SLAC Magnetic Measurements
Date: 01-29-2016
Time: 14:09:58
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 01-29-2016
Time: 14:06:33
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-18
DATASET Number: 6
Tuning Stage: Fine Tuning
Run Number: 14
Measurement Type: Z Scans
Operator: YL
Comment: find Y at min K; after granite re-alignment
Session first run: 14
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-18\DATASET0006\Fine Tuning\Z Scans\Run 014\bscanz.dat
Temperature (C)
L143-112000-13:--> T1 0.0 --> T2 0.0 --> T5 0.0 --> T3 0.0 --> Air 0.0 --> T4 0.0 --> KRefM 0.0 
Axes position (m) X:0.029207 Y:0.000470
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001112 V
Vy_0i = -0.003133 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001102 V
Vy_0f = -0.003124 V
Offset Correction Voff = offset+index*increment
index = 0,1...20000
Vx:offset = 0.001112 V, increment = -4.996E-10 V
Vy:offset = -0.003133 V, increment = 4.586E-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\L143-112000-18\DATASET0006\Fine Tuning\Z Scans\Run 014\
Input file name = x+00000_y+101_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 = -0.000016 T
Correction, By additive constant = -0.000012 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26627.100000
Electron energy = 13.606423 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.485788
Nominal radiation wavelength = 1.496897e-10 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 = -0.000016 T
CORR_BY_ADD = -0.000012 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 = 1.271752 T, RMS = 0.006538 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000021 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000033 m
Average Undulator Period = 0.029997 m

Hall Probe Overall Field Integrals:
Int Bx dz =   -9.8054e-05 Tm
Int Int Bx dz dz =   -1.8090e-04 Tm^2
Int By dz =    5.5695e-06 Tm
Int Int By dz dz =   -1.7636e-05 Tm^2

Trajectory Exit Information:
X at exit =   -3.8857e-07 m
X slope at exit =    1.2271e-07
Y at exit =    3.9857e-06 m
Y slope at exit =    2.1604e-06

Calculated Undulator Parameters:
Keff = 3.486235
Beff = 1.244661 T
Lambda_rad = 1.497102e-10 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =    4.99076e-09
Undulator Period = 0.029997 m
Radiation Wavelength =    1.49710e-10 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = 0.000000 deg, Phase error RMS = 3.337317 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =    1.49690e-10 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = -0.667616 deg, RMS = 5.756888 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = 0.076998 deg, RMS = 3.791456 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = 0.974764 deg, RMS = 5.320064 deg
Cell:
  Phase Change Of Cell =   40684.285 deg
  Nominal Phase Change Of Cell =   40680.000 deg
  Phase Error Of Cell =       4.285 deg