Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror | Zendy

Masayuki Yoshikawa | Zendy; Ryo Yasuhara | Zendy; Masahiro Morimoto | Zendy; Y. Shima | Zendy; J. Kohagura | Zendy; M. Sakamoto | Zendy; Y. Nakashima | Zendy; T. Imai | Zendy; I. Yamada | Zendy; K. Kawahata | Zendy; H. Funaba | Zendy; T. Minami | Zendy

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Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror

Author(s) -

Masayuki Yoshikawa,

Ryo Yasuhara,

Masahiro Morimoto,

Y. Shima,

J. Kohagura,

M. Sakamoto,

Y. Nakashima,

T. Imai,

I. Yamada,

K. Kawahata,

H. Funaba,

T. Minami

Publication year - 2012

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 - 10.1063/1.4734490

Subject(s) - optics , thomson scattering , scattering , rayleigh scattering , polarization (electrochemistry) , laser , physics , plasma diagnostics , materials science , plasma , nuclear physics , chemistry

In the GAMMA 10 tandem mirror, the typical electron density is comparable to that of the peripheral plasma of torus-type fusion devices. Therefore, an effective method to increase Thomson scattering (TS) signals is required in order to improve signal quality. In GAMMA 10, the yttrium-aluminum-garnet (YAG)-TS system comprises a laser, incident optics, light collection optics, signal detection electronics, and a data recording system. We have been developing a multi-pass TS method for a polarization-based system based on the GAMMA 10 YAG TS. To evaluate the effectiveness of the polarization-based configuration, the multi-pass system was installed in the GAMMA 10 YAG-TS system, which is capable of double-pass scattering. We carried out a Rayleigh scattering experiment and applied this double-pass scattering system to the GAMMA 10 plasma. The integrated scattering signal was made about twice as large by the double-pass system

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