SLAC Magnetic Measurements
Date: 03-19-2007
Time: 10:27:47
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 03-19-2007
Time: 10:16:04
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-06
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 2
Measurement Type: Z Scans
Operator: AW
Comment: x=0.027630 y=0.000121; 0.2in 2-screw x-shim  at 2.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-06\DATASET0001\Rough Tuning\Z Scans\Run 002\bscanz_dat.001
Temperature (C)
L143-112000-06:--> t_start 20.26 --> t_mid 20.22 --> top_end 20.14 --> bot 20.20 --> granite 20.17 --> Air 20.13 
Axes position (m) X:0.027630 Y:0.000121
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000250 V
Vy_0i = -0.000437 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000253 V
Vy_0f = -0.000402 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000250 V, increment = -1.481E-10 V
Vy:offset = -0.000437 V, increment = 1.773E-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\L143-112000-06\DATASET0001\Rough Tuning\Z Scans\Run 002\
Input file name = bscanz_dat.001
Input file type = ZVXYBXYH
Correction required = 1
Correction file = S:\Magdata\Earth Field Correction\earth_field_corr.dat
Correction file type = CORR_ZBXY
Electron gamma = 26667.270000
Electron energy = 13.626950 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.494492
Nominal radiation wavelength = 1.498799e-010 m
Number of undulator poles = 226
Number of end poles (used in analysis) = 4
Cell length = 3.656000 m

Field Correction:
The file
S:\Magdata\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 = 1.272302 T, RMS = 0.003270 T
Peak Field Spacing: Ave = 0.015001 m, RMS = 0.000030 m
Zero Field Spacing: Ave = 0.015001 m, RMS = 0.000041 m
Average Undulator Period = 0.030003 m

Hall Probe Overall Field Integrals:
Int Bx dz =   2.2398e-004 Tm
Int Int Bx dz dz =   4.8922e-004 Tm^2
Int By dz =  -1.1809e-003 Tm
Int Int By dz dz =  -2.1773e-003 Tm^2

Trajectory Exit Information:
X at exit =  -4.7900e-005 m
X slope at exit =  -2.5979e-005
Y at exit =  -1.0763e-005 m
Y slope at exit =  -4.9275e-006

Calculated Undulator Parameters:
Keff = 3.524968
Beff = 1.258272 T
Lambda_rad = 1.521495e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.07120e-009
Undulator Period = 0.030003 m
Radiation Wavelength =   1.52149e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 43.761125 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49880e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     923.000 deg, mod_360 =     203.000 deg
Phase Change Through Undulator (Poles Between End Poles) =   39733.936 deg, mod_360 =     133.936 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     991.978 deg, mod_360 =     271.978 deg
Phase Change Of Cell =   41648.914 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     968.914 deg