The monograph represents the first gradual introduction in the world literature into the physics of coherent radiation processes in plasma - a new branch of physics formed at the interface of quantum electronics and plasma physics. This branch of physics focuses on achievements in the physics of atomic and ionic beams and is associated with the development and extensive application of now laser-plasma technologies in collective laser ion accelerators, micro- and nanoelectronics and nonlinear-optical information systems. Special features of coherent radiation processes in plasma are determined by strong electromagnetic interaction of charged particles amongst themselves and with external electric and magnetic fields.