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The importance of plasma effects on electron-cyclotron maser-emission from flaring loopsElectron cyclotron maser instability has been suggested as the cause of the observed short (10-20 msec), intense (an approximate brightness temperature of 10 to the 15th K) and up to 100% polarized microwave solar emission. It is shown that plasma effects and thermal cyclotron damping, ignored in previous theories, play an important role in controlling the frequency range of the emission. The radio emission is suppressed for ratios of the plasma frequency to the cyclotron frequency smaller than 0.4. An examination of the cyclotron damping, reveals that the maser action is suppressed unless a large fraction (i.e., over 10%) of the accelerated electrons participates in the emission process.
Document ID
19820060594
Document Type
Reprint (Version printed in journal)
Authors
Sharma, R. R. (Maryland Univ. College Park, MD, United States)
Vlahos, L. (Maryland Univ. College Park, MD, United States)
Papadopoulos, K. (Maryland, University College Park, MD, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1982
Publication Information
Publication: Astronomy and Astrophysics
Volume: 112
Issue: 2, Au
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-81
Distribution Limits
Public
Copyright
Other