ABSTRACT
This chapter discusses the interaction between electromagnetic radiation and plasma, which is a lively area of investigation. It explains radiation emanated from a plasma or charged particle beam, treating the radiation from beams and runaway electrons and the free electron laser. The chapter considers laser plasma acceleration processes, in which electromagnetic radiation such as lasers accelerates particles to high energies. The ion cyclotron resonance heating takes place when the compressional Alfven wave resonates with the ion cyclotron frequency. An unmagnetized plasma supports only the electrostatic two-stream instability, while magnetized plasma can have the electromagnetic two-stream instability which can emit radiation. The electromagnetic interaction of a beam with magnetized plasma can give rise to radiation emanating from the plasma. Sources of tunable coherent high power electromagnetic radiation are highly desirable of the application in many areas. Shining radiation on a plasma is expected to excite various oscillations and to heat a plasma.
