TITLE

Dynamic stabilization of Rayleigh-Taylor instability in an ablation front

AUTHOR(S)
Piriz, A. R.; Di Lucchio, L.; Rodriguez Prieto, G.
PUB. DATE
January 2011
SOURCE
Physics of Plasmas;Jan2011, Vol. 18 Issue 1, p012702
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Dynamic stabilization of Rayleigh-Taylor instability in an ablation front is studied by considering a modulation in the acceleration that consists of sequences of Dirac deltas. This allows obtaining explicit analytical expressions for the instability growth rate as well as for the boundaries of the stability region. As a general rule, it is found that it is possible to stabilize all wave numbers above a certain minimum value km, but the requirements in the modulation amplitude and frequency become more exigent with smaller km. The essential role of compressibility is phenomenologically addressed in order to find the constraint it imposes on the stability region. The results for some different wave forms of the acceleration modulation are also presented.
ACCESSION #
57679444

 

Related Articles

  • Self-consistent stability analysis of ablation fronts with small Froude numbers. Goncharov, V. N.; Betti, R.; McCrory, R. L.; Verdon, C. P. // Physics of Plasmas;Dec96, Vol. 3 Issue 12, p4665 

    The linear growth rate of the Rayleigh–Taylor instability is calculated for accelerated ablation fronts with small Froude numbers (Fr<1). The derivation is carried out self-consistently by including the effects of finite thermal conductivity (κ∼Tν) and density gradient scale...

  • General method for reducing the two-body Dirac equation. Galeão, A. P.; Ferreira, P. Leal // Journal of Mathematical Physics;Jul92, Vol. 33 Issue 7, p2618 

    A semirelativistic two-body Dirac equation with an enlarged set of phenomenological potentials, including Breit-type terms, is investigated for the general case of unequal masses. Solutions corresponding to definite total angular momentum and parity are shown to fall into two classes, each one...

  • Observation of the Taylor instability in a dusty plasma. Pacha, K. A.; Heinrich, J. R.; Kim, S.-H.; Merlino, R. L. // Physics of Plasmas;Jan2012, Vol. 19 Issue 1, p014501 

    Observations of the Taylor instability in a laboratory dusty plasma are presented. The dust cloud, formed in a dc argon glow-discharge plasma, is stratified into regions of high and low dust densities. The instability was triggered by a spontaneous intrusion of the low density dust fluid into...

  • A phenomenological model on the kink mode threshold varying with the inclination of sheath boundary. Sun, X.; Intrator, T. P.; Liu, M.; Sears, J.; Weber, T. // Physics of Plasmas;Nov2013, Vol. 20 Issue 11, p112106 

    In nature and many laboratory plasmas, a magnetic flux tube threaded by current or a flux rope has a footpoint at a boundary. The current driven kink mode is one of the fundamental ideal magnetohydrodynamic instabilities in plasmas. It has an instability threshold that has been found to strongly...

  • A phenomenological approach to the equation of state of a unitary Fermi gas. MURTHY, M; BRACK, M; BHADURI, R // Pramana: Journal of Physics;Jun2014, Vol. 82 Issue 6, p985 

    We propose a phenomenological approach for the equation of state of a unitary Fermi gas. The universal equation of state is parametrized in terms of Fermi-Dirac integrals. This reproduces the experimental data over the accessible range of fugacity and normalized temperature, but cannot describe...

  • Short-wavelength and three-dimensional instability evolution in National Ignition Facility ignition capsule designs. Clark, D. S.; Haan, S. W.; Cook, A. W.; Edwards, M. J.; Hammel, B. A.; Koning, J. M.; Marinak, M. M. // Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p082701 

    Ignition capsule designs for the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 443, 2841 (2004)] have continued to evolve in light of improved physical data inputs, improving simulation techniques, and, most recently, experimental data from a growing...

  • Vibration waveform effects on dynamic stabilization of ablative Rayleigh-Taylor instability. Piriz, A. R.; Lucchio, L. Di; Rodriguez Prieto, G.; Tahir, N. A. // Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p082705 

    An analysis of dynamic stabilization of Rayleigh-Taylor instability in an ablation front is performed by considering a general square wave for modulating the vertical acceleration of the front. Such a kind of modulation allows for clarifying the role of thermal conduction in the mechanism of...

  • Linear stability of static equilibrium states in the Hall-magnetohydrodynamics model. Hameiri, Eliezer; Torasso, R. // Physics of Plasmas;Nov2004, Vol. 11 Issue 11, p4934 

    The magnetohydrodynamic (MHD) plasma model, as modified by the Hall effect, is given a Hamiltonian formulation and its stability properties are studied. It is found that, in most cases, a stable MHD plasma remains stable after the addition of the Hall effect. The most notable exceptions are when...

  • Feedback-assisted extension of the tokamak operating space to low safety factor. Hanson, J. M.; Bialek, J. M.; Baruzzo, M.; Bolzonella, T.; Hyatt, A. W.; Jackson, G. L.; King, J.; Haye, R. J. La; Lanctot, M. J.; Marrelli, L.; Martin, P.; Navratil, G. A.; Okabayashi, M.; Olofsson, K. E. J.; Paz-Soldan, C.; Piovesan, P.; Piron, C.; Piron, L.; Shiraki, D.; Strait, E. J. // Physics of Plasmas;Jul2014, Vol. 21 Issue 7, p1 

    Recent DIII-D and RFX-mod experiments have demonstrated stable tokamak operation at very low values of the edge safety factor q(a) near and below 2. The onset of n=1 resistive wall mode (RWM) kink instabilities leads to a disruptive stability limit, encountered at q(a)=2 (limiter plasmas) and...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics