Title :
Development of a large D- ion source for the JT-60U negative-ion-based neutral beam injector
Author :
Okumura, Y. ; Hanada, M. ; Inoue, T. ; Kuriyama, M. ; Maeno, S. ; Matsuoka, M. ; Miyamoto, K. ; Mizuno, M. ; Ohara, Y. ; Suzuki, S. ; Tanaka, M. ; Watanabe, K.
Author_Institution :
JAERI, Ibaraki, Japan
Abstract :
A large negative ion source producing 500 keV, 22 A, 10 s D- ion beams is required for the JT-60U negative ion based neutral beam injector, which is being constructed at JAERI. The ion source consists of a cesium-seeded volume negative ion source and a three-stage electrostatic accelerator. The negative ion generator, the extractor, and the first stage of the accelerator of the ion source have already been fabricated. High voltage holding test of a large insulator and the beam extraction test have just started. Design of the ion source and recent R&D results related on the design are presented
Keywords :
Tokamak devices; ion sources; negative ions; particle beam injection; 10 s; 22 A; 500 keV; Cs-seeded volume negative ion source; JAERI; JT-60U negative-ion-based neutral beam injector; beam extraction; extractor; high voltage holding; insulator; ion source; large D- ion source; negative ion generator; three-stage electrostatic accelerator; Insulation; Insulator testing; Ion accelerators; Ion beams; Ion sources; Life estimation; Magnetic separation; Particle beams; Plasma accelerators; Plasma sources;
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
DOI :
10.1109/FUSION.1993.518373
