Scaling of heat transport with beta in the DIII-D tokamak
Scaling of heat transport with beta in the DIII-D tokamak
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DIII-D 托卡马克中的 β 热传输缩放
DOI：
10.1088/0029-5515/38/8/306
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发表时间：
1998
期刊：
影响因子：
3.3
通讯作者：
M. Wade
中科院分区：
文献类型：
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作者：
C. Petty;T. Luce;J. Deboo;R. Waltz;D. Baker;M. Wade
在DIII-D托卡马克装置上的实验已经测量了β(β)的热输运标度，而对于H模和L模等离子体，所有其他无量纲参数都保持不变。热传输的Beta标度的实验结果有助于区分各种提出的湍流传输机制。对于L模等离子体，热输运的β标度在0.26≤βN≤0.49范围内接近于零，热约束时间标度为BτTH∝β-0.05±0.10，有效(或单一流体)热扩散系数标度为χEff∝χBβ0.11±0.20。在实验误差范围内，离子和电子热扩散系数的β标度与有效扩散系数相同。在H模等离子体中研究了较高的β值，在0.8≤βN≤1.7范围内观察到弱到中等的输运β标度，热限制时间标度为BτTH∝β0.03±0.11，有效热扩散系数标度为χEff∝χBβ-0.54±0.21。离子通道负责对H模等离子体进行有利的β定标；电子通道没有可测量的β依赖性。这些由无量纲参数扫描确定的β标度比目前用于预测热核实验堆性能的L模式和H模限制标度表达式预测的β标度要弱得多。
Experiments in the DIII-D tokamak have measured the scaling of heat transport with beta (β) while all other dimensionless parameters are held constant for both H mode and L mode plasmas. Experimental results from the beta scaling of heat transport help to differentiate between various proposed mechanisms of turbulent transport. For L mode plasmas, the beta scaling of heat transport over the range 0.26 ≤ βN ≤ 0.49 is close to zero, with the thermal confinement time scaling as Bτth ∝ β-0.05±0.10 and the effective (or one fluid) thermal diffusivity scaling as χeff ∝ χBβ0.11±0.20. The beta scalings of the ion and electron thermal diffusivities are the same as the effective diffusivity to within the experimental errors. Higher values of beta are investigated in H mode plasmas, where a weak-to-moderate beta scaling of transport is observed over the range 0.8 ≤ βN ≤ 1.7, with the thermal confinement time scaling as Bτth ∝ β0.03±0.11 and the effective thermal diffusivity scaling as χeff ∝ χBβ-0.54±0.21. The ion channel is responsible for the favourable beta scaling of H mode plasmas; the electron channel has no measurable beta dependence. These beta scalings determined by dimensionless parameter scans are much weaker than the predicted beta scalings from the L mode and H mode confinement scaling expressions that are currently being used to predict the performance of ITER.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
K. Kusano：“反向场箍缩配置中非线性动力学的仿真研究”。
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