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Abstract

In contrast to the Multi Aperture-MUlti Grid (MAMuG) concept of the ITER neutral beam injector reference design in which D{-} acceleration to 40 A, 1 MeV is achieved through seven grids containing 1280 apertures each, the European SINgle GAP-SINGle Aperture (SINGAP) concept proposes acceleration of 1280 pre-accelerated (20-50 keV) beamlets to 1 MeV in a single step. During acceleration the beamlets are merged into 16 beam groups of 80 beamlets. These 16 beam groups (�hyperbeamlets�) then emerge from an exit grid containing only 16 very large apertures. This concept is expected to reduce cost and increase the tolerance to mechanical errors and stray magnetic fields. The physics of this concept and a design have been described before by ourselves. Improved computational facilities have enabled us to calculate larger models and this has led to necessary modifications to the design which are described in this paper.

Additional information

Authors: DE ESCH H P L, 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)
Bibliographic Reference: An article published in: Fusion Engineering and Design (2005), Volume 73, Issues 2-4, Pages 329-341
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.sciencedirect.com/science/journal/09203796
Record Number: 200719020 / Last updated on: 2007-04-02
Category: PUBLICATION
Original language: en
Available languages: en
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