Generation and characteristics of detached recombining plasma and its dynamic behaviour—a bridge between fusion plasmas and low-temperature ionized gases
Generation and characteristics of detached recombining plasma and its dynamic behaviour—a bridge between fusion plasmas and low-temperature ionized gases
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分离复合等离子体的产生、特征及其动态行为——聚变等离子体与低温电离气体之间的桥梁
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Y. Uesugi
中科院分区：
文献类型：
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作者：
S. Takamura;N. Ohno;D. Nishijima;Y. Uesugi
首先，介绍了磁偏滤器在聚变装置中的作用，指出了国际热核聚变实验堆燃烧过程中的能量平衡，指出了降低偏滤器靶板等离子体热负荷的必要性。其次，通过鞘层到材料表面的等离子体热流通常以能量传输因子的形式给出，其中基于表面复合的能量沉积在高密度等离子体中是必不可少的。热负荷与等离子体的任何冷却无关。然后，各种有趣的分离重组等离子体的特性，这是重要的，在减少等离子体热流，进行了讨论：等离子体分离的产生和结构，源自原子的一系列高激发里德堡态的光发射，分子激活复合（MAR）的贡献，常规电子-离子复合（EIR）和MAR之间的跃迁，尘埃凝结过程的关系和托卡马克聚变装置中等离子体分离的实验验证。最后，在线性偏滤器等离子体模拟器NAGDIS-II中获得的脱离EIR等离子体的动态行为对ELM样的热脉冲。
First, the role of a magnetic divertor in fusion devices is introduced, and it is shown that the energy balance in burning International Thermonuclear Experimental Reactor indicates a strong necessity for reduction of plasma heat load on the divertor target plate. Next, the plasma heat flow to a material surface through sheaths is generally given in terms of the energy transmission factor, in which the energy deposition based on the surface recombination is essential in high-density plasmas. The heat load is independent of any cooling of the plasmas. Then, a variety of interesting characteristics of detached recombining plasmas, which are important in reducing the plasma heat flow, are discussed: generation and structure of plasma detachment, light emission originating from a series of highly excited Rydberg states of atoms, contribution of molecular activated recombination (MAR), transition between conventional electron–ion recombination (EIR) and MAR, relation to dust coagulation processes and the experimental verification of plasma detachment in tokamak fusion devices. Finally, the dynamic behaviour of the detached EIR plasma obtained in the linear divertor plasma simulator NAGDIS-II against the ELM-like heat pulse is shown.