Characterization of the temperature of free electrons diffusing from a magnetically expanding current-free double layer plasma

Kazunori Takahashi, Christine Charles, Rod Boswell, Michael A. Lieberman, Rikizo Hatakeyama

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Electron temperature is characterized in a low-pressure argon plasma diffusing from a magnetically expanding radiofrequency plasma containing a current-free double layer (DL) over the argon gas pressure of 0.3-3 mTorr. The measured electron energy probability function (EEPF) is Maxwellian at the downstream side of the DL, while the upstream EEPF shows a depleted tail corresponding to free electrons, which can overcome the potential drop of the DL and diffuse into the downstream side. The free electrons relating to the amplitude of the DL electrically neutralize a supersonic ion beam accelerated by the DL. The electron temperature measured at the downstream plasma is found to be in good agreement with that of the free electrons in the upstream source tube and agrees with the numerical result given from low-pressure diffusion theory.

Original languageEnglish
Article number162001
JournalJournal of Physics D: Applied Physics
Volume43
Issue number16
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Characterization of the temperature of free electrons diffusing from a magnetically expanding current-free double layer plasma'. Together they form a unique fingerprint.

Cite this