Nonadiabatic phenomena during magnetic trap confinement and their influence on maximum x-ray energy from electron-cyclotron-resonance-heated plasmas.
Nonadiabatic effects during the confinement of energetic electrons with a gyroradius comparable with the magnetic field scale have been studied with a phase section technique. The appearance of a hot electron component is a characteristic feature of electron-cyclotron-resonance-heated plasma production in magnetic mirrors. A criterion for the absence of stable trajectories and the transition to strong stochastic motion for any initial condition is proposed and confirmed by simulations. Satisfactory agreement with the experimental x-ray spectra is obtained.
Serebrennikov
K S
KS
Laboratoire de Physique des Milieux Ionisés, UMR 7643 du CNRS, Ecole Polytechnique, 91128 Palaiseau, France.
Gaudin
C
C
Buzzi
J M
JM
Bruneteau
J
J
Rouille
C
C