We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed ‘three-ion’ scenarios are especially suited for strong wave absorption by a very low number of resonant ions. To observe this effect, the plasma composition has to be properly adjusted, as prescribed by theory. We demonstrate the potential of the method on the world-largest plasma magnetic confinement device, JET (Joint European Torus, Culham, UK), and the high-magnetic-field tokamak Alcator C-Mod (Cambridge, USA). The obtained results demonstrate efficient acceleration of ³He ions to high energies in dedicated hydrogen–deuterium mixtures. Simultaneously, effective plasma heating is observed, as a result of the slowing-down of the fast ³He ions. The developed technique is not only limited to laboratory plasmas, but can also be applied to explain observations of energetic ions in space-plasma environments, in particular, ³He-rich solar flares.

中文翻译：

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通过射频加热在多离子等离子体中高效产生高能离子

我们描述了一种在多离子等离子体中利用电磁离子回旋波有效产生高能离子的新技术。讨论的“三离子”方案特别适合极少量共振离子的强波吸收。为了观察到这种效果，必须按照理论规定适当调整血浆成分。我们展示了该方法在世界上最大的等离子磁性约束装置JET（联合欧洲Torus，英国Culham）和高磁场托卡马克Alcator C-Mod（美国剑桥）上的潜力。获得的结果表明，在专用的氢-氘混合物中，³ He离子可有效加速至高能。同时，由于快速³的放慢，可以观察到有效的等离子体加热。他离子。这项发达的技术不仅限于实验室等离子体，还可以用于解释在空间等离子体环境中观察到的高能离子，特别是富含³ He的太阳耀斑。