SLAC Magnetic Measurements
Date: 09-28-2010
Time: 10:30:22
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 09-28-2010
Time: 10:25:08
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: EPU
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 19
Measurement Type: Z Scans
Operator: YL
Comment: K repeatability test, gap 24.001mm, run0 
Session first run: 17
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\EPU\DATASET0001\Rough Tuning\Z Scans\Run 019\bscanz.dat
Temperature (C)
Axes position (m) X:0.029793 Y:0.000373
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000207 V
Vy_0i = 0.000474 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000235 V
Vy_0f = 0.000448 V
Offset Correction Voff = offset+index*increment
index = 0,1...20350
Vx:offset = -0.000207 V, increment = -1.345E-09 V
Vy:offset = 0.000474 V, increment = -1.240E-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 019\
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 = -0.000008 T
Correction, By additive constant = 0.000050 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 = 4.270000
Nominal radiation wavelength = 4.041405e-010 m
Number of undulator poles = 133
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 = 6.283185 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 = -0.000008 T
CORR_BY_ADD = 0.000050 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 133
Number of End Poles (excluded in statistics) = 3
Peak Fields: Ave = 0.470323 T, RMS = 0.001817 T
Peak Field Spacing: Ave = 0.028519 m, RMS = 0.000062 m
Zero Field Spacing: Ave = 0.028516 m, RMS = 0.000045 m
Average Undulator Period = 0.057039 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -2.1339e-005 Tm
Int Int Bx dz dz =  -2.2196e-005 Tm^2
Int By dz =   1.4385e-004 Tm
Int Int By dz dz =  -6.9527e-005 Tm^2

Trajectory Exit Information:
X at exit =  -1.5285e-006 m
X slope at exit =   3.1624e-006
Y at exit =   4.8796e-007 m
Y slope at exit =   4.6913e-007

Calculated Undulator Parameters:
Keff = 2.510923
Beff = 0.471452 T
Lambda_rad = 1.662887e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   2.91533e-009
Undulator Period = 0.057039 m
Radiation Wavelength =   1.66289e-010 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = -0.000000 deg, RMS = 9.604678 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   4.04141e-010 m
Cell Length = 3.698500 m
Number Of End Poles = 3
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = -685.871749 deg, RMS = 318.841411 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = -6874.216245 deg, RMS = 3899.092622 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = -689.970653 deg, RMS = 321.050249 deg
Cell:
  Phase Change Of Cell =    9635.662 deg
  Nominal Phase Change Of Cell =   23400.000 deg
  Phase Error Of Cell =  -13764.338 deg