Some peculiarities of the realization of free electron lasers without inversion

Аннотация

The possibility of creating free electron lasers without inversion (FELWI) is shown to have threshold character with respect to the intensity of wave to be amplified. A description of threshold conditions is given in the single-particle approach. It is shown that as the observation threshold of amplification without inversion is rather high, and the possibility of experimental realization of FELWI may be essentially impeded