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2011•Plasma and Fusion ResearchOpen access

Development of a Double-Pass Thomson Scattering System in the TST-2 Spherical Tokamak

J. Hiratsuka, A. Ejiri, Makoto Hasegawa, Yoshihiko Nagashima, Yuichi TAKASE, H. Tojo, Takashi Yamaguchi, Takanori Ambo, Hidetoshi Kakuda, Takuya Sakamoto, Ryota SHINO, Masateru SONEHARA, T. Wakatsuki, Osamu Watanabe

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Abstract

A double-pass Thomson scattering system, in which a laser pulse makes a round trip through the plasma, was constructed. Using the same optics and a fast detection unit, we can resolve backward and forward scattering pulses in the signal. Because these scatterings reflect velocity distribution along different directions, electron temperature anisotropy can be estimated from the double-pass Thomson scattering system.

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A double-pass Thomson scattering system, in which a laser pulse makes a round trip through the plasma, was constructed. Using the same optics and a fast detection unit, we can resolve backward and forward scattering pulses in the signal. Because these scatterings reflect velocity distribution along different directions, electron temperature anisotropy can be estimated from the double-pass Thomson scattering system.

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Available abstract

A double-pass Thomson scattering system, in which a laser pulse makes a round trip through the plasma, was constructed. Using the same optics and a fast detection unit, we can resolve backward and forward scattering pulses in the signal. Because these scatterings reflect velocity distribution along different directions, electron temperature anisotropy can be estimated from the double-pass Thomson scattering system.

Key concepts: Thomson scattering, Spherical tokamak, Physics, Scattering, Tokamak, Optics, Plasma, SIGNAL (programming language)

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