SLAC Magnetic Measurements
Date: 06-08-2007
Time: 16:30:03
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 06-08-2007
Time: 16:20:00
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-12
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 24
Measurement Type: Z Scans
Operator: AW
Comment: x=0.027499 y=0.000257 (36 mum up) Begin y-traj. tuning.  
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-12\DATASET0001\Rough Tuning\Z Scans\Run 024\bscanz.dat
Temperature (C)
L143-112000-12:--> top_start 20.24 --> top_mid 20.22 --> top_end 20.15 --> bot 20.20 --> granite 20.18 --> Air 20.13 
Axes position (m) X:0.027499 Y:0.000257
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000529 V
Vy_0i = -0.000475 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000453 V
Vy_0f = -0.000475 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000529 V, increment = 3.851E-09 V
Vy:offset = -0.000475 V, increment = 0.000E+00 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\L143-112000-12\DATASET0001\Rough Tuning\Z Scans\Run 024\
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 = 0.000000 T
Correction, By additive constant = 0.000000 T
Correction Bxy additive file = S:\Magdata\Earth Field Correction\earth_field_corr.dat
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26679.990000
Electron energy = 13.633450 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.497246
Nominal radiation wavelength = 1.499399e-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
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 = 0.000000 T
CORR_BY_ADD = 0.000000 T
CORR_BX_ADD_FILE = S:\Magdata\Earth Field Correction\earth_field_corr.dat
CORR_BY_ADD_FILE = S:\Magdata\Earth Field Correction\earth_field_corr.dat
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 226
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 1.281774 T, RMS = 0.003247 T
Peak Field Spacing: Ave = 0.015000 m, RMS = 0.000024 m
Zero Field Spacing: Ave = 0.015000 m, RMS = 0.000038 m
Average Undulator Period = 0.030001 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -3.4805e-004 Tm
Int Int Bx dz dz =  -7.3676e-004 Tm^2
Int By dz =  -2.5672e-006 Tm
Int Int By dz dz =   3.0262e-005 Tm^2

Trajectory Exit Information:
X at exit =   6.6546e-007 m
X slope at exit =  -5.6452e-008
Y at exit =   1.6201e-005 m
Y slope at exit =   7.6533e-006

Calculated Undulator Parameters:
Keff = 3.517146
Beff = 1.255548 T
Lambda_rad = 1.514159e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.04702e-009
Undulator Period = 0.030001 m
Radiation Wavelength =   1.51416e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 11.539037 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49940e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     834.687 deg, mod_360 =     114.687 deg
Phase Change Through Undulator (Poles Between End Poles) =   39446.403 deg, mod_360 =     206.403 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     851.150 deg, mod_360 =     131.150 deg
Phase Change Of Cell =   41132.241 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     452.241 deg