Electron cyclotron maser instability in the solar corona: The role of superthermal tails

Journal Article · Fri Mar 01 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/162991· OSTI ID:5549600

Vlahos, L; Sharma, R R

The effect of a superthermal component of electrons on the loss-cone--driven electron cyclotron maser instability is analyzed. We found that for a supertheral tail with temperature approx.10 keV (i) the first harmonic (X- and O-mode) is suppressed for n/sub t//n/sub r/roughly-equal1 (n/sub t/ and n/sub r/ are the densities of superthermal tail and loss-cone electrons) and (ii) the second harmonic (X- and O-modes) is suppressed for n/sub t//n/sub r/< or approx. =10/sup -1/. We present a qualitative discussion on the formation of superthermal taisl and suggest that superthermal tails play an important role on the observed or available power, at microwave frequencies, from the electron cyclotron maser instability in the solar corona.

• Research Organization: Astronomy Program, University of Maryland
• OSTI ID: 5549600
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 290:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics &amp; Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
AMPLIFIERS
ATMOSPHERES
CYCLOTRON INSTABILITY
ELECTRONIC EQUIPMENT
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
INSTABILITY
LEPTONS
LOSS CONE
MAGNETIC FIELDS
MAGNETIC FLUX
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OSCILLATIONS
PLASMA
PLASMA ACCELERATION
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
SOLAR ACTIVITY
SOLAR CORONA
SOLAR FLARES
STELLAR ATMOSPHERES
STELLAR CORONAE