Frequency Spectrum of the Radiation Flow in the Frequency Range 0.1–0.6 THZ Generated at the GOL–PET Facility Under Various Conditions

• Published in: Radiophysics and quantum electronics Vol. 65; no. 5-6; pp. 313 - 322
• Main Authors: Samtsov, D. A., Arzhannikov, A. V., Sinitsky, S. L., S.Popov, S., Kalinin, P. V., Sandalov, E. S., G.Atlukhanov, M., Morozov, O. P., Kuklin, K. N., Makarov, M. A., Rovenskikh, A. F, Stepanov, V. D.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2022; Springer; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Astroparticles; Electric waves; Electromagnetic radiation; Electromagnetic waves; Electromagnetism; Frequency ranges; Frequency spectrum; Hadrons; Heavy Ions; Lasers; Magnetic fields; Mathematical and Computational Physics; Nuclear Physics; Observations and Techniques; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Plasma oscillations; Plasma waves; Quantum Optics; Radiation; Relativistic electron beams; Terahertz frequencies; Theoretical
• ISSN: 0033-8443; 1573-9120
• DOI: 10.1007/s11141-023-10215-5

Research on one of the methods for generation of high-power radiation flows in the subterahertz/terahertz frequency range using the GOL–PET facility is underway at the G. I.Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences (BINP SB RAS). This method consists in using the mechanisms of conversion of the plasma waves excited by a relativistic electron beam (REB) into an electromagnetic radiation flow. In the course of research, a number of mechanisms by which plasma oscillations are converted into radiation were revealed, and a power level of 10 MW was experimentally achieved in a directed submillimeter radiation flow with a duration of a few microseconds. This paper is devoted to the study of radiation generation as a function of the degree of compression of the REB cross section. The compression degree was varied in the experiments by varying the magnetic field distribution along the axis of the facility. The magnetic field was varied uniformly along the entire facility axis. In addition, the configuration with an increased ratio of fields in the accelerator diode and in the plasma section of the facility was considered. As a result of the experiments, it was shown that a decrease in the strength of the guiding magnetic field by a factor of 1.6 does not lead to a change in the radiation generation mechanism.