title: Development of the negative ion beams relevant to ITER and JT-60SA at Japan Atomic Energy Agency.
abstract: In order to realize negative ion sources and accelerators to be applicable to International Thermonuclear Experimental Reactor and JT-60 Super Advanced, a large cesium (Cs)-seeded negative ion source and a multi-aperture and multi-stage electric acceleration have been developed at Japan Atomic Energy Agency (JAEA). Long pulse production and acceleration of the negative ion beams have been independently carried out. The long pulse production of the high current beams has achieved 100 s at the beam current of 15 A by modifying the JT-60 negative ion source. The pulse duration time is increased three times longer than that before the modification. As for the acceleration, a pulse duration time has been also extended two orders of magnitudes from 0.4 s to 60 s. The developments of the negative ion source and acceleration at JAEA are well in progress towards the realization of the negative ion sources and accelerators for fusion applications.
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hanada
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kojima
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tobari
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Nishikiori
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Hiratsuka
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kashiwagi
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Umeda
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ichikawa
authors.affiliation: Japan Atomic Energy Agency, 801-1 Mukouyama, Naka-shi, Ibaraki-ken 319-0913, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: Saitama University, Saitama, Saitama-ken 338-8570, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamano
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
authors.forename: L R
authors.initials: LR
authors.lastname: Grisham