Effect of local gas heating on a plasma structure driven at radio frequency in a microcell in Ar at atmospheric pressure

Masaki Yamasaki, Takashi Yagisawa, Toshiaki Makabe

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In a microplasma in Ar confined at atmospheric pressure, driven at 13.56 MHz, we theoretically investigate the whole structure of a lowtemperature plasma including the local distribution in gas temperature inside and outside a microcell. The governing equation of gas and wall temperature is combined with our original relaxation continuum model of an rf plasma. We demonstrate that electrons with intermediate energy play an important role in plasma production through stepwise ionization and metastable pooling in the presence of high-density metastables. Next, we examine the enhancement of the net ionization rate through the increase in the local reduced field under a broad minimum of the heated gas density. The atmospheric-pressure microcell plasma will be classified into a new spatiotemporal sustaining mechanism in the capacitively coupled plasma at 13.56MHz. This work predicts the presence of a nonequilibrium, steady plasma in a microcell even at atmospheric pressure in Ar under appropriate conditions.

Original languageEnglish
Article number036001
JournalJapanese Journal of Applied Physics
Volume53
Issue number3
DOIs
Publication statusPublished - 2014

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Gas heating
Atmospheric pressure
atmospheric pressure
radio frequencies
Plasmas
Ionization
gas temperature
Density of gases
Plasma sources
microplasmas
ionization
Gases
sustaining
wall temperature
gas density
Temperature
Electrons
continuums
augmentation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Effect of local gas heating on a plasma structure driven at radio frequency in a microcell in Ar at atmospheric pressure. / Yamasaki, Masaki; Yagisawa, Takashi; Makabe, Toshiaki.

In: Japanese Journal of Applied Physics, Vol. 53, No. 3, 036001, 2014.

Research output: Contribution to journalArticle

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