Investigation of the third harmonic generation in a high-current relativistic Ka-band gyrotron

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Дәйексөз келтіру

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Аннотация

Theoretical and experimental investigations of radiation generation in the frequency multiplication mode at the third harmonic in a high-current Ka-band gyrotron have been carried out. Within the framework of three-dimensional PIC-simulation, it is shown that the nonlinear transformation coefficient in the W-band can reach values of 0.5%. Experimental data on registration of radiation in this range are presented.

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Авторлар туралы

E. Abubakirov

Federal Research Center Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences

Email: leontiev@ipfran.ru
Ресей, Nizhny Novgorod

A. Denisenko

Federal Research Center Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences

Email: leontiev@ipfran.ru
Ресей, Nizhny Novgorod

A. Leontyev

Federal Research Center Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences; Lobachevsky National Research Nizhny Novgorod State University

Хат алмасуға жауапты Автор.
Email: leontiev@ipfran.ru
Ресей, Nizhny Novgorod; Nizhny Novgorod

K. Mineev

Federal Research Center Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences; Lobachevsky National Research Nizhny Novgorod State University

Email: leontiev@ipfran.ru
Ресей, Nizhny Novgorod; Nizhny Novgorod

R. Rozental

Federal Research Center Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences; Lobachevsky National Research Nizhny Novgorod State University

Email: leontiev@ipfran.ru
Ресей, Nizhny Novgorod; Nizhny Novgorod

Әдебиет тізімі

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2. Fig. 1. Geometry of the interaction space in three-dimensional modeling using the large particle method, instantaneous position of macroparticles and their energy distribution (a). Calculated dependence of the power at the fundamental harmonic (mode TE–4.2) and at the third harmonic of the gyrofrequency (mode TM–12.4) on the magnetic field strength (b).

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3. Fig. 2. External appearance of the experimental model of a relativistic high-current gyrotron.

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4. Fig. 3. Scheme for measuring the parameters of gyrotron radiation in the Ka- and W-bands. 1 – gyrotron output window, 2 – waveguides, 3 – calorimeter; 4, 5 – directional couplers; 6, 7, 8, 9 – attenuators; 10, 12 – microwave detectors; 11, 13 – mixers; 14, 15 – heterodynes; 16 – oscilloscope.

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5. Fig. 4. Experimentally measured pulse shapes at the fundamental (a) and third (c) harmonics of the gyrofrequency and the corresponding spectra (b) and (d).

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