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arXiv 2109.01042physics.plasm-ph
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俘获电子的有效能量及其与湍流输运的关系

The available energy of trapped electrons and its relation to turbulent transport

R. J. J. Mackenbach, J. H. E. Proll, P. Helander

摘要:

无碰撞等离子体具有一定量的“可用能量”,这是热能中可以转化为场能的那部分。本文计算了在细长非均质等离子体流管中俘获电子所携带的有效能量。这个量进行了比较与陀螺动力学模拟的非线性饱和径向能量通量所产生的湍流驱动的碰撞捕获的电子模式在各种仿星器和托卡马克。可用能量的数值计算是非常快的,并显示出很强的相关性与湍流的能量通量中发现的gyrokinetic模拟。事实上,能量通量被发现与可用能量的大约3/2次方成比例,正如人们从简单的唯象模型所期望的那样。

英文摘要:

A collisionless plasma possesses a certain amount of "available energy", which is that part of the thermal energy that can be converted into field energy. Here, a calculation is presented of the available energy carried by trapped electrons in a slender non-omnigenous flux tube of plasma. This quantity is compared with gyrokinetic simulations of the nonlinear saturated radial energy flux resulting from turbulence driven by collisionless trapped-electron modes in various stellarator and a tokamak. The numerical calculation of available energy is extremely fast and shows a strong correlation with the turbulent energy fluxes found in the gyrokinetic simulations. Indeed, the energy flux is found to be proportional to the available energy to the power of approximately 3/2, as one would expect from a simple phenomenological model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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