at exit =   9.4457e-008
Y at exit =  -6.6570e-007 m
Y slope at exit =   7.3018e-007

Calculated Undulator Parameters:
Keff = 3.495838
Beff = 1.248035 T
Lambda_rad = 1.499015e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.99692e-009
Undulator Period = 0.029999 m
Radiation Wavelength =   1.49901e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = 0.000000 deg, RMS = 3.717494 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49910e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Error Relative To Nominal Radiation Wave In Undulator Center:
  Ave = 1.872550 deg, RMS = 3.863549 deg
Entrance:
Phase Change From Cell Boundary To Pole After End Poles =     814.200 deg
Nominal Phase Change From Cell Boundary To Pole After End Poles =     810.000 deg
Phase Error At Pole After End Poles =       4.200 deg
Center:
Phase Change In Center (Center Poles Between End Poles) =   39044.325 deg
Nominal Phase Change In Center =   39060.000 deg
Phase Error In Center Poles Between End Poles =     -15.675 deg
Exit:
Phase Change From Pole Before End Poles To Cell Boundary =     821.594 deg
Nominal Phase Change From Pole Before End Poles To Cell Boundary =     810.000 deg
Phase Error From Pole Before End Poles To Cell Boundary =      11.594 deg
Cell:
Phase Change Of Cell =   40680.119 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =       0.119 deg