抄録
Using a two-dimensional electromagnetic and relativistic particle code, we show that electromagnetic waves can be emittedfrom Langmuir waves generated by an electron beam instability in pairplasmas. It is confirmed that the presence of a magnetic field isessential for the emission mechanism of the electromagnetic waves. The lineargrowth rate of the generation of electromagnetic waves is studied by manyparameter runs changing theelectron beam density, the electron beam velocity and the intensity ofmagnetic field. The plasma maser process is the most possible emissionmechanism of the electromagnetic waves.
