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Errors in ram velocity and temperature measurements inferred from satellite-borne retarding potential analyzers

Phys. Plasmas 15, 062905 (2008); doi:10.1063/1.2936270

Published 24 June 2008

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J. H. Klenzing, G. D. Earle, and R. A. Heelis
William B. Hanson Center for Space Sciences, The University of Texas at Dallas, 800 W. Campbell Rd. WT15, Richardson, Texas 75080, USA
Retarding potential analyzers (RPAs) [Heelis and Hanson, Measurement Techniques in Space Plasmas, in Geophys. Monogr. Ser., Vol. 102 (AGU, Washington, D.C., 1998), p. 61] have been used extensively in space science over the past five decades to provide in situ estimates of ion velocities and temperatures. It has been shown previously that the use of biased grids in such instruments creates a nonuniform potential in the grid plane, which leads to errors in inferred parameters. A simulation of ion interactions with biased grids has been developed using a commercial finite-element analysis software package. Using a statistical approach, perturbations to the idealized RPA equation are discussed with the intent of developing quantitative corrections for the inferred parameters. The transparency of the grid stacks is found to be a function of particle energy and angle of attack. A preliminary case study is presented and compared to previous work. ©2008 American Institute of Physics
History: Received 5 March 2008; accepted 5 May 2008; published 24 June 2008
Permalink: http://link.aip.org/link/?PHPAEN/15/062905/1
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KEYWORDS and PACS

Keywords
PACS
  • 94.05.Rx
    Experimental techniques and laboratory studies (space plasma physics)
  • 95.30.Qd
    Astrophysical magnetohydrodynamics and plasmas
  • 52.70.Ds
    Electric and magnetic plasma diagnostic measurements
  • 52.30.-q
    Plasma dynamics and flow
  • 02.70.Dh
    Finite-element and Galerkin methods
  • YEAR: 2008

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ISSN:
1070-664X (print)   1089-7674 (online)
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REFERENCES (15)
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