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박현거

Park, Hyeon Keo
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Design of a collective scattering system for small scale turbulence study in Korea Superconducting Tokamak Advanced Research

Author(s)
Lee, WoochangPark, Hyeon KeoLee, D.J.Nam Y.U.Leem, J.Kim, T.K.
Issued Date
2016-04
DOI
10.1063/1.4944834
URI
https://scholarworks.unist.ac.kr/handle/201301/19616
Fulltext
http://scitation.aip.org/content/aip/journal/rsi/87/4/10.1063/1.4944834
Citation
REVIEW OF SCIENTIFIC INSTRUMENTS, v.87, no.4, pp.043501
Abstract
The design characteristics of a multi-channel collective (or coherent) scattering system for small scale turbulence study in Korea Superconducting Tokamak Advanced Research (KSTAR), which is planned to be installed in 2017, are given in this paper. A few critical issues are discussed in depth such as the Faraday and Cotton-Mouton effects on the beam polarization, radial spatial resolution, probe beam frequency, polarization, and power. A proper and feasible optics with the 300 GHz probe beam, which was designed based on these issues, provides a simultaneous measurement of electron density fluctuations at four discrete poloidal wavenumbers up to 24 cm-1. The upper limit corresponds to the normalized wavenumber kθρe of ∼0.15 in nominal KSTAR plasmas. To detect the scattered beam power and extract phase information, a quadrature detection system consisting of four-channel antenna/detector array and electronics will be employed.
Publisher
AMER INST PHYSICS
ISSN
0034-6748
Keyword
ELECTRON-CYCLOTRON EMISSIONPLASMASFLUCTUATIONSCONFINEMENTPOLARIMETRYDISCHARGESABSORPTIONDENSITY

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