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H-mode power threshold and confinement in JET H, D, D-T and T plasmas

机译:JET H,D,D-T和T等离子体中的H模式功率阈值和限制

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The isotope dependence of the H-mode power threshold and the energy confinement time have been examined in dedicated experiments on the Joint European Torus (JET) in hydrogen, deuterium and tritium plasmas. The results show that: (1) The H-mode power threshold is inversely proportional to the effective isotopic mass, M, of the plasma. (2) The edge electron pedestal temperature at the L to H-mode transition scales as M-0.5. (3) The global thermal energy confinement time, tau(th), does not depend strongly on M, i.e. in the ohmic, L-mode, edge localized modes (ELMy) and ELM-free H-mode confinement regimes tau(th) proportional to M-alpha with lpha less than or equal to 0 2, if the engineering parameters such as current, magnetic field, density, power and geometry are kept fixed. (4) In the ELMy H-mode regime the transport in the core and the edge of the plasma scale differently with M, i.e. the core transport increases weakly with M whereas the edge transport decreases strongly with M. [References: 51]
机译:H型功率阈值的同位素依赖性和能量限制时间已在氢,氘和tri等离子体中的联合欧洲圆环(JET)上进行的专用实验中进行了检验。结果表明:(1)H模式功率阈值与等离子体的有效同位素质量M成反比。 (2)在从L到H模式的跃迁中,边缘电子基座温度为M-0.5。 (3)全局热能约束时间tau(th)与M的依赖性不大,即在欧姆,L模式,边缘局部模式(ELMy)和无ELM的H模式约束条件tau(th)中如果工程参数(例如电流,磁场,密度,功率和几何形状)保持固定,则 alpha小于或等于0 2时与M-alpha成比例。 (4)在ELMy H模式下,核中和等离子体边缘的迁移随M的变化而不同,即,核中的迁移随M的增加而弱,而边缘迁移随M的下降而强烈。[参考文献:51]

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