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The effects of relativistic broadening and frequency down-shift on electron cyclotron emission measurements in EAST.

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Title: The effects of relativistic broadening and frequency down-shift on electron cyclotron emission measurements in EAST.
Authors: Liu Yong1 liuyong@ipp.ac.cn, Han Xiang1, Ti Ang1, Wang Yu-Min1, Ling Bi-Li1, Hu Li-Qun1, Gao Xiang1
Source: Chinese Physics B. Apr2012, Vol. 21 Issue 4, p1-5. 5p.
Subjects: Relativistic mechanics, Electron cyclotron resonance sources, Plasma gases, Parameter estimation, Superconductivity, Electron temperature measurement
Abstract: This paper presents a theoretical calculation of the effects of relativistic broadening and frequency down-shift on the electron cyclotron emission measurements for a wide range of plasma parameters in the Experimental Advanced Superconducting Tokamak (EAST). The calculation is based on the radiation transfer equation, with the reabsorption and reemission processes taken into account. The broadening effect contributes to the radial resolution of the measurement, and the calculation results indicate that it is ∼ 2 cm in the case of the central electron temperature 10 keV. A pseudo radial displacement of the obtained electron temperature profile occurs if the relativistic frequency down-shift effect is not taken into account in the determination of the emission layer position. The shift could be a few centimeters as the electron temperature increases, and this effect should be taken into account. [ABSTRACT FROM AUTHOR]
Copyright of Chinese Physics B is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: The effects of relativistic broadening and frequency down-shift on electron cyclotron emission measurements in EAST.
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  Data: <searchLink fieldCode="AR" term="%22Liu+Yong%22">Liu Yong</searchLink><relatesTo>1</relatesTo><i> liuyong@ipp.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Han+Xiang%22">Han Xiang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ti+Ang%22">Ti Ang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang+Yu-Min%22">Wang Yu-Min</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ling+Bi-Li%22">Ling Bi-Li</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hu+Li-Qun%22">Hu Li-Qun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gao+Xiang%22">Gao Xiang</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Chinese+Physics+B%22">Chinese Physics B</searchLink>. Apr2012, Vol. 21 Issue 4, p1-5. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Relativistic+mechanics%22">Relativistic mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+cyclotron+resonance+sources%22">Electron cyclotron resonance sources</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+gases%22">Plasma gases</searchLink><br /><searchLink fieldCode="DE" term="%22Parameter+estimation%22">Parameter estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+temperature+measurement%22">Electron temperature measurement</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper presents a theoretical calculation of the effects of relativistic broadening and frequency down-shift on the electron cyclotron emission measurements for a wide range of plasma parameters in the Experimental Advanced Superconducting Tokamak (EAST). The calculation is based on the radiation transfer equation, with the reabsorption and reemission processes taken into account. The broadening effect contributes to the radial resolution of the measurement, and the calculation results indicate that it is ∼ 2 cm in the case of the central electron temperature 10 keV. A pseudo radial displacement of the obtained electron temperature profile occurs if the relativistic frequency down-shift effect is not taken into account in the determination of the emission layer position. The shift could be a few centimeters as the electron temperature increases, and this effect should be taken into account. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chinese Physics B is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1088/1674-1056/21/4/045201
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      – Code: eng
        Text: English
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      – SubjectFull: Relativistic mechanics
        Type: general
      – SubjectFull: Electron cyclotron resonance sources
        Type: general
      – SubjectFull: Plasma gases
        Type: general
      – SubjectFull: Parameter estimation
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      – SubjectFull: Superconductivity
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      – SubjectFull: Electron temperature measurement
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              Text: Apr2012
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