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Title: Measurement of bi-directional ion acceleration along a convergent-divergent magnetic nozzle

Abstract

Bi-directional plasma expansion resulting in the formation of ion beams travelling in opposite directions is respectively measured in the converging and diverging parts of a magnetic nozzle created using a low-pressure helicon radio-frequency plasma source. The axial profile of ion saturation current along the nozzle is closely correlated to that of the magnetic flux density, and the ion “swarm” has a zero convective velocity at the magnetic throat where plasma generation is localized, thereby balancing the bi-directional particle loss. The ion beam potentials measured on both sides of the magnetic nozzle show results consistent with the maximum plasma potential measured at the throat.

Authors:
; ;  [1]
  1. Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, The Australian National University, Bldg. 60, Mills Road, Australian Capital Territory 2601 (Australia)
Publication Date:
OSTI Identifier:
22591428
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 10; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELERATION; FLUX DENSITY; ION BEAMS; MAGNETIC FLUX; NOZZLES; PARTICLE LOSSES; PLASMA; PLASMA EXPANSION; PLASMA POTENTIAL; RADIOWAVE RADIATION

Citation Formats

Zhang, Yunchao, Charles, Christine, and Boswell, Rod. Measurement of bi-directional ion acceleration along a convergent-divergent magnetic nozzle. United States: N. p., 2016. Web. doi:10.1063/1.4943583.
Zhang, Yunchao, Charles, Christine, & Boswell, Rod. Measurement of bi-directional ion acceleration along a convergent-divergent magnetic nozzle. United States. doi:10.1063/1.4943583.
Zhang, Yunchao, Charles, Christine, and Boswell, Rod. Mon . "Measurement of bi-directional ion acceleration along a convergent-divergent magnetic nozzle". United States. doi:10.1063/1.4943583.
@article{osti_22591428,
title = {Measurement of bi-directional ion acceleration along a convergent-divergent magnetic nozzle},
author = {Zhang, Yunchao and Charles, Christine and Boswell, Rod},
abstractNote = {Bi-directional plasma expansion resulting in the formation of ion beams travelling in opposite directions is respectively measured in the converging and diverging parts of a magnetic nozzle created using a low-pressure helicon radio-frequency plasma source. The axial profile of ion saturation current along the nozzle is closely correlated to that of the magnetic flux density, and the ion “swarm” has a zero convective velocity at the magnetic throat where plasma generation is localized, thereby balancing the bi-directional particle loss. The ion beam potentials measured on both sides of the magnetic nozzle show results consistent with the maximum plasma potential measured at the throat.},
doi = {10.1063/1.4943583},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 10,
volume = 108,
place = {United States},
year = {2016},
month = {3}
}