Impact of phase-space turbulence on drift-wave transport in toroidal fusion plasmas

相空间湍流对环形聚变等离子体中漂移波输运的影响

• 批准号: 15K18305
• 负责人: Lesur Maxime
• 金额: $ 1.16万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2015
• 资助国家: 日本
• 起止时间: 2015-04-01 至 2016-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15K18305/
• 关键词: hot plasmas; magnetic fusion; turbulence; turbulent transport; phase space

We identified a new way that nonlinear trapping of particles by plasma wave can affect the perturbations and flows of plasma. To do this, we have developed a new mathematical model, and the corresponding numerical simulation code. The simulations are in qualitative agreement with experiments on the Large Helical Device, and suggest a new mechanism of instability, which requires a sustained collaboration between real-space nonlinearities, and phase-space nonlinearities. In addition, we discussed the problem of spurious entropy production in kinetic simulations of plasma turbulence, which is tied to the filamentation problem due to nonlinear trapping. We showed how this entropy error depends on simulation and physical parameters. These results are summarized in four papers, one of which is submitted to Physical Review Letter, another one is submitted to Computer Physics Communication, and two others are in preparation.

我们发现了等离子体波非线性捕获粒子影响等离子体扰动和流动的新途径。为此，我们开发了新的数学模型，以及相应的数值模拟代码。模拟结果与大螺旋装置的实验结果在定性上一致，并提出了一种新的不稳定机制，该机制需要实空间非线性和相空间非线性之间的持续协作。此外，我们还讨论了等离子体湍流动力学模拟中的伪熵产生问题，该问题与非线性俘获引起的成丝问题有关。我们展示了熵误差是如何依赖于模拟和物理参数的。这些结果总结为四篇论文，其中一篇提交给Physical Review Letter，一篇提交给Computer Physics Communication，另外两篇正在准备中。

项目成果

The phase-space: a tool to unravel the mysteries of phase-space

相空间：解开相空间之谜的工具

• 发表时间: 2015
• 作者: M. Lesur

Nonlinear destabilization of energetic particle-driven modes

高能粒子驱动模式的非线性失稳

• 发表时间: 2015
• 作者: Shigeo Maruyama;Kehang Cui;Bo Hou;Hua An;Hiroki Takezaki;Rong Xiang;Shohei Chiashi;Eguchi K.;Soichiro Kishi;M. Lesur
• 通讯作者: M. Lesur