Understanding cross-field anomalous transport is a central issue in the magnetic confinement fusion research. Recently, a long range large avalanche electron heat transport event has been observed in HL-2A neutral beam injection heated low-confinement mode (L-mode) plasmas. It is found and identified firstly that the non-linear mode couplings between high-frequency core-localized toroidal Alfvén eigenmodes and low-frequency fishbone mode with ##IMG## [http://ej.iop.org/images/0029-5515/60/9/094003/nfaba5a5ieqn1.gif] {$m/n = 2/1$} , where m and n are poloidal and toroidal mode-numbers, respectively, trigger the avalanche transport event within several hundred Alfvén times. This finding can help to understand the generation mechanism of avalanche transport events, and is also expected to shed light on the importance of the non-linear multiple mode couplings in fusion and burning plasmas.

中文翻译：

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HL-2A中性束注入加热的L型等离子体中非线性模式耦合触发的雪崩电子热传输事件

了解跨场异常输运是磁约束聚变研究的中心问题。最近，在HL-2A中性束注入加热的低约束模式（L-mode）等离子体中观察到了远距离大雪崩电子传热事件。首先发现并确定了使用## IMG ## [http://ej.iop.org/images/0029-]的高频核心局部环形Alfvén本征模式与低频鱼骨模式之间的非线性模式耦合。 5515/60/9/094003 / nfaba5a5ieqn1.gif] {$ m / n = 2/1 $}，其中m和n分别是极性和环形模数，在数百次Alfvén时间内触发了雪崩传输事件。这一发现有助于了解雪崩传输事件的产生机理，