SLAC Magnetic Measurements
Date: 04-10-2007
Time: 17:52:14
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 04-10-2007
Time: 17:47:35
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-06
DATASET Number: 1
Tuning Stage: Fine Tuning
Run Number: 16
Measurement Type: Z Scans
Operator: YL
Comment: x-shim on #191
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-06\DATASET0001\Fine Tuning\Z Scans\Run 016\bscanz.dat
Temperature (C)
L143-112000-06:--> top_end 20.09 --> top_mid 20.07 --> top_start 20.11 --> bot 20.11 --> Air 20.10 --> granite 20.09 
Axes position (m) X:0.029846 Y:0.000500
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001344 V
Vy_0i = -0.000833 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001361 V
Vy_0f = -0.000873 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001344 V, increment = 8.008E-10 V
Vy:offset = -0.000833 V, increment = -1.887E-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\L143-112000-06\DATASET0001\Fine Tuning\Z Scans\Run 016\
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 = -0.000005 T
Correction, By additive constant = 0.000000 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26629.140000
Electron energy = 13.607466 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.486231
Nominal radiation wavelength = 1.496995e-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 = 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 = -0.000005 T
CORR_BY_ADD = 0.000000 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 = 1.270374 T, RMS = 0.006232 T
Peak Field Spacing: Ave = 0.015002 m, RMS = 0.000033 m
Zero Field Spacing: Ave = 0.015003 m, RMS = 0.000043 m
Average Undulator Period = 0.030005 m

Hall Probe Overall Field Integrals:
Int Bx dz =   2.5636e-006 Tm
Int Int Bx dz dz =   4.3914e-005 Tm^2
Int By dz =  -7.8448e-005 Tm
Int Int By dz dz =  -9.4719e-005 Tm^2

Trajectory Exit Information:
X at exit =  -2.0868e-006 m
X slope at exit =  -1.7283e-006
Y at exit =  -9.6749e-007 m
Y slope at exit =  -5.6480e-008

Calculated Undulator Parameters:
Keff = 3.483451
Beff = 1.243347 T
Lambda_rad = 1.495205e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.98315e-009
Undulator Period = 0.030005 m
Radiation Wavelength =   1.49521e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 4.189655 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49699e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     849.225 deg, mod_360 =     129.225 deg
Phase Change Through Undulator (Poles Between End Poles) =   39007.322 deg, mod_360 =     127.322 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     845.779 deg, mod_360 =     125.779 deg
Phase Change Of Cell =   40702.327 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =      22.327 deg