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Plasma Diagnostics in JFT-2M

S. Kasai, K. Kamiya, K. Shinohara, H. Kawashima, H. Ogawa, K. Uehara, Y. Miura, F. Okano, S. Suzuki, K. Hoshino, K. Tsuzuki, M. Sato, K. Oasa, Y. Kusama, T. Yamauchi, Y. Nagashima, K. Ida, S. Hidekuma, T. Ido, Y. Hamada, A. Nishizawa, Y. Kawasumi, Y. Uesugi, S. Okajima, K. Kawahata, A. Ejiri, H. Amemiya, Y. Sadamoto

Fusion Science and Technology / Volume 49 / Number 2 / February 2006 / Pages 225-240

Technical Paper / JFT-2M Tokamak /

The diagnostic system of JFT-2M has consisted of about 30 individual diagnostic instruments, which were used to study plasma production, control, equilibrium, stability, confinement, plasma heating by neutral beam injection and/or by radio-frequency (rf) (lower hybrid, ion cyclotron resonance frequency, electron cyclotron heating), and current drive by rf. In these instruments, the motional Stark effect polarimeter, charge-exchange recombination spectroscopy, heavy ion beam probe, time-of-flight neutral particle analyzer, etc., have helped in further understanding the improved mechanism of confinement such as H-mode and high-recycling-steady H-mode, and operational regimes of these modes. An infrared television camera system and a lost ion probe have played a very important role in investigating the heat load on the walls due to ripple lost particles and escaping ions from the core plasma region, respectively.

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