SLAC Magnetic Measurements
Date: 04-03-2007
Time: 10:29:47
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 04-03-2007
Time: 10:21:32
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-06
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 128
Measurement Type: Z Scans
Operator: AW
Comment: After gap shim; at old y, to find first pole position.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-06\DATASET0001\Rough Tuning\Z Scans\Run 128\bscanz_dat.001
Temperature (C)
L143-112000-06:--> t_start 20.31 --> t_mid 20.32 --> top_end 20.24 --> bot 20.29 --> granite 20.24 --> Air 20.22 
Axes position (m) X:0.027639 Y:0.000082
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000376 V
Vy_0i = -0.000507 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000370 V
Vy_0f = -0.000495 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000376 V, increment = 2.961E-10 V
Vy:offset = -0.000507 V, increment = 5.907E-10 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 128\
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 = 26625.060000
Electron energy = 13.605381 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.486231
Nominal radiation wavelength = 1.497453e-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 = 1.270970 T, RMS = 0.005825 T
Peak Field Spacing: Ave = 0.015002 m, RMS = 0.000033 m
Zero Field Spacing: Ave = 0.015002 m, RMS = 0.000044 m
Average Undulator Period = 0.030005 m

Hall Probe Overall Field Integrals:
Int Bx dz =   6.9399e-005 Tm
Int Int Bx dz dz =   9.8759e-005 Tm^2
Int By dz =   5.9241e-005 Tm
Int Int By dz dz =  -8.2645e-004 Tm^2

Trajectory Exit Information:
X at exit =  -1.8211e-005 m
X slope at exit =   1.3054e-006
Y at exit =  -2.1761e-006 m
Y slope at exit =  -1.5292e-006

Calculated Undulator Parameters:
Keff = 3.492622
Beff = 1.246641 T
Lambda_rad = 1.502408e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.00724e-009
Undulator Period = 0.030005 m
Radiation Wavelength =   1.50241e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 10.457885 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49745e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     861.085 deg, mod_360 =     141.085 deg
Phase Change Through Undulator (Poles Between End Poles) =   39179.801 deg, mod_360 =     299.801 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     870.844 deg, mod_360 =     150.844 deg
Phase Change Of Cell =   40911.730 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     231.730 deg