SLAC Magnetic Measurements
Date: 06-18-2007
Time: 15:48:14
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 06-18-2007
Time: 15:33:29
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-12
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 84
Measurement Type: Z Scans
Operator: AW
Comment: x=0.027491 y=0.00026843  1.5 turn out at x-shim at 6.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-12\DATASET0001\Rough Tuning\Z Scans\Run 084\bscanz.dat
Temperature (C)
L143-112000-12:--> top_start 20.07 --> top_mid 20.04 --> top_end 19.95 --> bot 20.02 --> granite 20.00 --> Air 19.92 
Axes position (m) X:0.027491 Y:0.000268
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000365 V
Vy_0i = -0.000513 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000350 V
Vy_0f = -0.000466 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000365 V, increment = 7.406E-10 V
Vy:offset = -0.000513 V, increment = 2.364E-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\L143-112000-12\DATASET0001\Rough Tuning\Z Scans\Run 084\
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 = 26646.170000
Electron energy = 13.616168 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.489919
Nominal radiation wavelength = 1.497799e-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 = 1.272297 T, RMS = 0.006315 T
Peak Field Spacing: Ave = 0.015002 m, RMS = 0.000034 m
Zero Field Spacing: Ave = 0.015003 m, RMS = 0.000043 m
Average Undulator Period = 0.030005 m

Hall Probe Overall Field Integrals:
Int Bx dz =   2.0080e-005 Tm
Int Int Bx dz dz =   7.6521e-005 Tm^2
Int By dz =   3.9884e-005 Tm
Int Int By dz dz =   2.0931e-004 Tm^2

Trajectory Exit Information:
X at exit =   4.6084e-006 m
X slope at exit =   8.7815e-007
Y at exit =  -1.6848e-006 m
Y slope at exit =  -4.4210e-007

Calculated Undulator Parameters:
Keff = 3.489966
Beff = 1.245670 T
Lambda_rad = 1.498096e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.99278e-009
Undulator Period = 0.030005 m
Radiation Wavelength =   1.49810e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = 0.000000 deg, RMS = 4.568075 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49780e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     816.251 deg, mod_360 =      96.251 deg
Phase Change Through Undulator (Poles Between End Poles) =   39057.425 deg, mod_360 =     177.425 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     819.542 deg, mod_360 =      99.542 deg
Phase Change Of Cell =   40693.219 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =      13.219 deg