Quantifying Fusion Born Ion Populations in Magnetically Confined Plasmas using Ion Cyclotron Emission.
Quantifying Fusion Born Ion Populations in Magnetically Confined Plasmas using Ion Cyclotron Emission.
复制标题
使用离子回旋发射来量化磁约束等离子体中的聚变产生离子群。
DOI：
10.1103/physrevlett.118.105001
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发表时间：
2017
影响因子：
8.6
通讯作者：
Carbajal L
中科院分区：
文献类型：
--
作者：
Carbajal L
离子回旋发射（ICE）提供了一个独特的承诺，作为诊断的融合出生的α粒子人口在磁约束等离子体。JET和TFTR的开创性观测发现，ICE强度与聚变反应的测量中子通量近似呈线性关系，并与等离子体中聚变产生的α粒子的推断浓度近似呈线性关系。我们提出了完全非线性自洽动力学模拟，再现这种缩放的第一次。这解决了一个长期存在的问题，在物理学的融合α粒子约束和稳定的磁约束聚变等离子体。它证实了磁声回旋不稳定性作为可能的发射机制，并大大加强了诊断开发的ICE在未来的燃烧等离子体的基础。
Ion cyclotron emission (ICE) offers a unique promise as a diagnostic of the fusion born alpha-particle population in magnetically confined plasmas. Pioneering observations from JET and TFTR found that ICE intensityscales approximately linearly with the measured neutron flux from fusion reactions, and with the inferred concentration,, of fusion born alpha particles confined within the plasma. We present fully nonlinear self-consistent kinetic simulations that reproduce this scaling for the first time. This resolves a long-standing question in the physics of fusion alpha-particle confinement and stability in magnetic confinement fusion plasmas. It confirms the magnetoacoustic cyclotron instability as the likely emission mechanism and greatly strengthens the basis for diagnostic exploitation of ICE in future burning plasmas.