Restraining of Runaway Electrons in High-Temperature Plasmas

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Abstract
A theoretical model is proposed in relation with the observed lack of electron runaway processes in magnetically confined, high-electron-temperature plasmas on which electric fields of the order of or larger than the critical runaway field have been applied. The excitation of standing modes locked in with the periodic inhomogeneities of the magnetic field is considered in order to provide, via mode-particle resonance processes, a momentum exchange between the (accelerated) current-carrying electrons and the magnetic field itself.