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Abstract

Receiving higher emphasis on the neutral beam (NB) off-axis current drive, the NB system is being highlighted for the steady state operation of the International Thermonuclear Experimental Reactor (ITER). To fulfill the physics requirement of heating and current drive, the NB system delivers approximately 50 MW of D{0} beams at 1 MeV into the ITER plasmas. The NB injector was designed so as to minimize the axial length, to avoid cost impact on the building. It was estimated by nuclear analyses that the insulation gas around the beam source would cause radiation induced conductivity, which would result in a power dissipation of >100 kW in the gas itself. As a result the present design utilizes vacuum insulation around the beam source. Since the vacuum pressure inside/outside the beam source ranges 10{-1}-10{-2} Pa, both gas (glow) and vacuum arc discharges are taken into account in the design.

Additional information

Authors: MONDINO P L, ITER Joint Central Team, Naka Joint Work Site, Ibaraki-ken (JP);BAYETTI P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);HEMSWORTH R S, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);MASSMANN P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);FUJIWARA Y, Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Naka (JP);HANADA M, Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Naka (JP);MIYAMOTO K, Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Naka (JP);OKUMURA Y, Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Naka (JP);WATANABE K, Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Naka (JP);KRYLOV A, Russian Home Team, RRC Kurchatov Institute, Moscow (RU);KULYGIN V, Russian Home Team, RRC Kurchatov Institute, Moscow (RU);PANASENKOV A, Russian Home Team, RRC Kurchatov Institute, Moscow (RU);INOUE T, ITER Joint Central Team, Naka Joint Work Site, Ibaraki-ken (JP);DI PIETRO E, ITER Joint Central Team, Naka Joint Work Site, Ibaraki-ken (JP)
Bibliographic Reference: An article published in: Review of Scientific Instruments, Volume 71, pp. 744-746 (2000)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1063/1.1150281
Record Number: 200719163 / Last updated on: 2007-05-21
Category: PUBLICATION
Original language: en
Available languages: en