SLAC Magnetic Measurements
Date: 04-09-2007
Time: 14:49:51
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 04-09-2007
Time: 14:39:14
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-11
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 6
Measurement Type: Z Scans
Operator: AW
Comment: Removed shim at 38, moed shim from 137 to 113 (so now x-traj.shimsat 74, 113) on Yurii advice
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-11\DATASET0001\Rough Tuning\Z Scans\Run 006\bscanz.dat
Temperature (C)
L143-112000-11:--> top_start 20.19 --> top_mid 20.17 --> top_end 20.09 --> bot 20.16 --> granite 20.13 --> Air 20.10 
Axes position (m) X:0.027844 Y:0.000212
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000379 V
Vy_0i = -0.000411 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000429 V
Vy_0f = -0.000367 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000379 V, increment = -2.518E-09 V
Vy:offset = -0.000411 V, increment = 2.216E-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\L143-112000-11\DATASET0001\Rough Tuning\Z Scans\Run 006\
Input file name = x+00000_y+000_bscanz.dat
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 = 1.277135 T, RMS = 0.003871 T
Peak Field Spacing: Ave = 0.015000 m, RMS = 0.000024 m
Zero Field Spacing: Ave = 0.015000 m, RMS = 0.000033 m
Average Undulator Period = 0.029999 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -7.5509e-005 Tm
Int Int Bx dz dz =  -2.2155e-004 Tm^2
Int By dz =   6.6316e-005 Tm
Int Int By dz dz =   6.3837e-004 Tm^2

Trajectory Exit Information:
X at exit =   1.4066e-005 m
X slope at exit =   1.4613e-006
Y at exit =   4.8817e-006 m
Y slope at exit =   1.6638e-006

Calculated Undulator Parameters:
Keff = 3.504652
Beff = 1.251158 T
Lambda_rad = 1.511047e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.03693e-009
Undulator Period = 0.029999 m
Radiation Wavelength =   1.51105e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 11.126876 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) =     840.919 deg, mod_360 =     120.919 deg
Phase Change Through Undulator (Poles Between End Poles) =   39381.483 deg, mod_360 =     141.483 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     840.984 deg, mod_360 =     120.984 deg
Phase Change Of Cell =   41063.386 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     383.386 deg