SLAC Magnetic Measurements
Date: 10-17-2012
Time: 10:12:39
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 10-17-2012
Time: 10:02:21
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: ECKO7-55
DATASET Number: 2
Tuning Stage: Fine Tuning
Run Number: 13
Measurement Type: Z Scans
Operator: YL
Comment: final
Session first run: 9
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\ECKO7-55\DATASET0002\Fine Tuning\Z Scans\Run 013\bscanz.dat
Temperature (C)
ECKO7-55:--> T1 20.03 --> T2 20.02 --> T5 20.03 --> T3 19.94 --> Air 20.03 --> T4 19.94 
Axes position (m) X:0.029963 Y:0.000304
Initial Hall Probe Zero Measurements:
Vx_0i = 0.000934 V
Vy_0i = -0.003093 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.000916 V
Vy_0f = -0.003124 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.000934 V, increment = -8.261E-10 V
Vy:offset = -0.003093 V, increment = -1.488E-09 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\ECKO7-55\DATASET0002\Fine Tuning\Z Scans\Run 013\
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 = -0.000006 T
Correction, By additive constant = -0.000002 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 233.317455
Electron energy = 0.119225 Gev
Nominal undulator period = 0.055000 m
Nominal K value = 2.760000
Nominal radiation wavelength = 2.429265e-006 m
Number of undulator poles = 25
Number of end poles (used in analysis) = 4
Cell length = 0.467500 m
Nominal phase change through cell = 53.407075 rad
Nominal phase of pole after end poles = 0.000000 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 = -0.000006 T
CORR_BY_ADD = -0.000002 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 25
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 0.544963 T, RMS = 0.001494 T
Peak Field Spacing: Ave = 0.027500 m, RMS = 0.000036 m
Zero Field Spacing: Ave = 0.027502 m, RMS = 0.000069 m
Average Undulator Period = 0.054993 m

Hall Probe Overall Field Integrals:
Int Bx dz =   5.9106e-006 Tm
Int Int Bx dz dz =  -9.9468e-011 Tm^2
Int By dz =  -4.8689e-006 Tm
Int Int By dz dz =   2.5214e-006 Tm^2

Trajectory Exit Information:
X at exit =   6.3403e-006 m
X slope at exit =  -1.2243e-005
Y at exit =   2.5012e-010 m
Y slope at exit =  -1.4862e-005

Calculated Undulator Parameters:
Keff = 2.762596
Beff = 0.538013 T
Lambda_rad = 2.432557e-006 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.42343e-005
Undulator Period = 0.054993 m
Radiation Wavelength =   2.43256e-006 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = 0.000000 deg, Phase error RMS = 1.936012 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   2.42927e-006 m
Cell Length = 0.467500 m
Number Of End Poles = 4
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = 89.538080 deg, RMS = 1.939548 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = 90.597944 deg, RMS = 2.283913 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = 92.871463 deg, RMS = 2.050162 deg
Cell:
  Phase Change Of Cell =    3064.385 deg
  Nominal Phase Change Of Cell =    3060.000 deg
  Phase Error Of Cell =       4.385 deg