Screening Resonances In Plasmas

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When it was suggested that a new recombination mechanism (Resonant Radiative Recombination (RRR)) which, based on very general physical arguments, should happen in dense plasmas and promises to provide useful information for the local temperature and density diagnostics of plasmas, they assumed the existence of screening resonances. For model potentials the existence of screening resonances has been demonstrated beyond reasonable doubt in a number of calculations. The key question, how well those potentials describe the dominant effects of a real plasma remains open. The relation of theoretical predictions to experimentally measurable effects is an important issue at the present stage ... continued below

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6 p.

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Winkler, P. December 1, 1998.

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Description

When it was suggested that a new recombination mechanism (Resonant Radiative Recombination (RRR)) which, based on very general physical arguments, should happen in dense plasmas and promises to provide useful information for the local temperature and density diagnostics of plasmas, they assumed the existence of screening resonances. For model potentials the existence of screening resonances has been demonstrated beyond reasonable doubt in a number of calculations. The key question, how well those potentials describe the dominant effects of a real plasma remains open. The relation of theoretical predictions to experimentally measurable effects is an important issue at the present stage of their research. In particular, RRR is expected to account for enhanced recombination rates of low energetic electrons with their ions, since the first stage is the resonant capture of a slow electron by an atom or ion. The mechanism that traps an electron is a combination of complicated many-body interactions of the ions and electrons. For clarity they start here, however, with a discussion in terms of local potential traps the shapes of which are determined predominantly and in an average way by two factors: the degree of screening present at the ionic site and the degree of short-range order in the immediate neighborhood of this ion.

Physical Description

6 p.

Notes

INIS; OSTI as DE00002576

Medium: P; Size: 6 pages

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  • Other Information: PBD: 1 Dec 1998

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  • Report No.: UNR 1330-112-1652
  • Grant Number: FG08-90ER14160
  • DOI: 10.2172/2576 | External Link
  • Office of Scientific & Technical Information Report Number: 2576
  • Archival Resource Key: ark:/67531/metadc668442

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  • December 1, 1998

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 11, 2017, 2:48 p.m.

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Winkler, P. Screening Resonances In Plasmas, report, December 1, 1998; Las Vegas, Nevada. (digital.library.unt.edu/ark:/67531/metadc668442/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.