2024
DOI: 10.1063/5.0192191
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Evolution of solid-in-hollow structured plasma bullet: Modulated by pulse repetition frequency and rising time

Dingyuan Peng,
Yongqiang Fu,
Ruobing Zhang
et al.

Abstract: Plasma bullets in atmospheric pressure plasma jets have drawn much scholarly attention in the past decade, especially its shape. This Letter reports the formation and evolution mechanism of a solid-in-hollow structured bullet. At high pulse repetition frequency (≥20 kHz) and long rising time (≥200 ns), the traditional hollow ring bullet turns into the solid-in-hollow structure, and the plasma plume correspondingly appears as a purple external plume with an extra internal filamentary red core under bare eyes. A… Show more

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