Title :
Recent activities on negative ion beams at JAERI
Author :
Ohara, Y. ; Akiba, M. ; Araki, M. ; Hanada, M. ; Inoue, T. ; Kojima, H. ; Kuriyama, M. ; Matsuoka, M. ; Mizuno, M. ; Matsuda, Y. ; Okumura, Y. ; Seki, M. ; Tanaka, S. ; Watanabe, K.
Author_Institution :
JAERI, Ibaraki, Japan
Abstract :
Recent results from the negative-ion source experiments and design works of negative-ion-based NBI (neutral beam injection) systems for the JAERI (Japan Energy Research Institute) tokamak (JT-60U) and the FER (Fusion Experimental Reactor) are presented together with a description of the long-range R&D program. A 50-keV, 7.8-A negative-hydrogen-ion beam has been produced successfully for a duration of 100 ms using a cesium-supplied volume source which has 253 extraction apertures of 11.3 mm in diameter. The maximum ion-beam current density is 30 mA/cm2 at the source pressure of 1.3 Pa. On the basis of recent promising results from the negative-ion sources, injection of a 500-keV, 10-MW deuterium beam into the JT-60U plasmas in 1994 to heat the core plasma and to drive the plasma current is proposed
Keywords :
fusion reactor theory and design; ion beams; ion sources; plasma heating; 1.3 Pa; 10 MW; 100 ms; 50 keV; 500 keV; D- beam; FER; Fusion Experimental Reactor; H- beam; JAERI; JT-60U; design works; deuterium beam; ion-beam current density; negative-ion source experiments; negative-ion-based NBI; neutral beam injection; Apertures; Current density; Deuterium; Fusion reactor design; Inductors; Ion beams; Particle beams; Plasma density; Plasma sources; Tokamaks;
Conference_Titel :
Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on
Conference_Location :
Knoxville, TN
DOI :
10.1109/FUSION.1989.102224
