Exact numerical solution of the dispersion relation in relativistic backward-wave oscillator and relativistic travelling-wave tube filled with plasma

Autor:	Sajad Bayat, Saeed Babanejad, Seyed Mohammad Hasheminejad, Seyed Milad Vahabi
Rok vydání:	2014
Předmět:	Physics Plasma Condensed Matter Physics Traveling-wave tube law.invention Nuclear Energy and Engineering Beamline law Quantum electrodynamics Dispersion relation Cathode ray Backward-wave oscillator Growth rate Atomic physics Beam (structure)
Zdroj:	Plasma Physics and Controlled Fusion. 56:125009
ISSN:	1361-6587 0741-3335
Popis:	In this paper, the dispersion relation of the relativistic travelling-wave tube (RTWT) and relativistic backward-wave oscillator (RBWO) filled with plasma is obtained in the presence of an annular electron beam and solved by an exact numerical solution. The interaction of the beam with the waveguide modes is clearly identified and beam line splitting into the slow and fast waves is observed. In addition, the growth rates of each structure are investigated. The results show that the effect of plasma on the temporal growth rate of the TM01 mode in the RBWO is negligible and the higher modes are not affected. Conversely, the spatial growth rate in the RTWT increases significantly with the plasma density.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::69d2f0d21db5b7a15494c943c501b789 https://doi.org/10.1088/0741-3335/56/12/125009 Zobrazit plný text záznamu