SLAC Magnetic Measurements
Date: 07-16-2007
Time: 17:37:28
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 07-16-2007
Time: 17:29:29
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-15
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 2
Measurement Type: Z Scans
Operator: AW
Comment: x= 0.026465 y=0.000185   Added x-shims: 1-screw .16 in at pole11, 2-screw .17 in at 58 and 141.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-15\DATASET0001\Rough Tuning\Z Scans\Run 002\bscanz.dat
Temperature (C)
L143-112000-15:--> top_start 20.08 --> top_mid 20.06 --> top_end 19.99 --> bot 20.04 --> granite 20.03 --> Air 19.92 
Axes position (m) X:0.026464 Y:0.000186
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000574 V
Vy_0i = -0.000475 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000541 V
Vy_0f = -0.000475 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000574 V, increment = 1.630E-09 V
Vy:offset = -0.000475 V, increment = 1.008E-18 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\L143-112000-15\DATASET0001\Rough Tuning\Z Scans\Run 002\
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 = 26654.560000
Electron energy = 13.620455 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.491738
Nominal radiation wavelength = 1.498197e-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 = 1.271863 T, RMS = 0.003909 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000021 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000037 m
Average Undulator Period = 0.029997 m

Hall Probe Overall Field Integrals:
Int Bx dz =   7.0478e-005 Tm
Int Int Bx dz dz =   1.4449e-004 Tm^2
Int By dz =   3.6475e-004 Tm
Int Int By dz dz =   1.1517e-003 Tm^2

Trajectory Exit Information:
X at exit =   2.5350e-005 m
X slope at exit =   8.0282e-006
Y at exit =  -3.1803e-006 m
Y slope at exit =  -1.5512e-006

Calculated Undulator Parameters:
Keff = 3.507764
Beff = 1.252362 T
Lambda_rad = 1.509895e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.03346e-009
Undulator Period = 0.029997 m
Radiation Wavelength =   1.50989e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 38.245911 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49820e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     847.249 deg, mod_360 =     127.249 deg
Phase Change Through Undulator (Poles Between End Poles) =   39293.416 deg, mod_360 =      53.416 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     869.851 deg, mod_360 =     149.851 deg
Phase Change Of Cell =   41010.517 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     330.517 deg