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Design study of a neutral beam injector for fusion DEMO plant at JAERI

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Title: Design study of a neutral beam injector for fusion DEMO plant at JAERI
Authors: Inoue, T. inoue@naka.jaeri.go.jp, Hanada, M.1, Kashiwagi, M.1, Nishio, S.1, Sakamoto, K.1, Sato, M.1, Taniguchi, M.1, Tobita, K.1, Watanabe, K.1
Source: Fusion Engineering & Design. Feb2006, Vol. 81 Issue 8-14, p1291-1297. 7p.
Subjects: Neutral beams, Electrostatic accelerators, Ion sources, Power semiconductors
Abstract: Abstract: Requirement and technical issues of the neutral beam (NB) system are discussed for a fusion DEMO plant. The NB system for DEMO should be characterized by high efficiency, high energy, high reliability in year-long steady operation, and low maintenance frequency. From the viewpoint of high efficiency, use of conventional electrostatic accelerator is realistic. Due to operation under radiation environment, vacuum insulation is essential in the accelerator. According to the insulation design guideline, it was clarified that a beam energy of 1.5–2MeV is possible in the accelerator. Development of filamentless, and cesium free ion source is required to achieve low maintenance frequency, based on the existing high current/high current density negative ion production technology. The gas neutralization is not applicable due to its low efficiency (60%). R&D on an advanced neutralization scheme such as plasma neutralization (efficiency: >80%) is required. Recently, development of cw high power semiconductor laser is in progress. The paper shows a conceptual design of a high efficiency laser neutralizer utilizing the new semiconductor laser array. [Copyright &y& Elsevier]
Copyright of Fusion Engineering & Design is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 19607631
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Design study of a neutral beam injector for fusion DEMO plant at JAERI
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  Data: <searchLink fieldCode="AR" term="%22Inoue%2C+T%2E%22">Inoue, T.</searchLink><i> inoue@naka.jaeri.go.jp</i><br /><searchLink fieldCode="AR" term="%22Hanada%2C+M%2E%22">Hanada, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kashiwagi%2C+M%2E%22">Kashiwagi, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nishio%2C+S%2E%22">Nishio, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sakamoto%2C+K%2E%22">Sakamoto, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sato%2C+M%2E%22">Sato, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Taniguchi%2C+M%2E%22">Taniguchi, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tobita%2C+K%2E%22">Tobita, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Watanabe%2C+K%2E%22">Watanabe, K.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Fusion+Engineering+%26+Design%22">Fusion Engineering & Design</searchLink>. Feb2006, Vol. 81 Issue 8-14, p1291-1297. 7p.
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  Data: Abstract: Requirement and technical issues of the neutral beam (NB) system are discussed for a fusion DEMO plant. The NB system for DEMO should be characterized by high efficiency, high energy, high reliability in year-long steady operation, and low maintenance frequency. From the viewpoint of high efficiency, use of conventional electrostatic accelerator is realistic. Due to operation under radiation environment, vacuum insulation is essential in the accelerator. According to the insulation design guideline, it was clarified that a beam energy of 1.5–2MeV is possible in the accelerator. Development of filamentless, and cesium free ion source is required to achieve low maintenance frequency, based on the existing high current/high current density negative ion production technology. The gas neutralization is not applicable due to its low efficiency (60%). R&D on an advanced neutralization scheme such as plasma neutralization (efficiency: >80%) is required. Recently, development of cw high power semiconductor laser is in progress. The paper shows a conceptual design of a high efficiency laser neutralizer utilizing the new semiconductor laser array. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Fusion Engineering & Design is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Ion sources
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              Text: Feb2006
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