Nonlinear dynamics of beam–plasma instability in a finite magnetic field
- Авторлар: Bogdankevich I.1,2, Goncharov P.3, Gusein-zade N.1,2, Ignatov A.1,2
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Мекемелер:
- Prokhorov General Physics Institute
- Pirogov Russian National Research Medical University
- Moscow Technological University (MIREA)
- Шығарылым: Том 43, № 6 (2017)
- Беттер: 648-658
- Бөлім: Beams in Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/186097
- DOI: https://doi.org/10.1134/S1063780X17060046
- ID: 186097
Дәйексөз келтіру
Аннотация
The nonlinear dynamics of beam–plasma instability in a finite magnetic field is investigated numerically. In particular, it is shown that decay instability can develop. Special attention is paid to the influence of the beam−plasma coupling factor on the spectral characteristics of a plasma relativistic microwave accelerator (PRMA) at different values of the magnetic field. It is shown that two qualitatively different physical regimes take place at two values of the external magnetic field: B0 = 4.5 kG (Ω ~ ωBp) and 20 kG (ΩB ≫ ωp). For B0 = 4.5 kG, close to the actual experimental value, there exists an optimal value of the gap length between the relativistic electron beam and the plasma (and, accordingly, an optimal value of the coupling factor) at which the PRMA output power increases appreciably, while the noise level decreases.
Авторлар туралы
I. Bogdankevich
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Email: ngus@mail.ru
Ресей, Moscow, 119991; Moscow, 117997
P. Goncharov
Moscow Technological University (MIREA)
Email: ngus@mail.ru
Ресей, Moscow, 119454
N. Gusein-zade
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Хат алмасуға жауапты Автор.
Email: ngus@mail.ru
Ресей, Moscow, 119991; Moscow, 117997
A. Ignatov
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Email: ngus@mail.ru
Ресей, Moscow, 119991; Moscow, 117997