Details

Autor(en) / Beteiligte

• Arzhannikov, A. V.
• Sinitsky, S. L.
• Samtsov, D. A.
• Timofeev, I. V.
• Sandalov, E. S.
• Popov, S. S.
• Atlukhanov, M. G.
• Makarov, M. A.
• Kalinin, P. V.
• Kuklin, K. N.
• Rovenskikh, A. F.
• Stepanov, V. D.

Titel

The Frequency Spectrum and Energy Content in a Pulse Flux of Terahertz Radiation Generated by a Relativistic Electron Beam in a Plasma Column with Different Density Distributions

Ist Teil von

• Plasma physics reports, 2024-03, Vol.50 (3), p.331-341

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This paper reports on the generation of a directed flux of electromagnetic radiation with an energy content of 10 J in the frequency range of 0.2–0.3 THz at a microsecond pulse duration in a beam–plasma system. The flux is generated when a relativistic electron beam (REB) pumps electron plasma waves in a magnetized plasma column. In the described experiments, this fundamentally new approach to generate terahertz radiation was carried out at the GOL-PET facility in the conditions of varying the beam current density and the plasma density in the appropriate ranges of 1–2 kA/cm 2 and 10 14 –10 15 cm –3 . From the comparison of the flux energy spectrum measured experimentally in the frequency range 0.15–0.45 THz with the calculated one obtained using the previously proposed model of radiation generation in a beam–plasma system it was shown that this process occurs through resonant pumping by REB of precisely the branch of upper-hybrid plasma waves. Mastering this new method to generate terahertz radiation opens the prospect of its use to obtain multi-megawatt radiation fluxes in the frequency range up to 1 terahertz and higher. For such a development approach the most promising beam for pumping plasma oscillations seems to be a kiloampere REB generated in a linear induction accelerator.