Review of hydrogen isotope effects on H-mode confinement in JT-60U
Review of hydrogen isotope effects on H-mode confinement in JT-60U
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氢同位素对 JT-60U 中 H 模式限制的影响综述
DOI：
10.1088/1361-6587/ac048c
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发表时间：
2021
影响因子：
2.2
通讯作者：
Narita E
中科院分区：
文献类型：
--
作者：
Urano H;Narita E
本文综述了JT-60 U中H模约束的氢同位素效应。在给定的吸收功率下，热能约束时间在氘中比在氢中长1.4倍。当吸收功率一定时，在整个小半径范围内，氘原子的电子温度和离子温度明显高于氢原子，而电子密度分布几乎相同。因此，有效热扩散率在氘中变得比在氢中相对低。当热存储的能量是固定的，相同的配置文件的电子密度，电子温度，和离子温度获得氢和氘等离子体，而所需的功率明显增加氢，这导致在减少氘的热扩散率。离子温度梯度（ITG）标度长度的倒数所需的一个给定的离子热扩散率增加了约1.2倍的氘相比，氢。类似的密度分布形成的氢和氘等离子体，尽管更高的湍流粒子通量的氢的情况下，表明湍流粒子传输更抑制在氘等离子体。回旋动力学计算表明，氘等离子体中电子轰击对透射电子显微镜的稳定作用更为显著，并导致了两种情况下准线性扩散系数的差异。的边缘核心相互作用导致的整体H-模式的限制也涉及到氢同位素组成的影响。边缘基座压力和全球极向β之间的相关性始终保持真实的同位素组成的差异无关。氘的全球极向β值较高，因为它的ITG尺度长度较小，并因为在热和快离子成分的额外存储的能量，后者是由于随着同位素质量的增加，减慢时间的增加。
Hydrogen isotope effects on H-mode confinement in JT-60U are reviewed. The thermal energy confinement time becomes longer in deuterium by a factor of∼ 1.4 than in hydrogen at a given absorbed power. When the absorbed power is fixed, the values of electron and ion temperature become evidently higher in deuterium than in hydrogen throughout the entire range of minor radius whereas the electron density profiles are nearly the same. Hence, the effective heat diffusivity becomes relatively lower in deuterium than in hydrogen. When the thermal stored energy is fixed, identical profiles for the electron density, electron temperature, and ion temperature are obtained for hydrogen and deuterium plasmas, whereas the required power clearly increases for hydrogen, which results in reduction of heat diffusivity for deuterium. The inverse of the ion-temperature-gradient (ITG) scale length required for a given ion heat diffusivity increased by a factor of approximately 1.2 for deuterium compared with that for hydrogen. Similar density profiles are formed for the hydrogen and deuterium plasmas despite the higher turbulent particle flux for the hydrogen case, suggesting that turbulent particle transport is more suppressed in the deuterium plasmas. The gyrokinetic calculation indicates that the stabilization effect of ei collisionality on the TEM is more significant for deuterium plasmas and causes the difference in the quasilinear diffusivity between the two cases. The edge-core interplay leading to the overall H-mode confinement is also addressed where the effect of the hydrogen isotopic composition was involved. The correlation between edge pedestal pressure and global poloidal beta holds true consistently regardless of the difference in the isotopic composition. A higher value of global poloidal beta was obtained for deuterium because of its smaller ITG scale length and because of the additional stored energy in the thermal and fast ion components, the latter due to an increase of slowing down time with an increase of isotopic mass.
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DOI：
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发表时间：
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期刊：
Comput. Phys. Commun 175
影响因子：
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通讯作者：
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DOI：
10.1088/1742-6596/123/1/012002
发表时间：
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期刊：
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DOI：
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发表时间：
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