title: Design of the polarization multi-pass Thomson scattering system.
abstract: A novel configuration of the multi-pass Thomson scattering (TS) system is proposed to improve the time resolution and accuracy of electron temperature measurements by use of a polarization control technique. This configuration can realize a perfect coaxial multi-passing at each pass, and the number of round trips is not limited by the optical configuration. To confirm the feasibility of the new method, we installed this system in the GAMMA 10 plasma system. As a result, the integrated scattering signal of the double-pass configuration is about two times larger than that of the single-pass configuration. These results are in good agreement with the design.
authors.affiliation: National Institute for Fusion Science, Toki, Gifu, Japan. yasuhara@nifs.ac.jp
authors.forename: R
authors.initials: R
authors.lastname: Yasuhara
authors.forename: M
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: M
authors.initials: M
authors.lastname: Morimoto
authors.forename: I
authors.initials: I
authors.lastname: Yamada
authors.forename: K
authors.initials: K
authors.lastname: Kawahata
authors.forename: H
authors.initials: H
authors.lastname: Funaba
authors.forename: Y
authors.initials: Y
authors.lastname: Shima
authors.forename: J
authors.initials: J
authors.lastname: Kohagura
authors.forename: M
authors.initials: M
authors.lastname: Sakamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Nakashima
authors.forename: T
authors.initials: T
authors.lastname: Imai
authors.forename: T
authors.initials: T
authors.lastname: Minami