Source of submm wave flux with multimegawatt pulse power based on relaxation of a relativistic electron beam in a plasma column

One of the possible approaches to generate high power (up to 100 MW) submm radiation flux is to apply mechanism of the plasma wave conversion into electromagnetic (EM) ones at intense beam-plasma interaction. Given report is devoted to study of such transformation process in case of generation radiation fluxes with multimegawatt power in the frequency range 0.1-0.6 THz. Experimental study on this approach is carried out at the GOL-PET facility when a relativistic electron beam (REB) with parameters 0.6MeV/10kA/6us is propagated in a plasma column. The plasma column with the density $\mathrm{n}\sim 10^{15}\text{cm}^{-3}$ is created and confined in a multi-mirror magnetic trap (B = 4 T). In recent experiments, the energy content and power of a submm radiation flux of microsecond pulse duration achieved 7 J and 10 MW, respectively. Results of the spectral composition measurements of the flux generated by this radiation source will be presented and discussed in our report.