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

作者：Yoshikawa M^*; Yasuhara R; Morimoto M; Shima Y; Kohagura J; Sakamoto M; Nakashima Y; Imai T; Yamada I; Kawahata K; Funaba H; Minami T

来源：Review of Scientific Instruments, 2012, 83(10): 10E333.

DOI：10.1063/1.4734490

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.

• 出版日期2012-10