INTERACTION RELATION BETWEEN ELECTRON BEAM AND WAVES IN A CARM
回旋自谐振脉塞中束波互作用关系

From phase equation in an electron cyclotron autoresonance maser (CA-RM) amplifier the interaction between beam and electromagnetic waves is investigated with help of four-dimesional Maxwell equations, electromangetic-field tensor, energy-momentum tensor. The new phase equation is transformed by Lorentz transformation. Being non-longitudinal electro-field component, presence of longitudinal energy change between longitudinal moving beam and TE(Hmax) mode is jutified in theory.