SLAC Magnetic Measurements
Date: 10-26-2010
Time: 10:13:51
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 10-26-2010
Time: 10:08:39
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 81
Measurement Type: Z Scans
Operator: YL
Comment: Check K repeatibility; Gap set to 35.600mm; run1
Session first run: 71
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 081\bscanz.dat
Temperature (C)
Axes position (m) X:0.029950 Y:0.000965
Initial Hall Probe Zero Measurements:
Vx_0i = 0.000502 V
Vy_0i = 0.000863 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.000544 V
Vy_0f = 0.000833 V
Offset Correction Voff = offset+index*increment
index = 0,1...20350
Vx:offset = 0.000502 V, increment = 2.074E-09 V
Vy:offset = 0.000863 V, increment = -1.485E-09 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\EPU\DATASET0001\Rough Tuning\Z Scans\Run 081\
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 = -0.000040 T
Correction, By additive constant = 0.000060 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26686.340000
Electron energy = 13.636695 Gev
Nominal undulator period = 0.056900 m
Nominal K value = 1.334000
Nominal radiation wavelength = 7.549445e-011 m
Number of undulator poles = 131
Number of end poles (used in analysis) = 3
Cell length = 3.698500 m
Nominal phase change through cell = 408.407045 rad
Nominal phase of pole after end poles = 9.424778 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 = -0.000040 T
CORR_BY_ADD = 0.000060 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 131
Number of End Poles (excluded in statistics) = 3
Peak Fields: Ave = 0.250182 T, RMS = 0.000820 T
Peak Field Spacing: Ave = 0.028517 m, RMS = 0.000039 m
Zero Field Spacing: Ave = 0.028519 m, RMS = 0.000045 m
Average Undulator Period = 0.057034 m

Hall Probe Overall Field Integrals:
Int Bx dz =   7.8339e-005 Tm
Int Int Bx dz dz =   3.0918e-004 Tm^2
Int By dz =   2.2687e-004 Tm
Int Int By dz dz =   1.0939e-004 Tm^2

Trajectory Exit Information:
X at exit =   2.4048e-006 m
X slope at exit =   4.9876e-006
Y at exit =  -6.7970e-006 m
Y slope at exit =  -1.7222e-006

Calculated Undulator Parameters:
Keff = 1.335512
Beff = 0.250779 T
Lambda_rad = 7.575357e-011 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   1.32821e-009
Undulator Period = 0.057034 m
Radiation Wavelength =   7.57536e-011 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = -0.000000 deg, RMS = 7.342260 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   7.54945e-011 m
Cell Length = 3.698500 m
Number Of End Poles = 3
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = 22.789326 deg, RMS = 7.075700 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = 73.223190 deg, RMS = 24.018696 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = 15.453093 deg, RMS = 7.458823 deg
Cell:
  Phase Change Of Cell =   23520.022 deg
  Nominal Phase Change Of Cell =   23400.000 deg
  Phase Error Of Cell =     120.022 deg