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Note: Multi-pass Thomson scattering measurement on the TST-2 spherical tokamak.
Togashi, H; Ejiri, A; Hiratsuka, J; Nakamura, K; Takase, Y; Yamaguchi, T; Furui, H; Imamura, K; Inada, T; Kakuda, H; Nakanishi, A; Oosako, T; Shinya, T; Sonehara, M; Tsuda, S; Tsujii, N; Wakatsuki, T; Hasegawa, M; Nagashima, Y; Narihara, K; Yamada, I; Tojo, H.
Afiliación
  • Togashi H; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Ejiri A; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Hiratsuka J; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Nakamura K; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Takase Y; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Yamaguchi T; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Furui H; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Imamura K; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Inada T; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Kakuda H; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Nakanishi A; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Oosako T; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Shinya T; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Sonehara M; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Tsuda S; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Tsujii N; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Wakatsuki T; The University of Tokyo, Kashiwa 277-8561, Japan.
  • Hasegawa M; Kyushu University, Kasuga 816-8580, Japan.
  • Nagashima Y; Kyushu University, Kasuga 816-8580, Japan.
  • Narihara K; National Institute for Fusion Science, Toki 509-5292, Japan.
  • Yamada I; National Institute for Fusion Science, Toki 509-5292, Japan.
  • Tojo H; Japan Atomic Energy Agency, Naka 311-0193, Japan.
Rev Sci Instrum ; 85(5): 056103, 2014 May.
Article en En | MEDLINE | ID: mdl-24880428
ABSTRACT
In multi-pass Thomson scattering (TS) scheme, a laser pulse makes multiple round trips through the plasma, and the effective laser energy is enhanced, and we can increase the signal-to-noise ratio as a result. We have developed a coaxial optical cavity in which a laser pulse is confined, and we performed TS measurements using the coaxial cavity in tokamak plasmas for the first time. In the optical cavity, the laser energy attenuation was approximately 30% in each round trip, and we achieved a photon number gain of about 3 compared with that obtained in the first round trip. In addition, the temperature measurement accuracy was improved by accumulating the first three round trip waveforms.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2014 Tipo del documento: Article País de afiliación: Japón
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2014 Tipo del documento: Article País de afiliación: Japón