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Progress in development and design of the neutral beam injector for JT-60SA

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Title: Progress in development and design of the neutral beam injector for JT-60SA
Authors: Hanada, M.1 hanada.masaysa@jaea.go.jp, Kojima, A.1, Tanaka, Y.1, Inoue, T.1, Watanabe, K.1, Taniguchi, M.1, Kashiwagi, M.1, Tobari, H.1, Umeda, N.1, Akino, N.1, Kazawa, M.1, Oasa, K.1, Komata, M.1, Usui, K.1, Mogaki, K.1, Sasaki, S.1, Kikuchi, K.1, Nemoto, S.1, Oshima, K.1, Endo, Y.1
Source: Fusion Engineering & Design. Oct2011, Vol. 86 Issue 6-8, p835-838. 4p.
Subjects: Experimental design, Neutral beams, Injectors, Magnetic fields, Magnetic shielding, Ion bombardment, Particle acceleration
Abstract: Abstract: Neutral beam (NB) injectors for JT-60 Super Advanced (JT-60SA) have been designed and developed. Twelve positive-ion-based and one negative-ion-based NB injectors are allocated to inject 30MW D0 beams in total for 100s. Each of the positive-ion-based NB injector is designed to inject 1.7MW for 100s at 85keV. A part of the power supplies and magnetic shield utilized on JT-60U are upgraded and reused on JT-60SA. To realize the negative-ion-based NB injector for JT-60SA where the injection of 500keV, 10MW D0 beams for 100s is required, R&Ds of the negative ion source have been carried out. High-energy negative ion beams of 490–500keV have been successfully produced at a beam current of 1–2.8A through 20% of the total ion extraction area, by improving voltage holding capability of the ion source. This is the first demonstration of a high-current negative ion acceleration of >1A to 500keV. The design of the power supplies and the beamline is also in progress. The procurement of the acceleration power supply starts in 2010. [Copyright &y& Elsevier]
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Database: Engineering Source
Description
Abstract:Abstract: Neutral beam (NB) injectors for JT-60 Super Advanced (JT-60SA) have been designed and developed. Twelve positive-ion-based and one negative-ion-based NB injectors are allocated to inject 30MW D0 beams in total for 100s. Each of the positive-ion-based NB injector is designed to inject 1.7MW for 100s at 85keV. A part of the power supplies and magnetic shield utilized on JT-60U are upgraded and reused on JT-60SA. To realize the negative-ion-based NB injector for JT-60SA where the injection of 500keV, 10MW D0 beams for 100s is required, R&Ds of the negative ion source have been carried out. High-energy negative ion beams of 490–500keV have been successfully produced at a beam current of 1–2.8A through 20% of the total ion extraction area, by improving voltage holding capability of the ion source. This is the first demonstration of a high-current negative ion acceleration of >1A to 500keV. The design of the power supplies and the beamline is also in progress. The procurement of the acceleration power supply starts in 2010. [Copyright &y& Elsevier]
ISSN:09203796
DOI:10.1016/j.fusengdes.2011.04.068