Trapping and confinement of fast electrons in a magnetic pit for a scheme of two-stage heating of plasma by electron beam in a solenoid

A numerical simulation of decelerating, scattering, and trapping fast elect rons by plasma in a magnetic trap is reported. Fast non-thermal electrons a re generated via the interaction of the relativistic electron beam with the plasma. Their energy significantly exceeds the thermal energy of plasma pa rticles. For real experimental conditions where the mean free path of elect rons is larger than the length of a local magnetic pit, the kinetic equatio n for distribution function of electrons is numerically solved. The effect of electron scattering and trapping into the pit is calculated.