Design and performance of the Thomson scattering diagnostic on LHD | Zendy

K. Narihara | Zendy; I. Yamada | Zendy; H. Hayashi | Zendy; K. Yamauchi | Zendy

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Design and performance of the Thomson scattering diagnostic on LHD

Author(s) -

K. Narihara,

I. Yamada,

H. Hayashi,

K. Yamauchi

Publication year - 2001

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 - 10.1063/1.1319368

Subject(s) - thomson scattering , optics , large helical device , scattering , plasma , laser , plasma diagnostics , materials science , radius , physics , computer science , nuclear physics , computer security

This article describes the design and performance of a multi-point (200) high repetition rate (4×50 Hz) Thomson scattering diagnostic installed on the Large Helical Device. A unique feature of this system is its oblique back scattering configuration, which enables us to observe the entire plasma region along a major radius on the midplane under a severely restricted port constraint. High throughput collection optics using a mosaic mirror of 1.5 m×1.8 m area yield high quality data even with 0.5 J pulse energy delivered from 50 Hz repetition rate Nd: yttrium?aluminum?garnet lasers. High repetition and high spatial resolution (2?4 cm) of the system enable us to study island evolution in the plasma

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