SLAC Magnetic Measurements
Date: 01-18-2007
Time: 14:39:51
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 01-18-2007
Time: 14:11:31
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-03
RMA Number: 1
Tuning Stage: Rough Tuning
Run Number: 76
Measurement Type: Z Scans
Operator: aww
Comment: After gap shim at end (moved out 2 mm more at 219,220)
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: c:\magdata\LCLS\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 076\bscanz_dat.001
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000318 V
Vy_0i = -0.000361 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000323 V
Vy_0f = -0.000408 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000318 V, increment = -2.962E-10 V
Vy:offset = -0.000361 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 = C:\magdata\Lcls\Undulator\L143-112000-03\RMA0001\Rough Tuning\Z Scans\Run 076\
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 = 26652.520000
Electron energy = 13.620925 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.491296
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 = 1.274651 T, RMS = 0.004050 T
Peak Field Spacing: Ave = 0.015000 m, RMS = 0.000024 m
Zero Field Spacing: Ave = 0.015000 m, RMS = 0.000035 m
Average Undulator Period = 0.030000 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -4.1902e-006 Tm
Int Int Bx dz dz =   2.5386e-005 Tm^2
Int By dz =  -2.4137e-005 Tm
Int Int By dz dz =  -7.7520e-005 Tm^2

Trajectory Exit Information:
X at exit =  -1.7064e-006 m
X slope at exit =  -5.3131e-007
Y at exit =  -5.5879e-007 m
Y slope at exit =   9.2235e-008

Calculated Undulator Parameters:
Keff = 3.491330
Beff = 1.246391 T
Lambda_rad = 1.498108e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   4.99375e-009
Undulator Period = 0.030000 m
Radiation Wavelength =   1.49811e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = 0.000000 deg, RMS = 3.937221 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) =     853.703 deg, mod_360 =     133.703 deg
Phase Change Through Undulator (Poles Between End Poles) =   39003.735 deg, mod_360 =     123.735 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     848.880 deg, mod_360 =     128.880 deg
Phase Change Of Cell =   40706.318 deg, mod_360 =      26.318 deg