Author :
Kuriyama, M. ; Akiba, M. ; Akino, N. ; Dairaku, M. ; Ebisawa, N. ; Hiruta, K. ; Kawai, M. ; Kitamura, S. ; Kikuchi, K. ; Komata, M. ; Kunieda, S. ; Matsuoka, M. ; Mizuno, M. ; Mogaki, K. ; Nomoto, H. ; Ohuchi, Y. ; Ohuchi, S. ; Ohga, T. ; Ohara, Y. ; Ooha
Abstract :
The JT-60 JAERI (Japan Atomic Energy Research Institute) Tokamak-60 neutral beam injector (NBI) has been successfully operated for three years, delivering a neutral beam power of 20 MW at a beam energy of 75 keV. The helium-beam injection into JT-60 was performed to investigate exhaustion of fusion alpha particles from the plasma. The helium-ion beam current extracted from ion sources was 40-45 A at an energy of 31 keV. The injection power was about 0.4 MW. In the helium-beam operation, the helium gas in the beamline chamber was pumped out by a condensed SF6 gas cryosorption pump. The JT-60 neutral beam injector will be modified to inject a 120-keV deuterium beam into the JT-60 upgrade, which will start to operate at the beginning of 1991
Keywords :
Tokamak devices; cryopumping; fusion reactor operation; plasma heating; 0.4 MW; 120 keV; 20 MW; 75 keV; D beam; He beam injection; JT-60; JT-60 upgrade; SF6 gas cryosorption pump; beam current; exhaustion; fusion alpha particles; injection power; neutral beam injector; Acceleration; Helium; Ion beams; Ion sources; Laser excitation; Particle beam injection; Particle beams; Plasma accelerators; Plasma simulation; Plasma sources;
