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Report No.
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Nuclear fusion reactor

Inoue, Takashi

This article is a part of text book for fusion reactor design aiming at a tokamak DEMO reactor. It has been identified that the NB system should be characterized by high efficiency, high energy, high reliability in year-long steady operation, and low maintenance frequency. Due to operation under radiation environment, vacuum insulation is essential in the accelerator. According to the vacuum insulation characteristics, it was clarified that a beam energy of 1.0-1.5 MeV is realistic. Development of filamentless, and cesium free ion source is required to achieve low maintenance frequency, based on the existing negative ion production technology. The gas neutralization is not applicable due to its low efficiency (60%). 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.

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