SLAC Magnetic Measurements
Date: 12-15-2006
Time: 11:42:08
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 12-15-2006
Time: 11:17:45
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-03
RMA Number: 1
Tuning Stage: Rough Tuning
Run Number: 20
Measurement Type: Z Scans
Operator: aww
Comment: Move 'bigger'  y-shim (SLAC-design) from 66 to 67.
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: c:\magdata\LCLS\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 020\bscanz_dat.001
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001185 V
Vy_0i = -0.001534 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001255 V
Vy_0f = -0.001560 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = 0.001185 V, increment = 3.555E-09 V
Vy:offset = -0.001534 V, increment = -1.330E-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\Lcls\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 020\
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 = 26692.700000
Electron energy = 13.641459 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.500000
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 = 1.273390 T, RMS = 0.004010 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000024 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000036 m
Average Undulator Period = 0.029999 m

Hall Probe Overall Field Integrals:
Int Bx dz =   1.8760e-005 Tm
Int Int Bx dz dz =   2.5006e-004 Tm^2
Int By dz =  -1.0101e-005 Tm
Int Int By dz dz =  -3.3228e-005 Tm^2

Trajectory Exit Information:
X at exit =  -7.3032e-007 m
X slope at exit =  -2.2200e-007
Y at exit =  -5.4961e-006 m
Y slope at exit =  -4.1233e-007

Calculated Undulator Parameters:
Keff = 3.488621
Beff = 1.245462 T
Lambda_rad = 1.491565e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.97209e-009
Undulator Period = 0.029999 m
Radiation Wavelength =   1.49156e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 15.474705 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) =     850.206 deg, mod_360 =     130.206 deg
Phase Change Through Undulator (Poles Between End Poles) =   38823.476 deg, mod_360 =     303.476 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     844.118 deg, mod_360 =     124.118 deg
Phase Change Of Cell =   40517.800 deg, mod_360 =     197.800 deg