NDLI: Direct indirect hybrid implosion of fuel pellet in heavy ion inertial fusion

Content Provider	IEEE Xplore Digital Library
Author	Lizuka, Y. Kawata, S. Kikuchi, T. Ogoyski, A.I. Limpouch, J. Klimo, O.
Copyright Year	2008
Description	Author affiliation: Grad. Sch. of Eng., Utsunomiya Univ., Utsunomiya (Lizuka, Y.; Kawata, S.; Kikuchi, T.)
Abstract	A direct-indirect hybrid implosion mode is proposed and discussed in heavy ion beam (HIB) inertial confinement fusion (HIF) in order to release sufficient fusion energy in a robust manner. The HIB illumination non-uniformity depends strongly on a target displacement dz from the centre of a fusion reactor chamber. In a direct-driven implosion mode, dz of about 20 micron m was tolerable, and in an indirect- implosion mode, dz of about 100 micron m was allowable. In the direct-indirect mixture mode target, a low-density foam layer is inserted, and the radiation energy is confined in the foam layer. In the foam layer the radiation transport is expected to smooth the HIB illumination non-uniformity in the lateral direction. Two-dimensional implosion simulations are performed, and show that the HIB illumination non- uniformity is well smoothed in the direct-indirect hybrid-mode target. Our simulation results present that a large pellet displacement of about a few hundred micron m is allowed in order to obtain a sufficient fusion energy output in HIF. In fuel target implosion, ICF has two ways of implosion schemes, which are indirect-driven scheme and direct-driven implosion scheme. Each implosion scheme has merits and demerits. The indirect-driven scheme may be robust against the beam non- uniformity and a beam number employed is low compared with that in the direct-driven scheme, though each HIB should carry a larger current and a target structure may be complicated and expensive relatively. The direct-driven pellet structure may be simple, though the scheme may be sensitive to the HIB illumination non-uniformity. In this paper, a direct- indirect mixture implosion mode is proposed and discussed in HIB ICF.
Starting Page	1
Ending Page	1
File Size	78432
Page Count	1
File Format	PDF
ISBN	9781424419296
ISSN	07309244
DOI	10.1109/PLASMA.2008.4590618
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lighting Robustness Fuels Ion beams Simulation Education Optical sensors
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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