Theoretical and experimental studies of W-band relativistic surface-wave oscillator of planar geometry
| Autor: | V. Yu. Zaslavsky, A. V. Palitsin, Yu. V. Rodin, A. M. Malkin, A. S. Sergeev, A. E. Fedotov, M. B. Goykhman, A. V. Gromov, Yu. M. Guznov, A. N. Panin, D. R. Gulovskii, N. Yu. Peskov, N. S. Ginzburg |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 30 |
| ISSN: | 1089-7674 1070-664X |
| Popis: | This paper presents the results of theoretical and experimental studies of a surface-wave oscillator (SWO) of planar geometry excited by a ribbon high-current relativistic electron beam. Within the framework of the quasi-optical approach and direct three-dimensional particle-in-cell modeling, we demonstrate the advantages of open transverse edged configuration against the closed one for effective mode selection at a fairly large oversize factor. In the experiments carried out on the basis of the SINUKI accelerator (Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, 1 kA/650 keV/17 ns), we form a magnetically guided ribbon electron beam with a cross-section of 0.3 × 20 mm2, which moves parallel to a slow-wave structure with a period of 1.75 mm. A planar W-band SWO both of open and closed edged configuration has been experimentally tested. In full agreement with modeling, the open configuration exhibits much more stable operation, where at a frequency of 75 GHz, we observe pulse generation with duration of about 7 ns. The output power measured by the calorimetric method reaches 25 MW. |
| Databáze: | OpenAIRE |
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