Potential structure of discharge plasma inside liquid directly measured by an electrostatic probe

Qiang Chen, Toshiro Kaneko, Naoki Matsuda, Rikizo Hatakeyama

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Potential structures of a discharge plasma inside a liquid are investigated by an electrostatic probe measurement. The time evolution of radial profiles of the floating potential for the plasma inside liquid reveals that the dominant negative charges in the plasma are the negative ion species such as OH - and O2- rather than electrons. In addition, a positive potential gradient exists at the plasma-liquid interface due to the presence of an electrical double layer which is caused by the separation of low-mass positive ion of H+ and high-mass negative ions of OH - and O2- near the plasma-liquid interface.

Original languageEnglish
Article number244105
JournalApplied Physics Letters
Volume102
Issue number24
DOIs
Publication statusPublished - 2013 Jun 17

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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