SLAC Magnetic Measurements
Date: 01-09-2007
Time: 10:43:36
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 01-09-2007
Time: 10:27:15
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-03
RMA Number: 1
Tuning Stage: Rough Tuning
Run Number: 47
Measurement Type: Z Scans
Operator: aww
Comment: Repeat of last
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: c:\magdata\LCLS\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 047\bscanz_dat.001
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000306 V
Vy_0i = -0.000375 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000350 V
Vy_0f = -0.000460 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000306 V, increment = -2.222E-09 V
Vy:offset = -0.000375 V, increment = -4.285E-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 = C:\magdata\Lcls\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 047\
Input file name = bscanz_dat.001
Input file type = SLAC_VXVYBXBYVSZ
Correction required = 1
Correction file = c:\Insertion Device Analysis\Earth Field Correction\earth_field_corr.dat
Correction file type = CORR_BXBYVSZ
Electron gamma = 26688.610000
Electron energy = 13.639369 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.499114
Nominal radiation wavelength = 1.500000e-010 m
Number of undulator poles = 226
Number of end poles (used in analysis) = 4
Cell length = 3.656000 m

Field Correction:
The file
c:\Insertion Device Analysis\Earth Field Correction\earth_field_corr.dat
was used to correct Bx and By.

Peak And Zero Field Summary:
Number of Poles = 226
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 1.277132 T, RMS = 0.003505 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000023 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000035 m
Average Undulator Period = 0.029999 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -1.8816e-005 Tm
Int Int Bx dz dz =   2.3327e-005 Tm^2
Int By dz =   5.5529e-004 Tm
Int Int By dz dz =   1.0595e-003 Tm^2

Trajectory Exit Information:
X at exit =   2.3291e-005 m
X slope at exit =   1.2207e-005
Y at exit =  -5.1278e-007 m
Y slope at exit =   4.1362e-007

Calculated Undulator Parameters:
Keff = 3.506896
Beff = 1.251978 T
Lambda_rad = 1.505492e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.01849e-009
Undulator Period = 0.029999 m
Radiation Wavelength =   1.50549e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 27.023680 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.50000e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     853.409 deg, mod_360 =     133.409 deg
Phase Change Through Undulator (Poles Between End Poles) =   39226.820 deg, mod_360 =     346.820 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     858.739 deg, mod_360 =     138.739 deg
Phase Change Of Cell =   40938.967 deg, mod_360 =     258.967 deg