Magnetopause Kelvin‐Helmholtz (KH) waves are believed to mediate solar wind plasma transport via small‐scale mechanisms. Vortex‐induced reconnection (VIR) was predicted in simulations and recently observed using NASA's Magnetospheric Multiscale (MMS) mission data. Flux Transfer Events (FTEs) produced by VIR at multiple locations along the periphery of KH waves were also predicted in simulations, but detailed observations were still lacking. Here we report MMS observations of an FTE‐type structure in a KH wave trailing edge during KH activity on 5 May 2017 on the dawnside flank magnetopause. The structure is characterized by (1) bipolar magnetic B _Y variation with enhanced core field (B _Z ) and (2) enhanced total pressure with dominant magnetic pressure. The cross‐section size of the FTE is found to be consistent with vortex‐induced flux ropes predicted in the simulations. Unexpectedly, we observe an ion jet (V _Y ); electron parallel heating, ion, and electron density enhancements; and other signatures that can be interpreted as a reconnection exhaust at the FTE central current sheet. Moreover, pitch angle distributions of suprathermal electrons on either side of the current sheet show different properties, indicating different magnetic connectivities. This FTE‐type structure may thus alternatively be interpreted as two interlaced flux tubes with reconnection at the interface as reported by Kacem et al. (2018) and Øieroset et al. (2019s). The structure may be the result of interaction between two flux tubes, likely produced by multiple VIR at the KH wave trailing edge, and constitutes a new class of phenomenon induced by KH waves.

中文翻译：

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磁停顶开尔文-亥姆霍兹波中的磁通量传递事件样结构内部的磁重连接

磁滞顶开尔文-亥姆霍兹（KH）波被认为通过小规模机制介导了太阳风等离子体的传输。涡旋重连（VIR）是在模拟中进行预测的，最近使用NASA的磁层多尺度（MMS）任务数据进行了观测。在模拟中还预测了由VIR在KH波外围的多个位置产生的通量传递事件（FTE），但仍缺乏详细的观察结果。在这里，我们报告了MMS在2017年5月5日发生的KH活动期间在KH波后缘的FTE型结构的观察结果，该事件发生在黎明侧胁磁绝经期。该结构的特征在于（1）双极磁性乙_ÿ具有增强芯场变化（乙_ž）和（2）以主导磁力提高总压力。发现FTE的横截面尺寸与模拟中预测的涡流通量绳一致。出乎意料的是，我们观察到离子射流（V _Y）; 电子平行加热，离子和电子密度增强；和其他签名，可以解释为FTE中央电流表上的重新连接信息。而且，电流片两侧的超热电子的俯仰角分布显示出不同的特性，表明不同的磁连通性。因此，这种FTE型结构可以解释为两个交错的通量管，在接口处重新连接，正如Kacem等人报道的那样。（2018）和Øieroset等。（2019年代）。该结构可能是两个通量管之间相互作用的结果，可能是由KH波后缘的多个VIR产生的，并构成了由KH波引起的一类新现象。