Behaviour and stability of Trivelpiece-Gould modes in non-neutral plasma containing small density fraction of background gas ions

Journal Article · Tue Mar 19 04:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4796065· OSTI ID:22113543

Yeliseyev, Y. N. ^[1]

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1. Institute of Plasma Physics, National Science Center Kharkov Institute of Physics and Technology, Akademicheskaya St., 1, 61108 Kharkov (Ukraine)

It is shown that the frequencies of Trivelpiece-Gould (TG) modes in non-neutral plasma can get into the low-frequency range due to the Doppler shift caused by plasma rotation in crossed fields. TG modes interact with the ion modes that leads to plasma instability. In paper the frequency spectrum of 'cold' electron plasma completely filling a waveguide and containing small density fraction of ions of background gas is determined numerically. For ions the kinetic description is used. Oscillations having azimuthal number m= 2 are considered. In this case both low- and upper-hybrid TG modes get into the low-frequency range. The spectrum consists of families of 'modified' ion cyclotron (MIC) modes and electron TG modes with the frequencies equal to hybrid frequencies with the Doppler shift. The growth rates of upper-hybrid modes are much faster than the growth rates of low-hybrid and MIC modes.

• OSTI ID: 22113543
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1521; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CROSSED FIELDS
DOPPLER EFFECT
ELECTRONS
ION CYCLOTRON-RESONANCE
ION DENSITY
IONS
OSCILLATIONS
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA WAVES
ROTATING PLASMA