SLAC Magnetic Measurements
Date: 09-21-2009
Time: 17:52:56
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 09-08-2009
Time: 16:21:54
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-27
DATASET Number: 1
Tuning Stage: Fine Tuning
Run Number: 4
Measurement Type: Z Scans
Operator: YL
Comment: final
Session first run: 4
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-27\DATASET0001\Fine Tuning\Z Scans\Run 004\bscanz.dat
Temperature (C)
L143-112000-27:--> T5 19.03 --> T2 19.06 --> T1 19.09 --> T3 19.05 --> Air 19.13 --> T4 19.04 
Axes position (m) X:0.024970 Y:0.000346
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001439 V
Vy_0i = -0.001670 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001394 V
Vy_0f = -0.001624 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001439 V, increment = -2.116E-09 V
Vy:offset = -0.001670 V, increment = 2.184E-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 = C:\Magdata\SN27 Temperature Test\dKdx_19p0C_2\
Input file name = x-01000_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 = -0.000024 T
Correction, By additive constant = 0.000001 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26635.500000
Electron energy = 13.610716 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.487608
Nominal radiation wavelength = 1.497295e-010 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 = -0.000024 T
CORR_BY_ADD = 0.000001 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 = 1.270874 T, RMS = 0.006003 T
Peak Field Spacing: Ave = 0.015000 m, RMS = 0.000022 m
Zero Field Spacing: Ave = 0.015000 m, RMS = 0.000043 m
Average Undulator Period = 0.030000 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -1.6515e-005 Tm
Int Int Bx dz dz =   2.8613e-005 Tm^2
Int By dz =   3.4481e-005 Tm
Int Int By dz dz =   8.6453e-005 Tm^2

Trajectory Exit Information:
X at exit =   1.9042e-006 m
X slope at exit =   7.5948e-007
Y at exit =  -6.3024e-007 m
Y slope at exit =   3.6377e-007

Calculated Undulator Parameters:
Keff = 3.484945
Beff = 1.244088 T
Lambda_rad = 1.495341e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.98444e-009
Undulator Period = 0.030000 m
Radiation Wavelength =   1.49534e-010 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = -0.000000 deg, RMS = 3.400478 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49729e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = -2.044276 deg, RMS = 3.046921 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = -29.219573 deg, RMS = 15.652680 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = -2.898279 deg, RMS = 5.335951 deg
Cell:
  Phase Change Of Cell =   40622.761 deg
  Nominal Phase Change Of Cell =   40680.000 deg
  Phase Error Of Cell =     -57.239 deg