SLAC Magnetic Measurements
Date: 07-16-2007
Time: 16:58:16
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 07-16-2007
Time: 16:47:21
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-15
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 1
Measurement Type: Z Scans
Operator: AW
Comment: x= 0.026465 y=0.000185   after x,y-scans. Start x-traj tuning.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-15\DATASET0001\Rough Tuning\Z Scans\Run 001\bscanz.dat
Temperature (C)
L143-112000-15:--> top_start 20.07 --> top_mid 20.06 --> top_end 19.99 --> bot 20.04 --> granite 20.03 --> Air 19.99 
Axes position (m) X:0.026464 Y:0.000186
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000418 V
Vy_0i = -0.000408 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000403 V
Vy_0f = -0.000384 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000418 V, increment = 7.406E-10 V
Vy:offset = -0.000408 V, increment = 1.182E-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\L143-112000-15\DATASET0001\Rough Tuning\Z Scans\Run 001\
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 = 26654.560000
Electron energy = 13.620455 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.491738
Nominal radiation wavelength = 1.498197e-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 = 1.271936 T, RMS = 0.003761 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000021 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000038 m
Average Undulator Period = 0.029997 m

Hall Probe Overall Field Integrals:
Int Bx dz =   6.3050e-005 Tm
Int Int Bx dz dz =   1.2869e-004 Tm^2
Int By dz =   1.0852e-004 Tm
Int Int By dz dz =   9.0810e-004 Tm^2

Trajectory Exit Information:
X at exit =   1.9988e-005 m
X slope at exit =   2.3887e-006
Y at exit =  -2.8325e-006 m
Y slope at exit =  -1.3878e-006

Calculated Undulator Parameters:
Keff = 3.515764
Beff = 1.255219 T
Lambda_rad = 1.515824e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.05323e-009
Undulator Period = 0.029997 m
Radiation Wavelength =   1.51582e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 60.098083 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49820e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     847.161 deg, mod_360 =     127.161 deg
Phase Change Through Undulator (Poles Between End Poles) =   39362.969 deg, mod_360 =     122.969 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     849.044 deg, mod_360 =     129.044 deg
Phase Change Of Cell =   41059.174 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     379.174 deg