Generation of Langmuir Waves from Alfvén Waves by the Plasma Maser in Pair Plasmas

Abstract

Using a two-dimensional electromagnetic and relativistic particle code, we show that high-frequency Langmuir waves can be generated by the plasma maser mechanism fromlow-frequency Alfvén waves excited by a temperature anisotropy.It is confirmed by the simulation that the plasma maser mechanism does not require an electron (or positron)beam component for the growth of high-frequency Langmuir waves.