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Physics of Plasmas / Volume 12 / Issue 12 / ARTICLES / Low-Temperature Plasmas, Plasma Applications, Plasma Sources, Sheaths

Phys. Plasmas 12, 123501 (2005); http://dx.doi.org/10.1063/1.2140683 (7 pages)

Ultracold neutral plasma expansion in two dimensions

E. A. Cummings, J. E. Daily, D. S. Durfee, and S. D. Bergeson

Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602

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(Received 14 September 2005; accepted 3 November 2005; published online 12 December 2005)

An isothermal model of ultracold neutral plasma expansion is extended to systems without spherical symmetry. It is used to interpret new fluorescence measurements on ultracold neutral calcium plasmas. For a self-similar expansion, the fluid equations are solved both analytically and numerically. The density and velocity solutions are used to predict fluorescence signals induced by a laser beam weakly focused into the plasma. Despite the simplicity of the model, predicted fluorescence signals reproduce major features of the experimental data.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. ISOTHERMAL FLUID MODEL
  3. FLUORESCENCE SIGNAL MODEL
  4. ULTRACOLD CALCIUM PLASMAS
  5. COMPARING THE MODEL TO THE DATA
  6. CONCLUSION

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KEYWORDS and PACS

Keywords

calcium, fluorescence, plasma flow, plasma diagnostics, fractals, plasma density, plasma light propagation, numerical analysis

PACS

  • 52.30.-q

    Plasma dynamics and flow

  • 52.70.Kz

    Optical (ultraviolet, visible, infrared) measurements

  • 52.25.Ya

    Neutrals in plasmas

  • 52.38.Dx

    Laser light absorption in plasmas (collisional, parametric, etc.)

  • 02.60.Cb

    Numerical simulation; solution of equations

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2140683

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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