Results 1 to 10 of about 271,711 (297)
Some of the next articles are maybe not open access.
Gas Ionization by Runaway Electrons
Russian Physics Journal, 2002A description of the development of a runaway electron avalanche in helium is presented. It is demonstrated that the ionization coefficient α approaches a steady-state value αst even in a very strong field. The dependences of α and αst and also of the transient length of αst on the field strength in the transient region are obtained. The experimentally
openaire +1 more source
A contribution to the problem of runaway electrons
Annals of Nuclear Energy, 1996Abstract After giving a short sketch of the status of the field we treat two models of runaway in some detail. One is a Fokker-Planck equation, the other a kinetic equation with compact kernel. Both are 1-d models; both deal with the marginal case of ( 1 v ) relaxation of diffusion coefficient or reaction-rate.
Christianson, Kent, Corngold, Noel
openaire +2 more sources
Physical Review A, 1981
The phenomenon of cross-field runaway electrons can occur in cases where large dc electric fields with steep gradients exist perpendicular to a magnetic field. A derivation of the circumstances which permit this condition to exist is presented.
openaire +1 more source
The phenomenon of cross-field runaway electrons can occur in cases where large dc electric fields with steep gradients exist perpendicular to a magnetic field. A derivation of the circumstances which permit this condition to exist is presented.
openaire +1 more source
Runaway electrons in toroidal discharges
Nuclear Fusion, 1979Experimental and theoretical studies of runaway electrons in toroidal devices are reviewed here, with particular reference to tokamaks. The complex phenomenology of runaway effects, which have been the subject of research for the past twenty years, is organized within the framework of a number of physical models.
H. Knoepfel, D.A. Spong
openaire +1 more source
Theory of the Runaway Electron Tail
Physical Review Letters, 1977The steady-state electron distribution function of a current-carrying magnetized plasma is determined self-consistenly with the enhanced $\ensuremath{\omega}=\frac{{\ensuremath{\omega}}_{\mathrm{pe}}{k}_{\ensuremath{\parallel}}}{k}$ plasma wave spectrum it generates. Consequences include enhanced fluctuations at $\ensuremath{\omega}\ensuremath{\simeq}{\
Kim Molvig +2 more
openaire +1 more source
Diffusion of runaway electrons in a tokamak
Nuclear Fusion, 1978It is shown that the presence of a sufficient number of accelerated electrons in a plasma leads to anomalous diffusion of the electrons across the magnetic field. The diffusion of the particles is associated with the presence of waves driven unstable by the runaway electrons via anomalous and Doppler effect.
V.V. Parail, O.P. Pogutse
openaire +1 more source
A recursive representation for runaway electrons
Journal of Physics A: Mathematical and General, 1982Among the analytic studies on runaway phenomena the most sophisticated approach to solving the Fokker-Planck equation is to divide the momentum space into five distinct regions with appropriate matching between them: various expansions of the distribution function are valid in different regions. A pair of recursive relations is established to solve the
openaire +1 more source
Runaway electron control in FTU
2014Experimental results on the control of the runaway electron (RE) horizontal position and the RE current ramp-down in FTU are presented. It is shown how the cold plasma, whose position can be detected by the scanning interferometer sensor, closely envelopes the RE beam.
D. Carnevale (1 +19 more
openaire +3 more sources
Runaway Electron Control in FTU
2015Experimental results on the control of the runaway electron (RE) horizontal position and the RE current ramp-down in FTU are presented. It is shown how the cold plasma, whose position can be detected by the scanning interferometer sensor, closely envelopes the RE beam.
D. Carnevale (1 +15 more
openaire +1 more source
Analysing the distribution of runaway electrons in the EAST tokamak based on SOFT
Fusion Engineering and Design, 2021Ruijie Zhou, Jiayuan Zhang, Meiwen Chen
exaly