SLAC Magnetic Measurements
Date: 10-21-2010
Time: 16:19:23
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 10-21-2010
Time: 16:14:07
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 56
Measurement Type: Z Scans
Operator: YL
Comment: Gap set to 34mm;at min K #2
Session first run: 50
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 056\bscanz.dat
Temperature (C)
Axes position (m) X:0.029950 Y:0.000964
Initial Hall Probe Zero Measurements:
Vx_0i = 0.000360 V
Vy_0i = 0.000844 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.000504 V
Vy_0f = 0.000827 V
Offset Correction Voff = offset+index*increment
index = 0,1...20350
Vx:offset = 0.000360 V, increment = 7.053E-09 V
Vy:offset = 0.000844 V, increment = -8.216E-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\EPU\DATASET0001\Rough Tuning\Z Scans\Run 056\
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 = 1.533000
Nominal radiation wavelength = 8.689052e-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 = 0.272996 T, RMS = 0.000910 T
Peak Field Spacing: Ave = 0.028517 m, RMS = 0.000041 m
Zero Field Spacing: Ave = 0.028519 m, RMS = 0.000044 m
Average Undulator Period = 0.057034 m

Hall Probe Overall Field Integrals:
Int Bx dz =   2.7561e-005 Tm
Int Int Bx dz dz =   2.0860e-004 Tm^2
Int By dz =   2.2181e-004 Tm
Int Int By dz dz =   8.4448e-005 Tm^2

Trajectory Exit Information:
X at exit =   1.8565e-006 m
X slope at exit =   4.8762e-006
Y at exit =  -4.5858e-006 m
Y slope at exit =  -6.0592e-007

Calculated Undulator Parameters:
Keff = 1.456247
Beff = 0.273450 T
Lambda_rad = 8.250209e-011 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   1.44653e-009
Undulator Period = 0.057034 m
Radiation Wavelength =   8.25021e-011 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = 0.000000 deg, RMS = 8.132641 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   8.68905e-011 m
Cell Length = 3.698500 m
Number Of End Poles = 3
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = -50.079319 deg, RMS = 23.344441 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = -556.231993 deg, RMS = 328.889206 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = -58.279370 deg, RMS = 26.251851 deg
Cell:
  Phase Change Of Cell =   22258.792 deg
  Nominal Phase Change Of Cell =   23400.000 deg
  Phase Error Of Cell =   -1141.208 deg