Plasma and Fusion Research

Volume 15, 1401048 (2020)

Regular Articles

Plasma Excitation in a DC Linear Magnetic Field by a Duoplasmatron Plasma Cathode
Jhoelle Roche M. GUHIT, Arnold Rey B. GINES, Kenta DOI and Motoi WADA
Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan
(Received 17 May 2020 / Accepted 25 May 2020 / Published 15 July 2020)


A 280 G linear magnetic field sustained a 2.5 mm diameter stable hydrogen plasma column produced by a duoplasmatron plasma cathode. A high-intensity magnetic field created by a pair of permanent magnets and the field compression structure realized the passage of a dense plasma flow through a 2 mm diameter hole. Both ions and electrons can be extracted from the downstream plasma where a linear magnetic field can be induced to guide the plasma for striking a tungsten target. Luminous intensity distribution around a tungsten target located at another end of the magnetic field confronting to the plasma cathode was examined. A substantial reduction in the Hα line spectral broadening was observed that enabled a precise spectroscopic study of the hydrogen particle reflection at the solid target surface.


particle reflection, tungsten, duoplasmatron ion source, plasma cathode

DOI: 10.1585/pfr.15.1401048


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