arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1706.02170physics.plasm-ph
收藏

等离子体中单个微粒子的尺寸和密度演化

Size and Density Evolution of a Single Microparticle Embedded in a Plasma

O. H. Asnaz, H. Jung, F. Greiner, A. Piel

摘要:

本文介绍了两种测量技术,以确定一个单一的尘埃粒子的直径在等离子体操作。使用长距离显微镜(LDM),从等离子体室外部对颗粒进行成像。结合相位分辨共振测量,在几个小时内测量体积平均颗粒质量密度的发展。测量结果表明,由于表面上的等离子体蚀刻过程,聚甲基丙烯酸甲酯(PMMA)颗粒的质量密度显着降低。这是解释的核壳模型,并支持LDM图像中看到的表面粗糙度效应,一个离焦成像的角度米氏散射图案和非原位激光散射显微镜测量。

英文摘要:

This article presents two measurement techniques to determine the diameter of a single dust particle during plasma operation. Using long-distance microscopy (LDM), the particle is imaged from outside the plasma chamber. In combination with phase-resolved resonance measurements the development of the volume-averaged particle mass density is measured over several hours. The measurements show a significant decrease of mass density for polymethyl methacrylate (PMMA) particles due to a plasma etching process on the surface. This is explained by a core-shell model and is supported by a surface roughness effect seen in the LDM images, an out-of-focus imaging of the angular Mie scattering pattern and ex-situ laser scattering microscopy measurements.

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。

↑