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Peer-reviewedCC BYPhysical Review Research

Enhanced plasma production by ambipolar electric fields in convergent magnetic fields

  • Kazunori Takahashi
  • Christine Charles
  • Rod Boswell
  • Antonella Caldarelli
Open at sourceDOICite

Abstract

Controlled unidirectional remote plasma production in a radio-frequency (rf) plasma source is demonstrated by placing magnetic nozzle throat several tens of centimeters away from the rf antenna, where a local density peak forms near the throat. The experiment indicates that the dominant electron energization mechanism responsible for the density peak in the magnetic nozzle throat is electrostatic electron acceleration driven by a spontaneously formed ambipolar electric field, yielding an energy gain of approximately 5 eV and enhanced remote ionization. These results establish plasma sources driven by spontaneous electrostatic electron acceleration.

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Cite

BibTeXRIS
BibTeX
@article{takahashi2026enhanced,
  title = {{Enhanced plasma production by ambipolar electric fields in convergent magnetic fields}},
  author = {Kazunori Takahashi and Christine Charles and Rod Boswell and Antonella Caldarelli},
  journal = {Physical Review Research},
  year = {2026},
  month = jun,
  doi = {10.1103/86rf-6dvz},
  url = {https://hal.science/hal-05767431v1},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Enhanced plasma production by ambipolar electric fields in convergent magnetic fields
AU  - Kazunori Takahashi
AU  - Christine Charles
AU  - Rod Boswell
AU  - Antonella Caldarelli
PY  - 2026
DA  - 2026/06/22
JO  - Physical Review Research
DO  - 10.1103/86rf-6dvz
UR  - https://hal.science/hal-05767431v1
AB  - Controlled unidirectional remote plasma production in a radio-frequency (rf) plasma source is demonstrated by placing magnetic nozzle throat several tens of centimeters away from the rf antenna, where a local density peak forms near the throat. The experiment indicates that the dominant electron energization mechanism responsible for the density peak in the magnetic nozzle throat is electrostatic electron acceleration driven by a spontaneously formed ambipolar electric field, yielding an energy gain of approximately 5 eV and enhanced remote ionization. These results establish plasma sources driven by spontaneous electrostatic electron acceleration.
SN  - 2643-1564
SN  - 2643-1564
ER  -