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Stability of the steady-state course of a thermonuclear reaction in an inhomogeneous plasma

Ya.I. Kolesnichenko, S.N. Reznik, V.A. Yavorskij1976年被引用 18Nuclear FusionIF 3出版社

A method has been developed for investigating the stability of a steady-state thermonuclear reaction in an inhomogeneous plasma. It has been shown that "thermonuclear burning" is unstable with respect to the excitation of axisymmetric temperature fluctuations (m = 0) homogeneous along the magnetic field (kz = 0) if the temperature Tm at the axis of the plasma column is lower than some value T*. This value is determined by the condition a (Tm = T*) = amin, where amin is the smallest plasma column radius at which the energy losses of the plasma can be compensated by the energy released as a result of thermonuclear reactions. The stability of the plasma energy balance in relation to temperature fluctuations with m≠0 and kz≠0 is discussed.It has been assumed that the temperature at the plasma surface is lower than the ignition temperature of the thermonuclear reaction. It has also been assumed that the plasma energy confinement time is short in comparison with the particle confinement time.

日本語訳

定常熱核反応の不均一プラズマにおける安定性を調べる方法が開発された。磁場に沿って一様な(kz = 0)軸対称温度ゆらぎ(m = 0)の励起に対して、プラズマ柱の軸における温度Tmが特定の値T*より低い場合、「熱核燃焼」が不安定であることが示された。この値は、プラズマのエネルギー損失が熱核反応によって放出されるエネルギーによって補償され得る最小のプラズマ柱半径をaminとするとき、条件a(Tm = T*)= aminによって決定される。m≠0およびkz≠0の温度ゆらぎに対するプラズマのエネルギー平衡の安定性についても議論されている。プラズマ表面の温度は熱核反応の着火温度より低いと仮定されている。また、粒子閉じ込め時間と比較してエネルギー閉じ込め時間が短いことも仮定されている。

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