Open AccessThe instability of an electron beam with a finite radius in a boundless plasma
Author(s) -
G. V. Lizunov,
A. S. Volokitin,
D. B. Skidanov
Publication year - 1996
Publication title -
annales geophysicae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.522
H-Index - 93
eISSN - 1432-0576
pISSN - 0992-7689
DOI - 10.1007/s00585-996-0367-1
Subject(s) - instability , physics , radius , plasma , electron , beam (structure) , cathode ray , computational physics , two stream instability , space (punctuation) , quantum electrodynamics , atomic physics , mechanics , quantum mechanics , optics , computer security , computer science , linguistics , philosophy
Within the framework of a linear theory, theinstability of an electron beam with a finite radius in a cold magnetisedboundless plasma is considered. It is shown that a finite beam dimensioninfluences the generation of quasi-potential waves in two aspects: theperpendicular wave number is quantised so that the frequencies of the waves aresubjected to strong selection; a new kind of instability appears due to waveenergy losses by emission into surrounding space. Growth rate dependence of wavenumbers and frequencies is investigated for typical parameters of experimentswith electron beams in space