P. Helander L.-G. Eriksson R. J. Akers C. Byrom C.G. Gimblett M. R. Tournianski
Spontaneous acceleration of ions to suprathermal energies is observed during magnetic reconnection in the Mega-Ampere Spherical Tokamak (MAST). A high-energy tail is observed in the iondistribution function following each internal reconnection event in Ohmic discharges. This phenomenon is explained in terms of runaway ion acceleration in the electr…
PublishedM. J. Mantsinen L.C. Ingesson T. Johnson V.G. Kiptily M.-L. Mayoral S. E. Sharapov B. Alper L. Bertalot S. Conroy L.-G. Eriksson T. Hellsten J.-M. Noterdaeme S. Popovichev E. Righi A. A. Tuccillo
Experiments on the JET tokamak show that the wave-induced pinch in the presence of toroidally asymmetric waves can provide a tool for controlling the profile of ion-cyclotron-resonant 3 He ions. Direct evidence for the wave-induced pinch has been obtained from the measured -ray emission profiles. Concurrent differences in the excitation of Alfve?n …
PublishedF. Andersson P. Helander L.-G. Eriksson
Relativistic electrons emit synchrotron radiation due to their gyro- and guiding-center motions in a curved magnetic field. In this article, the kinetic theory of relativistic electron beams is developed to account for radiation reaction by including the Abraham–Lorentz reaction force in the kinetic equation. As an application of this theory, the…
PublishedP. Helander L.-G. Eriksson F. Andersson
The kinetic theory of runaway electron avalanches caused by close Coulomb collisions is extended to account for radial diffusion. This is found to slow down the growth of avalanches. An approximate analytical formula for the growth rate is derived and is verified by a three-dimensional Monte Carlo code constructed for this purpose. As the poloidal …
Published