SLAC Magnetic Measurements
Date: 05-14-2007
Time: 19:10:21
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 05-14-2007
Time: 19:04:55
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-23
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 5
Measurement Type: Z Scans
Operator: AW
Comment: x=0.027848, y=0.000241  2 turns out in x-shims at 125.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-23\DATASET0001\Rough Tuning\Z Scans\Run 005\bscanz.dat
Temperature (C)
L143-112000-23:--> top_start 20.20 --> top_mid 20.18 --> top_end 20.09 --> bot 20.16 --> granite 20.12 --> Air 20.09 
Axes position (m) X:0.027848 Y:0.000241
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000376 V
Vy_0i = -0.000370 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000332 V
Vy_0f = -0.000387 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000376 V, increment = 2.222E-09 V
Vy:offset = -0.000370 V, increment = -8.865E-10 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\L143-112000-23\DATASET0001\Rough Tuning\Z Scans\Run 005\
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 = 0.000000 T
Correction, By additive constant = 0.000000 T
Correction Bxy additive file = S:\Magdata\Earth Field Correction\earth_field_corr.dat
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26625.060000
Electron energy = 13.605381 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.485345
Nominal radiation wavelength = 1.496800e-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 = 0.000000 T
CORR_BY_ADD = 0.000000 T
CORR_BX_ADD_FILE = S:\Magdata\Earth Field Correction\earth_field_corr.dat
CORR_BY_ADD_FILE = S:\Magdata\Earth Field Correction\earth_field_corr.dat
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 226
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 1.259367 T, RMS = 0.004390 T
Peak Field Spacing: Ave = 0.014998 m, RMS = 0.000023 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000043 m
Average Undulator Period = 0.029997 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -2.1794e-005 Tm
Int Int Bx dz dz =  -1.5102e-004 Tm^2
Int By dz =  -5.8753e-004 Tm
Int Int By dz dz =  -6.4939e-004 Tm^2

Trajectory Exit Information:
X at exit =  -1.4309e-005 m
X slope at exit =  -1.2946e-005
Y at exit =   3.3277e-006 m
Y slope at exit =   4.8023e-007

Calculated Undulator Parameters:
Keff = 3.457250
Beff = 1.234349 T
Lambda_rad = 1.475997e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.92055e-009
Undulator Period = 0.029997 m
Radiation Wavelength =   1.47600e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 11.945216 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49680e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     832.277 deg, mod_360 =     112.277 deg
Phase Change Through Undulator (Poles Between End Poles) =   38535.110 deg, mod_360 =      15.110 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     844.559 deg, mod_360 =     124.559 deg
Phase Change Of Cell =   40211.945 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =    -468.055 deg