Plasma heating in a solenoid by a relativistic electron beam

The problem of using powerful relativistic electron beams for a fast heating of plasma in open solenoidal systems has arisen practically immediately after creation of the generators of such beams. As the deceleration length of relativistic electrons due to Coulomb collisions even in a very dense plasma is too large, all the prospects of effective plasma heating with the beams are associated with the collective interaction of a high-current relativistic electron beam with a plasma. The development of the small-scale two-stream instability can be one of the mechanisms for effective deceleration of the relativistic beam in the plasma.