Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization
Abstract
Here, a comprehensive understanding of the impact of Cotton-Mouton Effect on Faraday polarimetry measurements using counter-rotating circular polarization probe beams has been developed. By using Jones theory, analytic study shows the Cotton-Mouton Effect cancels to first order with coupling into the Faraday measurement only at higher order. Jones-based numerical study shows the coupling effect strongly depends on the Cotton-Mouton Effect, Faraday Effect and wavelength chosen for the measurement. For realistic DIII-D plasma conditions and far-infrared wavelength, numerical calculation suggests the measurement is dominated by Faraday Effect while coupling effect leads to small but finite correction. By statistical comparison between experimental measurement and Jones-based numerical calculation under various plasma parameters, the impact of Cotton-Mouton Effect has been verified. Proper treatment of the coupling effect is essential in data analysis under certain conditions for polarimetric measurement using circular polarization in present devices and beyond.
- Publication Date:
- Research Org.:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE; National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1459769
- Grant/Contract Number:
- FC02-04ER54698; FG03-01ER54615; 11605067
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 60; Journal Issue: 8; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Chen, J., Ding, W. X., and Brower, D. L. Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization. United States: N. p., 2018.
Web. doi:10.1088/1361-6587/aac708.
Chen, J., Ding, W. X., & Brower, D. L. Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization. United States. https://doi.org/10.1088/1361-6587/aac708
Chen, J., Ding, W. X., and Brower, D. L. Mon .
"Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization". United States. https://doi.org/10.1088/1361-6587/aac708. https://www.osti.gov/servlets/purl/1459769.
@article{osti_1459769,
title = {Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization},
author = {Chen, J. and Ding, W. X. and Brower, D. L.},
abstractNote = {Here, a comprehensive understanding of the impact of Cotton-Mouton Effect on Faraday polarimetry measurements using counter-rotating circular polarization probe beams has been developed. By using Jones theory, analytic study shows the Cotton-Mouton Effect cancels to first order with coupling into the Faraday measurement only at higher order. Jones-based numerical study shows the coupling effect strongly depends on the Cotton-Mouton Effect, Faraday Effect and wavelength chosen for the measurement. For realistic DIII-D plasma conditions and far-infrared wavelength, numerical calculation suggests the measurement is dominated by Faraday Effect while coupling effect leads to small but finite correction. By statistical comparison between experimental measurement and Jones-based numerical calculation under various plasma parameters, the impact of Cotton-Mouton Effect has been verified. Proper treatment of the coupling effect is essential in data analysis under certain conditions for polarimetric measurement using circular polarization in present devices and beyond.},
doi = {10.1088/1361-6587/aac708},
journal = {Plasma Physics and Controlled Fusion},
number = 8,
volume = 60,
place = {United States},
year = {Mon Jun 11 00:00:00 EDT 2018},
month = {Mon Jun 11 00:00:00 EDT 2018}
}
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Cited by: 11 works
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Figures / Tables:
Figure 1: Numerical solution of normalized coupling effect versus CME with two different FRE values. Analytic zero-$β$ approximation is shown in dash-line for comparison.
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Works referencing / citing this record:
A Faraday-effect polarimeter for fast magnetic dynamics measurement on DIII-D
journal, October 2018
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- Review of Scientific Instruments, Vol. 89, Issue 10
Non-inductive vertical position measurements by Faraday-effect polarimetry on EAST tokamak
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.