Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 52, Issue 32, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab2525
Keywords
plasma-assisted contamination control; dusty plasma; charge measurement; spatial afterglow
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Funding
- VDL enabling technologies group
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In this letter, we present charge measurements of micro-particles in the spatial afterglow (remote plasma) of an inductively coupled low pressure radiofrequency plasma. The particle afterglow charge of (-30 +/- 7) e, being deducted from their acceleration in an externally applied electric field, is about three orders of magnitude lower compared to the typical charge expected in the bulk of such plasmas. This difference is explained by a relatively simplistic analytical model applying orbital motion limited theory in the afterglow region. From an application perspective, our results enable further understanding and development of in situ plasma-based particle contamination control for ultra-clean low pressure environments.
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