Conceptual design of a fast-ignition laser fusion reactor based on a dry wall chamber

Y. Ogawa, T. Goto, Kunihiko Okano, Y. Asaoka, R. Hiwatari, Y. Someya

Research output: Contribution to journalArticle

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Abstract

The fast ignition is quite attractive for a compact laser fusion reactor, because a sufficiently high pellet gain is available with a small input energy. We designed an inertial fusion reactor based on Fast-ignition Advanced Laser fusion reactor CONcept, called FALCON-D, where a dry wall is employed for a chamber wall. A simple point model shows that the pellet gain G∼100 is available with laser energies of 350kJ for implosion, 50kJ for heating. This results in the fusion yield of 40 MJ in one shot. By increasing the repetition rate up to 30 Hz, the fusion power of 1.2 GWth becomes available. Plant system analysis shows the net electric power to be about 0.4 GWe In the fast ignition it is available to employ a low aspect ratio pellet, which is favorable for the stability during the implosion phase. Here the pellet aspect ratio is reduced to be 2 ∼ 4, and the optimization of the pulse shape for the implosion laser are carried out by using the 1-D hydrodynamic simulation code ILESTA-1D. A ferritic steel with a tungsten armour is employed for the chamber wall. The feasibility of this dry wall concept is studied from various engineering aspects such as surface melting, physical and chemical sputtering, blistering and exfoliation by helium retention, and thermo-mechanical fatigue, and it is found that blistering and exfoliation due to the helium retention and fatigue failure due to cyclic thermal load are major concerns. The cost analysis shows that the construction cost is moderate but the cost of electricity is slightly expensive.

Original languageEnglish
Article number032033
JournalJournal of Physics: Conference Series
Volume112
Issue numberPart 3
DOIs
Publication statusPublished - 2008 Jun 12
Externally publishedYes

Fingerprint

laser fusion
fusion reactors
pellets
ignition
implosions
chambers
fusion
helium
cost analysis
costs
armor
low aspect ratio
systems analysis
electric power
electricity
shot
lasers
aspect ratio
repetition
tungsten

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Conceptual design of a fast-ignition laser fusion reactor based on a dry wall chamber. / Ogawa, Y.; Goto, T.; Okano, Kunihiko; Asaoka, Y.; Hiwatari, R.; Someya, Y.

In: Journal of Physics: Conference Series, Vol. 112, No. Part 3, 032033, 12.06.2008.

Research output: Contribution to journalArticle

Ogawa, Y. ; Goto, T. ; Okano, Kunihiko ; Asaoka, Y. ; Hiwatari, R. ; Someya, Y. / Conceptual design of a fast-ignition laser fusion reactor based on a dry wall chamber. In: Journal of Physics: Conference Series. 2008 ; Vol. 112, No. Part 3.
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