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Title: Spatially resolved study of primary electron transport in magnetic cusps

Abstract

Spatially resolved primary electron current density profiles were measured using a planar Langmuir probe in the region above a magnetic cusp in a small ion thruster discharge chamber. The probe current maps obtained were used to study the electron collection mechanics in the cusp region in the limit of zero gas flow and no plasma production, and they allowed for the visualization of primary electron transport through the cusp. Attenuation coefficients and loss widths were calculated as a function of probe distance above the anode at various operating conditions. Finally, the collection mechanics between two magnetic cusps were studied and compared. It was found that primary electron collection was dominated by the upstream magnet ring.

Authors:
;  [1]
  1. Graduate Research Assistant, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)
Publication Date:
OSTI Identifier:
22051363
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films
Additional Journal Information:
Journal Volume: 30; Journal Issue: 1; Other Information: (c) 2012 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1553-1813
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANODES; ATTENUATION; CHARGED-PARTICLE TRANSPORT; CURRENT DENSITY; CUSPED GEOMETRIES; ELECTRIC DISCHARGES; ELECTRONS; GAS FLOW; ION THRUSTERS; LANGMUIR PROBE; MAGNETS; PLASMA PRODUCTION; SPATIAL RESOLUTION

Citation Formats

Hubble, Aimee A, Foster, John E, and Associate Professor, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109. Spatially resolved study of primary electron transport in magnetic cusps. United States: N. p., 2012. Web. doi:10.1116/1.3656742.
Hubble, Aimee A, Foster, John E, & Associate Professor, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109. Spatially resolved study of primary electron transport in magnetic cusps. United States. https://doi.org/10.1116/1.3656742
Hubble, Aimee A, Foster, John E, and Associate Professor, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109. Sun . "Spatially resolved study of primary electron transport in magnetic cusps". United States. https://doi.org/10.1116/1.3656742.
@article{osti_22051363,
title = {Spatially resolved study of primary electron transport in magnetic cusps},
author = {Hubble, Aimee A and Foster, John E and Associate Professor, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109},
abstractNote = {Spatially resolved primary electron current density profiles were measured using a planar Langmuir probe in the region above a magnetic cusp in a small ion thruster discharge chamber. The probe current maps obtained were used to study the electron collection mechanics in the cusp region in the limit of zero gas flow and no plasma production, and they allowed for the visualization of primary electron transport through the cusp. Attenuation coefficients and loss widths were calculated as a function of probe distance above the anode at various operating conditions. Finally, the collection mechanics between two magnetic cusps were studied and compared. It was found that primary electron collection was dominated by the upstream magnet ring.},
doi = {10.1116/1.3656742},
url = {https://www.osti.gov/biblio/22051363}, journal = {Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films},
issn = {1553-1813},
number = 1,
volume = 30,
place = {United States},
year = {2012},
month = {1}
}