Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note:...
-
Upload
valentine-kelly -
Category
Documents
-
view
213 -
download
0
Transcript of Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note:...
![Page 1: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/1.jpg)
Slide 1
2003 MSE Calibration: Preliminary Analysis
H. Yuh, S. D. Scott, R. Grantez
27 May 2003
Note: This presentation is best viewed with PowerPoint 2002 or later
File: 27may2003 MSE calibration.ppt
![Page 2: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/2.jpg)
Slide 2
Shot Summary 21-May-2003: A Good Day
• 35 shots total
– 3 - Lost due to DNB gate-valve permissive (90 minutes)– 1 - No-power test– 1 - No-field fault– 2 - Short DNB, too short to use
• 28 usable MSE shots
– 3 shots with about 25 ms DNB duration – usable– 5 shots with ~5 ms faults (45 ms good DNB) – good– 20 shots with full-length, 50-ms DNB
![Page 3: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/3.jpg)
Slide 3
Calibration Data Obtained
• EF3 and EF4 scan at both TF=2.7 and TF=5.4
• One shot at TF = 4.5 Tesla
• One shot each with EF1 and EF2
• Several shots at same conditions to determine shot-to-shot reproducibility.
![Page 4: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/4.jpg)
Slide 4
Two Analysis Methods Agree Well
Channels 0-8:Average Difference = -0.003 degreesScatter = 0.05 degrees
Channel 9 (innermost):Average Difference = 0.06 degreesScatter = 0.14 degrees
![Page 5: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/5.jpg)
Slide 5
Statistical Uncertainty is ~0.06 Degrees
• Inferred from standard deviation in mean angle (10 x 5-ms intervals)• Scatter is larger for innermost channel• In frame of polarimeter. • Shot-shot scatter is somewhat larger – being investigated.
![Page 6: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/6.jpg)
Slide 6
MSE Measured Angles at BT=5.4 Tesla
![Page 7: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/7.jpg)
Slide 7
MSE Measured Angles at BT=5.4 Tesla
![Page 8: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/8.jpg)
Slide 8
Overall Trends Look Very Consistent – No Special Behavior at EF=0
![Page 9: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/9.jpg)
Slide 9
Shots with Matched Ratio of TF/EF
![Page 10: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/10.jpg)
Slide 10
Calibration Against Expected Angles
• Compute field-line pitch-angle with mflux for all shots.
• Data looks quite good – consitent trends -- except for outer three channels with EF3=EF4=0.
• Faraday rotation effect appears to be small.
• Analysis in progress.
![Page 11: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/11.jpg)
Slide 11
MSE Measured Angles at BT=2.7 Tesla
![Page 12: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/12.jpg)
Slide 12
We expect small variation in measured angles at the outer channels due to viewing geometry
Actual field-line angle (degrees)
Mse
mea
sure
d a
ngl
e (d
egre
es)
![Page 13: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/13.jpg)
Slide 13
The expected nonlinearity is small
![Page 14: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/14.jpg)
Slide 14
A Puzzle: Profiles of Measured Angles for EF=0
‘Uptick’ at edge not understood
Rmajor (cm)
![Page 15: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/15.jpg)
Slide 15
Angle in Edge Channels
Measured Angle in Channel 4
Mea
sure
d A
ngle
in O
ther
Cha
nne
ls
Edge channel
Core channels
![Page 16: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/16.jpg)
Slide 16
Shot-Shot Scatter Sometimes Consistent with Measured Variation within a Single Shot
![Page 17: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/17.jpg)
Slide 17
Shot-Shot Scatter Sometimes Consistent with Measured Variation within a Single Shot
![Page 18: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/18.jpg)
Slide 18
Shot-Shot Scatter Sometimes Not Consistent with Measured Variation within a Single Shot
Note: these shots have TF = 5.4 Tesla and EF3 = EF4 = 0, which seem to be problematic in other ways.
![Page 19: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/19.jpg)
Slide 19
MFLUX Pitch-Angles during EF scan at 5.4 Tesla
![Page 20: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/20.jpg)
Slide 20
MFLUX Mapped Pitch-Angles during EF scan at 5.4 Tesla
![Page 21: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/21.jpg)
Slide 21
Measured MSE Angles during EF scan at 5.4 Tesla
Strong rise in measuredangle at outer edge
Strong rise in measuredangle at innermost point.
![Page 22: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/22.jpg)
Slide 22
MFLUX Pitch-Angles during EF scans at 2.7 Tesla
![Page 23: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/23.jpg)
Slide 23
MFLUX Mapped Pitch-Angles during EF scan at 2.7 Tesla
![Page 24: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/24.jpg)
Slide 24
Measured MSE Angles during EF scans at 2.7 Tesla
Reasonably well-behaved on innermost points.
Behavior at edgesimilar to thatat 5.4 Tesla
![Page 25: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/25.jpg)
Slide 25
Measured MSE Polarization Fraction
Polarization fraction =
F
Imax - Imin
F (Imax + Imin)
Typical range of measured angles
![Page 26: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/26.jpg)
Slide 26
Polarization Fraction during 5.4 Tesla EF Scan
+/- 0.05
• Systematic +/- 0.05 shot-to-shot variation.
• Polarization fraction is much smaller on innermost channel.
![Page 27: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/27.jpg)
Slide 27
Polarization Fraction during 2.7 Tesla EF Scan
• Values at outer edge reduced from (0.6-0.7) in 5.4 Tesla scan to (0.5-0.6) in 2.7 Tesla scan.• Innermost channel not different from others.
+/- 0.05
![Page 28: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/28.jpg)
Slide 28
Polarization During EF4 Scan at 5.4 Tesla
• Polarization fraction generally increases with increasing EF4.
• Suggests possible tuning problems but effect on measured angle should (??) be small.
![Page 29: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/29.jpg)
Slide 29
Polarization During EF3 Scan at 5.4 Tesla
Some trend toward increasing polarization fraction with increasing EF4
![Page 30: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/30.jpg)
Slide 30
Polarization During EF3+4 Scan at 5.4 Tesla
Scaling with EF is not so clear in this dataset.
![Page 31: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/31.jpg)
Slide 31
Polarization During EF4 Scan at 2.7 Tesla
Scaling with EF is not so clear in this dataset.
![Page 32: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/32.jpg)
Slide 32
Polarization During EF3 Scan at 2.7 Tesla
No clear scaling with EF in this dataset.
![Page 33: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/33.jpg)
Slide 33
Phase Offset between 40 kHz PEM drive and Signal
• Varies about mean value by +/- 0.05 radians.
• No apparent trend with EF or TF
Offs
et b
etw
een
PE
M d
rive
and
MS
E S
igna
l (ra
dian
s)
![Page 34: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/34.jpg)
Slide 34
Phase Offset between 44 kHz PEM drive and Signal
• Varies about mean value by +/- 0.10 radians.
• No apparent trend with EF or TF
Offs
et b
etw
een
PE
M d
rive
and
MS
E S
igna
l (ra
dian
s)
![Page 35: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/35.jpg)
Slide 35
Effect of Phase Shift on Measured MSE Angle
Phase Offset Amplitude Ratio Angle (radians) (degrees)
- 0.125 0.9919 0.120 - 0.100 0.9948 0.075 - 0.075 0.9970 0.043 - 0.050 0.9986 0.020 - 0.025 0.9996 0.006 0.000 1.0000 0.000 0.025 0.9997 0.004 0.050 0.9989 0.016 0.075 0.9974 0.037 0.100 0.9952 0.069 0.125 0.9925 0.108
Angle = 0.5 * atan(Amplitude Ratio)
Conclusion: the observed variability in phase shift might account for0.02 – 0.08 degrees shot-to-shot variability.
![Page 36: Slide 1 2003 MSE Calibration: Preliminary Analysis H. Yuh, S. D. Scott, R. Grantez 27 May 2003 Note: This presentation is best viewed with PowerPoint 2002.](https://reader034.fdocuments.in/reader034/viewer/2022051621/56649ea05503460f94ba38f9/html5/thumbnails/36.jpg)
Slide 36
Conclusions
• Tuning is definitely off for innermost channel at 5.4 Tesla.
• Polarization fraction measurements might suggest tuning problems generally, but hard to see how this could appreciably affect our measurements.
• Variability in phase shift between PEM and MSE signals is reasonably small … not enough to account for unusual behavior of edge channels during calibration.