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Title: Ion optical effects in a low pressure rf plasma

Abstract

Ion optical effects in low pressure gas discharges are introduced as a novel input into low pressure plasma technology. They are based on appropriate geometrical plasma confinements which enable a control of the shape of internal density and potential distributions and, hence, the ion motion in the plasma bulk. Such effects are exemplified for an electron cyclotron wave resonance plasma in Ar at 1–5 × 10{sup −3} millibars. The geometry of the plasma chamber is modified by a conical and a cylindrical insert. Computer simulations display spherical plasma density contours to be formed around the conical confinement. This effects an increase of the ratio of the ion currents into the conical and the cylindrical inserts which depends on the fourth power of the plasma electron temperature. A quantitative understanding of this behavior is presented. As another essential result, the shape of the internal plasma contours is found to be independent of the pressure controlled plasma parameters.

Authors:
;  [1]
  1. Institute for Surface and Thin Film Analysis IFOS and Department of Physics, Technical University of Kaiserslautern, D-67663 Kaiserslautern (Germany)
Publication Date:
OSTI Identifier:
22224107
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films
Additional Journal Information:
Journal Volume: 31; Journal Issue: 6; Other Information: (c) 2013 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0734-2101
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; CONTROL; CURRENTS; ELECTRIC DISCHARGES; ELECTRON TEMPERATURE; IONS; PLASMA CONFINEMENT; PLASMA DENSITY; PRESSURE RANGE KILO PA; PRESSURE RANGE PA

Citation Formats

Oechsner, Hans, and Paulus, Hubert. Ion optical effects in a low pressure rf plasma. United States: N. p., 2013. Web. doi:10.1116/1.4823104.
Oechsner, Hans, & Paulus, Hubert. Ion optical effects in a low pressure rf plasma. United States. https://doi.org/10.1116/1.4823104
Oechsner, Hans, and Paulus, Hubert. 2013. "Ion optical effects in a low pressure rf plasma". United States. https://doi.org/10.1116/1.4823104.
@article{osti_22224107,
title = {Ion optical effects in a low pressure rf plasma},
author = {Oechsner, Hans and Paulus, Hubert},
abstractNote = {Ion optical effects in low pressure gas discharges are introduced as a novel input into low pressure plasma technology. They are based on appropriate geometrical plasma confinements which enable a control of the shape of internal density and potential distributions and, hence, the ion motion in the plasma bulk. Such effects are exemplified for an electron cyclotron wave resonance plasma in Ar at 1–5 × 10{sup −3} millibars. The geometry of the plasma chamber is modified by a conical and a cylindrical insert. Computer simulations display spherical plasma density contours to be formed around the conical confinement. This effects an increase of the ratio of the ion currents into the conical and the cylindrical inserts which depends on the fourth power of the plasma electron temperature. A quantitative understanding of this behavior is presented. As another essential result, the shape of the internal plasma contours is found to be independent of the pressure controlled plasma parameters.},
doi = {10.1116/1.4823104},
url = {https://www.osti.gov/biblio/22224107}, journal = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},
issn = {0734-2101},
number = 6,
volume = 31,
place = {United States},
year = {Fri Nov 15 00:00:00 EST 2013},
month = {Fri Nov 15 00:00:00 EST 2013}
}