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Development of Negative-Ion Based NBI System for JT-60.

1998; Taylor & Francis; Volume: 35; Issue: 11 Linguagem: Inglês

10.3327/jnst.35.739

1881-1248

M. Kuriyama, N. Akino, N. Ebisawa, L. Grisham, Hu Liquen, Atsushi Honda, Takaò Itoh, M. Kawai, M. Kazawa, K. Mogaki, Yoshihiro Ohara, T. Ohga, K. Ohmori, Y. Okumura, H. Oohara, K. Usui, K. Watanabe,

Superconducting Materials and Applications

AbstractThe negative-ion based neutral beam injector (N-NBI) for JT-60 has been developed for plasma core heating and neutral beam current drive in higher density plasmas. Construction of the N-NBI system was completed in 1996, and just after this completion, the efforts to increase beam power and beam energy started. The N-NBI system has already operated with negative ion beams with 14.3 A at 380 keV of deuterium and with 18.5A at 360 keV of hydrogen. During N-NBI experiments on JT-60, a deuterium neutral beam power of 5.2MW at 350keV has been injected for 0.7s stably, and the response of the JT-60 plasma to high energy beam injection with the N-NBI has been confirmed to be in agreement with a theoretical prediction.KEYWORDS: negative-ionion sourcesneutral beam injectionplasma heatingcurrent drivebeamlineJT-60 TOKAMAK