<RESEARCH REPORT>An Optimization of Fusion Plasma Parameters
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概要
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Attentions are directed to the point of enhancement of the plasma Q value Q_p (fusion power/injection power) and the radiation parameter Ψ_r [(charged particles' fusion power - radiation power)/fusion power], and optimum plasma conditions are examined. Fusion fuels considered in this paper are for D-T, catalyzed D-D, p-^<11>B, and p-^6Li fusion plasmas. Basic equations for optimizations are the energy and particle balance equations and the charge neutrality condition in each fusion plasma. Physical parameters such as the plasma β value or the fraction of the charged particles' fusion power that is transferred to bulk plasmas are fixed so as to enhance Q_p or Ψ_r. The ratio of the fuel density to the electron density and the ratio of the particle beam injection power to the total injection power are adopted as optimization variables. Results for D-T fusion plasmas are found to agree with previous works. For catalyzed D-D fusion plasmas, results show a remarkable dependence on the plasma β value. The radiation parameter can be enhanced through the refuelling of fusion-produced tritium after transmutation into helium-3. With regard to p-^<11>B and p-^6Li fusion plasmas, the maximum attainable Q_p is found to be less than unity, and the resultant Ψ_r is negative. The same procedure of optimizations is applied to the case where niobium is present in a fusion plasma as an impurity. As a result, the acceptable niobium concentration is shown for various fusion fuels and operation conditions of fusion plasmas.
- 核融合科学研究所の論文
著者
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TOMITA Yukihiro
Research Information Center, Institute of Plasma Physics, Nagoya University
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Tomita Yukihiro
Research Information Center Institute Of Plasma Physics Nagoya University
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Nomura Yasuyuki
Research Information Center Institute Of Plasma Physics Nagoya University
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MOMOTA Hiromu
Research Information Center, Institute of Plasma Physics, Nagoya University
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Momota Hiromu
Research Information Center Institute Of Plasma Physics Nagoya University
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