NDLI: Fusion tritons and plasma-facing components in a fusion reactor

Content Provider	EDP Sciences
Author	T. Kurki-Suonio V. Hynönen T. Ahlgren K. Nordlund K. Sugiyama R. Dux
Organization	ASDEX Upgrade Team
Abstract	We would like to discuss the role that 1 MeV tritons produced in deuteriumdeuterium fusion reactions might play in a long-pulse or steady-state fusion reactor. Albeit a small minority in quantity compared to the fuel tritium, the fusion tritons have significantly longer penetration length in materials and can have detrimental consequences for the integrity of the components. Because deeply deposited atoms are not easily removed from the plasma-facing components, the fusion tritium inventory in a steady-state device is expected to be limited only by decay. Furthermore, unlike fuel tritium, it is not evenly distributed on the plasma-facing components. We conclude that, of the materials considered here, tungsten appears better than carbon or beryllium in this respect. Nonetheless, 1 MeV tritons from deuterium fusion should not be neglected when making material choices for ITER and, especially, for future fusion reactors. In particular, studies on the bulk effects of deeply penetrated tritium in tungsten are urgently needed if metal-wall reactors are considered for the future. This is an interdisciplinary problem needing the attention of material scientists and plasma physicists.
Page Count	6
File Format	HTM / HTML PDF
ISSN	02955075
Alternate Webpage(s)	https://epljournal.edpsciences.org/articles/epl/abs/2007/12/epl10318/epl10318.html
e-ISSN	12864854
Issue Number	6
Journal	Europhysics Letters
Volume Number	78
DOI	10.1209/0295-5075/78/65002
Language	English
Publisher	EDP Sciences
Publisher Date	2007-06-01
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	© Europhysics Letters Association, 2007
Subject Keyword	Plasma-material interactions; boundary layer effects Tokamaks, spherical tokamaks Fusion products effects (e.g., alpha-particles, etc.), fast particle effects
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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