We present the first observations of dust charging and mobilization in a combined vacuum ultraviolet (VUV) and plasma environment. It is experimentally demonstrated that exposing photoemitting dust particles to a low-density plasma enhanced the charge on the particles, accompanied by a significant increase in dust mobilization compared to VUV or plasma exposure alone. Measurements of the dust charge support a proposed ‘charge pumping’ mechanism, in which ambient electrons are collected by photoemitting dust surfaces, causing more photoelectrons to be pumped onto surrounding dust particles, increasing repulsive forces and leading to enhanced mobilization.

中文翻译：

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在低密度等离子体中增强发光尘埃颗粒的充电和移动


我们首次观察到了真空紫外线 （VUV） 和等离子体组合环境中的粉尘充注和动员。实验证明，与单独使用 VUV 或等离子体暴露相比，将发光尘埃颗粒暴露在低密度等离子体中会增强粒子上的电荷，同时伴随着尘埃动员的显着增加。尘埃电荷的测量支持一种拟议的“电荷泵送”机制，其中环境电子通过发光尘埃表面收集，导致更多的光电子被泵送到周围的尘埃颗粒上，增加排斥力并导致增强动员。