Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization

doi:10.1088/1361-6587/aac708

This content will become publicly available on June 11, 2019

Title: Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization

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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.

Authors:

; Ding, W. X. ^[1] ; Brower, D. L. ^[1]

Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy

Publication Date:: 2018-06-11

Grant/Contract Number:: FC02-04ER54698; FG03-01ER54615; 11605067

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

Research Org:: Univ. of California, Los Angeles, CA (United States)

Sponsoring Org:: USDOE; National Natural Science Foundation of China (NNSFC)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1459769


                    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.,  
        Web.  doi:10.1088/1361-6587/aac708.

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                    Chen, J., Ding, W. X., & Brower, D. L.. Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization.  United States.  doi:10.1088/1361-6587/aac708.

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                    Chen, J., Ding, W. X., and Brower, D. L.. 2018.  
        "Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization".  United States.  
        doi:10.1088/1361-6587/aac708.

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@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         = {2018},

  month        = {6}

}

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Free Publicly Accessible Full Text
This content will become publicly available on June 11, 2019
Publisher's Version of Record
10.1088/1361-6587/aac708
https://doi.org/10.1088/1361-6587/aac708

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Title: Impact of the Cotton–Mouton effect on Faraday polarimetry measurements using circular polarization

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