SLAC Magnetic Measurements
Date: 04-17-2007
Time: 10:25:18
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 04-17-2007
Time: 10:19:18
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-13
DATASET Number: 1
Tuning Stage: Rough Tuning
Run Number: 2
Measurement Type: Z Scans
Operator: AW
Comment: y=0.000215, x=.027846   2-screw 0.05 x-shim at pole 6.
Measurement Device x: 
Measurement Device y: SENIS_24-06
Data File: s:\magdata\LCLS\Undulator\L143-112000-13\DATASET0001\Rough Tuning\Z Scans\Run 002\bscanz.dat
Temperature (C)
L143-112000-13:--> top_start 20.16 --> top_mid 20.17 --> top_end 20.10 --> bot 20.14 --> granite 20.12 --> Air 20.06 
Axes position (m) X:0.027846 Y:0.000215
Initial Hall Probe Zero Measurements:
Vx_0i = -0.000450 V
Vy_0i = -0.000352 V
Final Hall Probe Zero Measurements:
Vx_0f = -0.000500 V
Vy_0f = -0.000358 V
Offset Correction Voff = offset+index*increment
index = 0,1...19850
Vx:offset = -0.000450 V, increment = -2.518E-09 V
Vy:offset = -0.000352 V, increment = -2.955E-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\L143-112000-13\DATASET0001\Rough Tuning\Z Scans\Run 002\
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 = 26686.340000
Electron energy = 13.636695 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.498623
Nominal radiation wavelength = 1.499700e-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 = 1.277180 T, RMS = 0.003718 T
Peak Field Spacing: Ave = 0.014999 m, RMS = 0.000024 m
Zero Field Spacing: Ave = 0.014999 m, RMS = 0.000041 m
Average Undulator Period = 0.029998 m

Hall Probe Overall Field Integrals:
Int Bx dz =  -1.9181e-004 Tm
Int Int Bx dz dz =  -5.4463e-004 Tm^2
Int By dz =  -9.8141e-004 Tm
Int Int By dz dz =  -6.7862e-004 Tm^2

Trajectory Exit Information:
X at exit =  -1.4919e-005 m
X slope at exit =  -2.1576e-005
Y at exit =   1.1973e-005 m
Y slope at exit =   4.2168e-006

Calculated Undulator Parameters:
Keff = 3.512693
Beff = 1.254069 T
Lambda_rad = 1.510009e-010 m

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =   5.03363e-009
Undulator Period = 0.029998 m
Radiation Wavelength =   1.51001e-010 m
Phase Error (From Slippage vs Z Fit Residuals): Ave = -0.000000 deg, RMS = 38.122258 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =   1.49970e-010 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Phase Change Into Undulator (To Pole After End Poles) =     840.568 deg, mod_360 =     120.568 deg
Phase Change Through Undulator (Poles Between End Poles) =   39422.757 deg, mod_360 =     182.757 deg
Phase Change Out Of Undulator (To Pole Before End Poles) =     926.964 deg, mod_360 =     206.964 deg
Phase Change Of Cell =   41190.290 deg
Nominal Phase Change Of Cell =   40680.000 deg
Phase Error Of Cell =     510.290 deg