The cyclotron maser instability - Application to low-density magnetoplasmas

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169828· OSTI ID:5911968

Ladreiter, H P ^[1]

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1. Paris, Observatoire, Meudon (France)

The cylcotron maser instability is applied to low-density magnetoplasmas to derive simple expressions relating the wave-emergent angle of the amplified wave (theta) and the ratio f/f(c) at the source to the normalized (to the light velocity c) parallel bulk velocity (PBV) of the instability (characteristic for an auroral electron distribution function). It is shown that, for PBV corresponding to 1-10 keV, theta is nearly perpendicular with respect to the magnetic field and is decreasing as PBV increases. The results are highly relevant to the lower-frequency auroral emission of Jupiter and Saturn. 21 refs.

• OSTI ID: 5911968
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 370; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
AMPLIFIERS
ATMOSPHERES
AURORAE
CYCLOTRON INSTABILITY
CYCLOTRON RESONANCE
ELECTRONIC EQUIPMENT
EQUIPMENT
INSTABILITY
JUPITER PLANET
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
PLANETARY ATMOSPHERES
PLANETARY MAGNETOSPHERES
PLANETS
PLASMA
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RESONANCE
SATURN PLANET