1987
DOI: 10.1088/0029-5515/27/3/010
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Kinetic theory of anomalous transport processes in tokamaks

Abstract: Investigation of behavior of fast electrons in toroidal discharges was performed. The kinetic equation, describing evolution of fast particle distribution was derived and analyzed. Semi -analytical solution of the kinetic equation was obtained into suprathermal energy region. External electric field, anomalous transport, nonuniformity of mean magnetic field and collisions was shown to be an important factors, affecting distribution function. The role of ambipolar electric field was established and identified a… Show more

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Cited by 18 publications
(7 citation statements)
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“…One such device is a reversed field pinch (RFP) where, according to experimental data, a considerable part of the energy is transported by fast particles [19-211. To estimate the energy confinement efficiency in RFP type devices, it is necessary to determine the distribution function of fast particles in the discharge. Furthermore, fast particles carry information on the processes proceeding inside the discharge and so the investigation of their distribution may be used to diagnose the state of the plasma [19, 221. In [22], the authors formulated a consistent kinetic theory of anomalous transport processes in a turbulized plasma and derived the kinetic equation describing the averaged particle distribution function under these conditions. The relaxed state of a turbulent plasma and the anomalous transport processes under RFP conditions were analysed in Refs [23, 241.…”
Section: -Lcvementioning
confidence: 99%
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“…One such device is a reversed field pinch (RFP) where, according to experimental data, a considerable part of the energy is transported by fast particles [19-211. To estimate the energy confinement efficiency in RFP type devices, it is necessary to determine the distribution function of fast particles in the discharge. Furthermore, fast particles carry information on the processes proceeding inside the discharge and so the investigation of their distribution may be used to diagnose the state of the plasma [19, 221. In [22], the authors formulated a consistent kinetic theory of anomalous transport processes in a turbulized plasma and derived the kinetic equation describing the averaged particle distribution function under these conditions. The relaxed state of a turbulent plasma and the anomalous transport processes under RFP conditions were analysed in Refs [23, 241.…”
Section: -Lcvementioning
confidence: 99%
“…The amplitude of fluctuations will be assumed small compared to the mean field Bo, Ibj << IBol. The basic quantities characterizing the fluctuations (the correlation length and the correlation time) will be thought of as large compared to the Larmor radius of the particles and their inverse gyrofrequencies as in [22]. Within such a statement of the problem and disregarding toroidality effects, the authors derived the general kinetic equation for the particle distribution function f ( r , U , b) averaged over the ensemble of fluctuations.…”
Section: Kinetic Equation For Superthermal Electronsmentioning
confidence: 99%
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“…Наряду с пространственным переносом может происходить ускорение частиц, поэтому кинетиче ское рассмотрение должно описать не только распространение частиц в пространстве, но и их распределение по энергиям. Формирование спект ров нетепловых частиц в плазме астрофизических объектов особенно важно для проблемы происхож дения космических лучей [6], но это явление играет определенную роль также в лазерной плазме [7] и в токамаках [8].…”
Section: введение формулировка проблемыunclassified
“…In a recent work, hard x-ray (HXR) intensity spectra were proved to be a good tool for measuring magnetic turbulence characteristics (Rodríguez-Rodrigo 1995). HXR features have been explained in terms of runaway electron kinetic effects induced by magnetic turbulence (Gurevich et al 1987). Spectra whose logarithms present roughly two slopes separated by a flat area in the energy were observed.…”
Section: Introductionmentioning
confidence: 99%