SLAC Magnetic Measurements
Date: 01-09-2007
Time: 17:28:20
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 01-09-2007
Time: 17:21:33
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-03
RMA Number: 1
Tuning Stage: Rough Tuning
Run Number: 57
Measurement Type: Z Scans
Operator: aww
Comment: Reinstalled y-shim at 135, new y-shim at 8, 1 turn on x-shim at 221
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: c:\magdata\LCLS\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 057\bscanz_dat.001
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000403 V
Vy_0i = -0.000466 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000418 V
Vy_0f = -0.000370 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000403 V, increment = -7.406E-10 V
Vy:offset = -0.000466 V, increment = 4.876E-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 057\
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 = 1.277072 T, RMS = 0.003704 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000023 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 =   9.7438e-007 Tm
Int Int Bx dz dz =   3.8914e-005 Tm^2
Int By dz =   1.0600e-004 Tm
Int Int By dz dz =   5.5071e-005 Tm^2

Trajectory Exit Information:
X at exit =   1.2106e-006 m
X slope at exit =   2.3301e-006
Y at exit =  -8.5543e-007 m
Y slope at exit =  -2.1419e-008

Calculated Undulator Parameters:
Keff = 3.497854
Beff = 1.248750 T
Lambda_rad = 1.498824e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.99626e-009
Undulator Period = 0.029999 m
Radiation Wavelength =   1.49882e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 6.380352 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) =     853.221 deg, mod_360 =     133.221 deg
Phase Change Through Undulator (Poles Between End Poles) =   39022.611 deg, mod_360 =     142.611 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     842.549 deg, mod_360 =     122.549 deg
Phase Change Of Cell =   40718.381 deg, mod_360 =      38.381 deg