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Title: The onset of plasma potential locking

Abstract

In this study, we provide insight into the role and impact that a positively biased electrode (anode) has on bulk plasma potential. Using two-dimensional Particle-in-Cell simulations, we investigate the plasma potential as an anode transitions from very small (“probe” mode) to large (“locking” mode). Prior theory provides some guidance on when and how this transition takes place. Initial experimental results are also compared. The simulations demonstrate that as the surface area of the anode is increased transitions in plasma potential and sheath polarity occur, consistent with experimental observations and theoretical predictions. It is expected that understanding this basic plasma behavior will be of interest to basic plasma physics communities, diagnostic developers, and plasma processing devices where control of bulk plasma potential is important.

Authors:
 [1];  [1];  [2];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Iowa, Iowa City, IA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1327907
Alternate Identifier(s):
OSTI ID: 1420679
Report Number(s):
SAND-2016-9434J
Journal ID: ISSN 1070-664X; PHPAEN; 647634
Grant/Contract Number:  
AC04-94AL85000; AC04-94SL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 6; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; anodes; plasma sheaths; dielectrics; computational models; plasma diagnostics

Citation Formats

Hopkins, Matthew M., Yee, Benjamin T., Baalrud, Scott D., and Barnat, Edward V.. The onset of plasma potential locking. United States: N. p., 2016. Web. https://doi.org/10.1063/1.4953896.
Hopkins, Matthew M., Yee, Benjamin T., Baalrud, Scott D., & Barnat, Edward V.. The onset of plasma potential locking. United States. https://doi.org/10.1063/1.4953896
Hopkins, Matthew M., Yee, Benjamin T., Baalrud, Scott D., and Barnat, Edward V.. Wed . "The onset of plasma potential locking". United States. https://doi.org/10.1063/1.4953896. https://www.osti.gov/servlets/purl/1327907.
@article{osti_1327907,
title = {The onset of plasma potential locking},
author = {Hopkins, Matthew M. and Yee, Benjamin T. and Baalrud, Scott D. and Barnat, Edward V.},
abstractNote = {In this study, we provide insight into the role and impact that a positively biased electrode (anode) has on bulk plasma potential. Using two-dimensional Particle-in-Cell simulations, we investigate the plasma potential as an anode transitions from very small (“probe” mode) to large (“locking” mode). Prior theory provides some guidance on when and how this transition takes place. Initial experimental results are also compared. The simulations demonstrate that as the surface area of the anode is increased transitions in plasma potential and sheath polarity occur, consistent with experimental observations and theoretical predictions. It is expected that understanding this basic plasma behavior will be of interest to basic plasma physics communities, diagnostic developers, and plasma processing devices where control of bulk plasma potential is important.},
doi = {10.1063/1.4953896},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = {2016},
month = {6}
}

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Works referenced in this record:

The Collection of Positive Ions by a Probe Immersed in a Plasma
journal, March 1957

  • Allen, J. E.; Boyd, R. L. F.; Reynolds, P.
  • Proceedings of the Physical Society. Section B, Vol. 70, Issue 3
  • DOI: 10.1088/0370-1301/70/3/303

The use of electrostatic probes for plasma diagnostics?A review
journal, June 1982

  • Cherrington, B. E.
  • Plasma Chemistry and Plasma Processing, Vol. 2, Issue 2
  • DOI: 10.1007/BF00633129

Mackenzie's Demon with instabilities
journal, October 2013


Manipulating the electron distribution through a combination of electron injection and MacKenzie’s Maxwell Demon
journal, May 2015


Global nonambipolar flow: Plasma confinement where all electrons are lost to one boundary and all positive ions to another boundary
journal, April 2007

  • Baalrud, S. D.; Hershkowitz, N.; Longmier, B.
  • Physics of Plasmas, Vol. 14, Issue 4
  • DOI: 10.1063/1.2722262

Response of the plasma to the size of an anode electrode biased near the plasma potential
journal, October 2014

  • Barnat, E. V.; Laity, G. R.; Baalrud, S. D.
  • Physics of Plasmas, Vol. 21, Issue 10
  • DOI: 10.1063/1.4897927

Particle-in-cell simulations of a current-free double layer
journal, June 2011

  • Baalrud, S. D.; Lafleur, T.; Boswell, R. W.
  • Physics of Plasmas, Vol. 18, Issue 6
  • DOI: 10.1063/1.3594565

Plasma Physics via Computer Simulation
book, January 1991


Theory of the electron sheath and presheath
journal, December 2015

  • Scheiner, Brett; Baalrud, Scott D.; Yee, Benjamin T.
  • Physics of Plasmas, Vol. 22, Issue 12
  • DOI: 10.1063/1.4939024

    Works referencing / citing this record:

    Radiation transport in kinetic simulations and the influence of photoemission on electron current in self-sustaining discharges
    journal, January 2017

    • Fierro, Andrew; Moore, Chris; Scheiner, Brett
    • Journal of Physics D: Applied Physics, Vol. 50, Issue 6
    • DOI: 10.1088/1361-6463/aa506c