SLAC Magnetic Measurements
Date: 05-17-2007
Time: 11:39:07
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 05-17-2007
Time: 11:29:39
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-19
DATASET Number: 1
Tuning Stage: Fine Tuning
Run Number: 22
Measurement Type: Z Scans
Operator: YL
Comment: find y at minK; before final scans
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-19\DATASET0001\Fine Tuning\Z Scans\Run 022\bscanz.dat
Temperature (C)
L143-112000-19:--> top_end 20.01 --> top_mid 20.04 --> top_start 20.09 --> bot 20.06 --> Air 19.94 --> granite 20.01 
Axes position (m) X:0.030295 Y:0.000485
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001391 V
Vy_0i = -0.000930 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001372 V
Vy_0f = -0.000963 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001391 V, increment = -8.569E-10 V
Vy:offset = -0.000930 V, increment = -1.574E-09 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\L143-112000-19\DATASET0001\Fine Tuning\Z Scans\Run 022\
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 = -0.000001 T
Correction, By additive constant = -0.000013 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26684.300000
Electron energy = 13.635652 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.498180
Nominal radiation wavelength = 1.499602e-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
Save as final result = 0
Result file directory = c:\magdata\slac_und_2\
Result file name = zscan_xn0060yp0002.dat
Figures close on exit = 1
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 = -0.000001 T
CORR_BY_ADD = -0.000013 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 = 1.275111 T, RMS = 0.006617 T
Peak Field Spacing: Ave = 0.015002 m, RMS = 0.000028 m
Zero Field Spacing: Ave = 0.015002 m, RMS = 0.000041 m
Average Undulator Period = 0.030003 m

Hall Probe Overall Field Integrals:
Int Bx dz =   2.6300e-006 Tm
Int Int Bx dz dz =   2.6978e-005 Tm^2
Int By dz =  -7.5329e-007 Tm
Int Int By dz dz =  -1.2389e-005 Tm^2

Trajectory Exit Information:
X at exit =  -2.7239e-007 m
X slope at exit =  -1.6562e-008
Y at exit =  -5.9314e-007 m
Y slope at exit =  -5.7822e-008

Calculated Undulator Parameters:
Keff = 3.498126
Beff = 1.248664 T
Lambda_rad = 1.499728e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.99854e-009
Undulator Period = 0.030003 m
Radiation Wavelength =   1.49973e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = 0.000000 deg, RMS = 3.567443 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49960e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     814.410 deg, mod_360 =      94.410 deg
Phase Change Through Undulator (Poles Between End Poles) =   39043.900 deg, mod_360 =     163.900 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     826.136 deg, mod_360 =     106.136 deg
Phase Change Of Cell =   40684.446 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =       4.446 deg