Isotope mass scaling and transport comparison between JET Deuterium and Tritium L-mode plasmas
Isotope mass scaling and transport comparison between JET Deuterium and Tritium L-mode plasmas
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JET 氘和氚 L 模式等离子体之间的同位素质量缩放和传输比较
DOI：
10.1088/1741-4326/acea94
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发表时间：
2023
期刊：
影响因子：
3.3
通讯作者：
J. Contributors
中科院分区：
文献类型：
--
作者：
T. Tala;A. E. Järvinen;C. Maggi;P. Mantica;A. Mariani;A. Salmi;I. Carvalho;A. Chomiczewska;E. Delabie;F. Devasagayam;J. Ferreira;W. Gromelski;N. Hawkes;L. Horvath;J. Karhunen;D. King;A. Kirjasuo;E. Kowalska;S. Leerink;M. Lennholm;B. Lomanowski;M. Maslov;S. Menmuir;R. Morales;R. Sharma;H. Sun;K. Tanaka;J. Contributors
在电子加热（NBI+欧姆加热）的JET L模式下，实现了ρ ε、ν ε、β n、q和Te/Ti匹配的纯氘和纯氚等离子体间的无量纲同位素质量定标实验。氚等离子体的能量约束时间BtτE，th/A比等离子体高28%。这可以用无量纲能量约束标度律的形式表示为ΩiτE，th <$A 0.48 ±0.16。因此，在缩放的单流体热扩散系数A xeff/Bt中可以看到这种显著的同位素质量缩放，其在整个等离子体半径上在氚等离子体中低约50%。粒子输运通道中的同位素质量依赖性可以忽略不计，这也得到了具有喷气调制的微扰粒子输运分析的支持。从EDGE 2D-EIRENE模拟的边缘粒子燃料或电离配置文件的比较表明，绝对的密度差，是必要的无量纲的匹配在密闭等离子体中占主导地位的任何同位素质量依赖的粒子燃料和电离配置文件在等离子体边缘。局部GENE模拟结果表明，在ρtor = 0.6时，存在轻微的反gyro-Bohm效应，因此，氚对热输运的同位素质量依赖性较小，对粒子输运的影响可忽略不计。在GENE和ASTRA-TGLF-SAT 2模拟中，通过简单地改变相同输入剖面的同位素质量，没有捕获在氚等离子体中观察到的同位素缩放和热传输减少的显著部分。
The dimensionless isotope mass scaling experiment between pure Deuterium and pure Tritium plasmas with matched ρ∗ , ν∗ , β n , q and Te/Ti has been achieved in JET L-mode with dominant electron heating (NBI+ohmic) conditions. 28% higher scaled energy confinement time BtτE,th/A is found in favour of the Tritium plasma. This can be cast in the form of the dimensionless energy confinement scaling law as ΩiτE,th∼A0.48±0.16 . This significant isotope mass scaling is consequently seen in the scaled one-fluid heat diffusion coefficient Aχeff/Bt which is around 50% lower in the Tritium plasma throughout the whole plasma radius. The isotope mass dependence in the particle transport channel is negligible, supported also by the perturbative particle transport analysis with gas puff modulation. The comparison of the edge particle fuelling or ionisation profiles from the EDGE2D-EIRENE simulations show that the absolute density differences that are necessary for the dimensionless match in the confined plasma dominate over any isotope mass dependencies of particle fuelling and ionization profiles at the plasma edge. Local GENE simulation results indicate a mild anti-gyroBohm effect at ρtor = 0.6 and thereby a small isotope mass dependence in favour of Tritium on heat transport and a negligible effect on particle transport. A significant fraction of the isotope scaling and reduced heat transport observed in the Tritium plasma is not captured in the GENE and ASTRA-TGLF-SAT2 simulations by simply changing the isotope mass for the same input profiles.
JET-ILW I 型 ELMy H 模式等离子体中氚的热和粒子输运的同位素物理
影响因子：
3.3
作者：
Schneider P
通讯作者：
Schneider P