K. Appert

Continuous spectra of a cylindrical magnetohydrodynamic equilibrium

It is shown that, for a cylindrical equilibrium of a perfectly conducting plasma, the magnetohydrodynamic spectrum contains at most two continua.

Spectrum of low-frequency, nonaxisymmetric oscillations in a cold, current-carrying plasma column

Reference CRPP-ARTICLE-1983-008View record in Web of Science Record created on 2008-04-16, modified on 2017-05-12

Dynamics of Coupled Solitons

Keywords: LRP 125 Reference CRPP-REPORT-1977-001 Record created on 2008-04-18, modified on 2017-05-12

Cerenkov and anomalous Doppler effects in the relaxation of an electron beam

The interplay between the Cerenkov and anomalous Doppler interactions in the relaxation of a warm electron beam is investigated by numerical means. The most important feature in the interplay is found to be a nonelastic isotropization. A simple semianalytical model which allows one to estimate various quantities relevant to the relaxation process is also presented.

Quasisteady turbulence driven by runaway electrons

The evolution of the turbulence driven by runaway electrons has been followed by means of a computer code based on the quasilinear equations. The evolution is not characterized by periodic relaxations as claimed in previous works but ends in a quasisteady turbulent, yet very persistent state, accessible from different initial conditions. This discrepancy is clarified as being due to the excessive stiffness of the moment equations used to demonstrate the relaxations. Moreover, a theory is developed to interpret the quasisteady state found.

Adiabatic Interaction of Coherent Waves with Weak Turbulence in Plasmas

Reference CRPP-ARTICLE-1980-002doi:10.1063/1.863204View record in Web of Science Record created on 2008-04-16, modified on 2017-05-12

Quasi‐linear theory of the current‐driven ion‐acoustic turbulence in a weakly ionized plasma

Saturation of the current‐driven ion‐acoustic instability in a weakly ionized plasma is investigated within the context of a quasi‐linear model that includes the effects of collisions. The turbulent wave energy is calculated under the assumption that the waves are excited within the cone of a small angle. The results obtained compare favorably with the recent experimental observations of Ilic.

Resonant absorption of Alfvén waves in Fat Tori with circular cross-section

Keywords: LRP 170 Reference CRPP-REPORT-1980-001 Record created on 2008-04-18, modified on 2017-05-12

Etude numérique de l"absorption résonante d"une onde d"Alfvén en géométrie cylindrique

Reference CRPP-ARTICLE-1979-020doi:10.1007/BF01590694View record in Web of Science Record created on 2008-04-16, modified on 2017-05-12