Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA | Zendy

K. Tanaka | Zendy; S. Coda | Zendy; M. Yoshida | Zendy; H. Sasao | Zendy; Y. Kawano | Zendy; Ryota Imazawa | Zendy; H. Kubo | Zendy; Yoshihiro Kamada | Zendy

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Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA

Author(s) -

K. Tanaka,

S. Coda,

M. Yoshida,

H. Sasao,

Y. Kawano,

Ryota Imazawa,

H. Kubo,

Yoshihiro Kamada

Publication year - 2016

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.4960057

Subject(s) - microturbulence , turbulence , tokamak , shearing (physics) , physics , plasma , radius , optics , magnetic field , langmuir probe , phase (matter) , plasma diagnostics , electron temperature , computational physics , materials science , mechanics , computer security , quantum mechanics , computer science , thermodynamics

A tangential viewing phase contrast imaging system is being designed for the JT-60SA tokamak to investigate microturbulence. In order to obtain localized information on the turbulence, a spatial-filtering technique is applied, based on magnetic shearing. The tangential viewing geometry enhances the radial localization. The probing laser beam is injected tangentially and traverses the entire plasma region including both low and high field sides. The spatial resolution for an Internal Transport Barrier discharge is estimated at 30%-70% of the minor radius at k = 5 cm-1, which is the typical expected wave number of ion scale turbulence such as ion temperature gradient/trapped electron mode.

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