SLAC Magnetic Measurements
Date: 04-28-2015
Time: 10:03:06
 
Planar Insertion Device Analysis
--------------------------------

Data File Header:
SLAC Magnetic Measurements
Date: 04-28-2015
Time: 09:36:45
Project: LCLS
Device Type: Undulator
Data Type: 
Serial Number: L143-112000-13
DATASET Number: 49
Tuning Stage: Fine Tuning
Run Number: 34
Measurement Type: Z Scans
Operator: YL
Comment: final
Session first run: 32
Measurement Device x: 
Measurement Device y: SENTRON_441
Data File: s:\magdata\LCLS\Undulator\L143-112000-13\DATASET0049\Fine Tuning\Z Scans\Run 034\bscanz.dat
Temperature (C)
L143-112000-13:--> T1 20.07 --> T2 20.07 --> T5 20.02 --> T3 20.07 --> Air 20.06 --> T4 20.05 --> KRefM 19.90 
Axes position (m) X:0.039580 Y:0.000233
Initial Hall Probe Zero Measurements:
Vx_0i = 0.001239 V
Vy_0i = -0.003205 V
Final Hall Probe Zero Measurements:
Vx_0f = 0.001216 V
Vy_0f = -0.003207 V
Offset Correction Voff = offset+index*increment
index = 0,1...21250
Vx:offset = 0.001239 V, increment = -1.102E-09 V
Vy:offset = -0.003205 V, increment = -1.027E-10 V
Hall Probe Calibration File:
Y: c:\CVI\current_calib\Sentron_441\Sentron_441_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\DUMMY\Undulator\SN13\Run 034\
Input file name = x+00000_y+000_bscanz.dat
Input file type = ZVXYBXYH
Correction required = 1
Correction, Bx multiplicative factor = 1.000000 
Correction, By multiplicative factor = 1.000000 
Correction, Bx additive constant = -0.000022 T
Correction, By additive constant = -0.000004 T
Correction Bxy additive file = none
Correction Bxy additive file type = CORR_ZBXY
Electron gamma = 26686.000000
Electron energy = 13.636521 Gev
Nominal undulator period = 0.030000 m
Nominal K value = 3.498623
Nominal radiation wavelength = 1.499738e-10 m
Number of undulator poles = 226
Number of end poles (used in analysis) = 4
Cell length = 3.656000 m
Nominal phase change through cell = 709.999940 rad
Nominal phase of pole after end poles = 14.137167 rad
Save as final result = 0
Result file directory = c:\magdata\slac_und_2\
Result file name = zscan_xn0060yp0002.dat
Figures close on exit = 0
Figures visible = 1

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The Measured Fields Were Corrected:
Bx_corr = CORR_BX_MULT * Bx + CORR_BX_ADD + CORR_BX_ADD_FILE
By_corr = CORR_BY_MULT * By + CORR_BY_ADD + CORR_BY_ADD_FILE
Parameters:
CORR_BX_MULT = 1.000000 
CORR_BY_MULT = 1.000000 
CORR_BX_ADD = -0.000022 T
CORR_BY_ADD = -0.000004 T
CORR_BX_ADD_FILE = none
CORR_BY_ADD_FILE = none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Peak And Zero Field Summary:
Number of Poles = 226
Number of End Poles (excluded in statistics) = 4
Peak Fields: Ave = 1.276226 T, RMS = 0.006672 T
Peak Field Spacing: Ave = 0.015001 m, RMS = 0.000025 m
Zero Field Spacing: Ave = 0.015001 m, RMS = 0.000040 m
Average Undulator Period = 0.030002 m

Hall Probe Overall Field Integrals:
Int Bx dz =   -1.0312e-05 Tm
Int Int Bx dz dz =   -7.5311e-05 Tm^2
Int By dz =    3.4213e-05 Tm
Int Int By dz dz =    4.1488e-05 Tm^2

Trajectory Exit Information:
X at exit =    9.1210e-07 m
X slope at exit =    7.5217e-07
Y at exit =    1.6557e-06 m
Y slope at exit =    2.2670e-07

Calculated Undulator Parameters:
Keff = 3.498532
Beff = 1.248854 T
Lambda_rad = 1.499782e-10 m

Calculated K Value At 20 C:
(Assumes Keff changes by -.05% per degree C)
Measured Average Undulator Temperature = 20.056000 C
Measured Keff = 3.498532
Calculated Keff at 20 C = 3.498630
Relative Change (Keff_20C - Keff) / Keff = 0.000028

Phase Fluctuations:
Slippage vs Z At Peaks Fitted Slope =    4.99890e-09
Undulator Period = 0.030002 m
Radiation Wavelength =    1.49978e-10 m
Phase Error (From Slippage vs Z Fit Residuals):
  Ave = -0.000000 deg, RMS = 3.757696 deg

Phase Relative To Nominal Radiation Wave:
Nominal Radiation Wavelength =    1.49974e-10 m
Cell Length = 3.656000 m
Number Of End Poles = 4
Entrance:
  Phase Error Of First 10 Poles After The End Poles
  Ave = -0.562515 deg, RMS = 3.577459 deg
Center:
  Phase Error Of All Poles In Undulator Center:
  Ave = -0.197137 deg, RMS = 3.921979 deg
Exit:
  Phase Error To Cell Boundary Of Last 10 Poles Before The End Poles
  Ave = -2.990228 deg, RMS = 5.912661 deg
Cell:
  Phase Change Of Cell =   40676.623 deg
  Nominal Phase Change Of Cell =   40680.000 deg
  Phase Error Of Cell =      -3.377 deg

Calculated Phase Change In The Cell At 20 C:
(Relative to the nominal radiation wave)
(Assumes Keff changes by -.05% per degree C)
Measured Average Undulator Temperature = 20.056000 C
Measured Phase Change Of Cell =   40676.623 deg
Calculated Phase Change Of Cell At 20 C =   40678.581 deg
Phase Change Due To Temperature (Phase_20C - Phase) =       1.958 deg