Journal of Fusion Energy

, Volume 13, Issue 4, pp 275–280 | Cite as

The Rayleigh-Taylor instability in the spherical pinch

  • H. B. Chen
  • B. Hilko
  • E. Panarella
Article

Abstract

The spherical pinch (SP) concept is an outgrowth of the inertial confinement model (ICF). Unlike the ICF, where instabilities, especially the Rayleigh-Taylor instability, have been studied extensively, the instability study of the spherical pinch has just begun. The Rayleigh-Taylor instability is investigated for the first time in the SP in the present work. By using the simple condition for the Rayleigh-Taylor instability ∇p·∇ρ<0 (density and pressure gradients have opposite direction), we have qualitatively identified the regions for development of instabilities in the SP. It is found that the explosion phase (central discharge) is stable and instabilities take place in the imploding phase. However, the growth rate for the instability is not in exponential form, and the appearance of the Rayleigh-Taylor instability does not prevent the main shock wave from converging to the center of the sphere.

Key Words

Spherical pinch inertial confinement fusion Rayleigh-Taylor instability 

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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • H. B. Chen
    • 1
  • B. Hilko
    • 1
  • E. Panarella
    • 2
  1. 1.Advanced Laser and Fusion Technology, Inc.HullCanada
  2. 2.Department of Electrical and Computer EngineeringUniversity of TennesseeKnoxville

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