Ion acceleration in a solenoid-free plasma expanded by permanent magnets

K. Takahashi, K. Oguni, H. Yamada, T. Fujiwara

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


Ion acceleration is achieved in a low-pressure solenoid-free plasma expanded by permanent magnet arrays. Although a permanent magnet normally forms cusp magnetic fields which prevents plasma diffusion and double layer formation, by employing double concentric arrays of permanent magnets, a constant field area, and a diverging magnetic field can be generated near the outlet of the plasma source. In the source, a rapid potential drop with 4 cm thickness from 50 V to 20 V is generated at the diverging field area for 0.35 mTorr and a supersonic ion beam accelerated through the potential drop is observed in the diffusion chamber. The beam energy can be increased up to over 40 eV with a decrease in gas pressure.

Original languageEnglish
Article number084501
JournalPhysics of Plasmas
Issue number8
Publication statusPublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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