Pellet acceleration studies relating to the refuelling of a steady-state fusion reactor

D. Dimock, K. Jensen, Vagn Orla Jensen, L.W. Jørgensen, H.L. Pécseli, H. Sørensen, Flemming Øster

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    Abstract

    Several methods for refuelling a steady state-fusion reactor have been proposed, and the pellet method seems advantageous if the pellet can be accelerated to the necessary velocity. A study group was formed to analyze this acceleration problem. Two pellet velocity values were considered: 104 m/s and 300 m/s. A pellet velocity of 104 m/s may be suitable in the case of a reactor, whereas 300 m /s is believed to be a reasonable velocity at which to perform realistic ablation experiments in the near future. A pneumatic acceleration method was found promising. The pressure is either supplied separately or by evaporation of a part of the pellet. In the latter case, a spark behind the pellet should provide the evaporation and the necessary heating of the driving gas. A preliminary test at room temperature with pellets made of beeswax (the density being ten times that of solid hydrogen, and the plastic properties similar to those of solid hydrogen) resulted in a pellet velocity of 100 m/s at a modest value of the energy supplied to the spark.
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    PublisherRisø National Laboratory
    Number of pages22
    ISBN (Print)8755003699
    Publication statusPublished - 1975
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number332
    ISSN0106-2840

    Keywords

    • Risø-R-332
    • Risø-332
    • Risø report 332

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