Development of negative ion beam accelerators for high power neutral beam systems

Author

Watanabe, K. ; Ebisawa, JV ; Fujiwara, Y. ; Honda, A. ; Inoue, T. ; Kazawa, M. ; Kuriyama, M. ; Miyamoto, K. ; Miyamoto, N. ; Mogaki, K. ; Nagase, A. ; Ohara, Y. ; Okumura, Y. ; Takayasu, T. ; Usami, H. ; Usui, K.

Author_Institution

Naka Fusion Res. Establ., JAERI, Ibaraki, Japan

Volume

1

fYear

1995

fDate

30 Sep-5 Oct 1995

Firstpage

642

Abstract

A 500 keV negative ion source for JT-60U and a 1 MeV ion source for ITER are being developed at JAERI. A beam acceleration test of the JT-60U negative ion source that is designed to produce a 500 keV, 22 A D beam for 10 s, has started. The ion source consists of a cesium seeded volume negative ion generator and a three-stage multi-aperture accelerator. Up to now, a D ion beam of 410 keV, 6.1 A, 0.2 s, 2.5 MW was accelerated. This is the world record of deuterium negative ion beam current and negative ion beam power. On the other hand, to demonstrate negative ion acceleration up to an energy of 1 MeV for ITER, we constructed a five-stage electrostatic accelerator and a 1 MV/1A test facility called “MeV Test Facility (MTF)”. The accelerator was conditioned up to a high voltage of 760 kV without beam. The H ion beam was successfully accelerated up to the energy of 700 keV with a drain current of 230 mA for 1 s

Keywords

Tokamak devices; electrostatic accelerators; fusion reactor design; fusion reactors; ion accelerators; ion sources; plasma beam injection heating; 1 MeV; 1 s; 10 s; 22 A; 230 mA; 500 keV; 700 keV; 760 kV; Cs seeded volume negative ion generator; D; D ion beam; H; H ion beam; ITER; JT-60U; MeV Test Facility; beam acceleration test; five-stage electrostatic accelerator; high power neutral beam systems; negative ion beam accelerators; negative ion source; three-stage multiaperture accelerator; Acceleration; Deuterium; Electrostatics; Ion accelerators; Ion beams; Ion sources; Life estimation; Particle beams; Test facilities; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1995. SOFE '95. Seeking a New Energy Era., 16th IEEE/NPSS Symposium

Conference_Location

Champaign, IL

Print_ISBN

0-7803-2969-4

Type

conf

DOI

10.1109/FUSION.1995.534306

Filename

534306