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arXiv 1408.3776physics.plasm-ph
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等离子体中带正电尘埃颗粒的充电和集热

Charging and heat collection by a positively charged dust grain in a plasma

Gian Luca Delzanno, Xian-Zhu Tang

摘要:

尘埃粒子浸入准中性等离子体中可以在几个重要的应用中发射电子。一旦电子发射变得足够强,尘埃就进入带正电的状态,在这种状态下,由于对被捕获电子的势阱效应,传统的轨道运动限制(OML)理论可能会崩溃。在所谓的OML $^+$方法中,对捕获通过边界近似进行了最小修改,以准确地预测粉尘尺寸和温度在很宽范围内的粉尘电荷和集热通量。

英文摘要:

Dust particulates immersed in a quasineutral plasma can emit electrons in several important applications. Once electron emission becomes strong enough, the dust enters the positively charged regime where the conventional Orbital-Motion-Limited (OML) theory can break down due to potential well effects on trapped electrons. A minimal modification of the trapped-passing boundary approximation in the so-called OML$^+$ approach is shown to accurately predict the dust charge and heat collection flux for a wide range of dust size and temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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