NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
New contributions to transit-time damping in multidimensional systemsThe existence of two previously unrecognized contributions to transit-time damping in systems of more than one dimension is demonstrated and discussed. It is shown that these contributions cannot be treated by one-dimensional analyses unless it is assumed that the gradient of the field perpendicular to itself always vanishes. Such an assumption is unjustified in general and the new contributions can dominate damping by fast particles in more general situations. Analytic expressions obtained using a Born approximation are found to be in excellent agreement with numerical test-particle calculations of transit-time damping for a variety of field configurations. These configurations include those of a resonance layer and of a spherical wave packet, which approximates a collapsing wave packet in a strongly turbulent plasma. It is found that the fractional power absorption can be strongly enhanced in non-slablike field configurations.
Document ID
19890043756
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Robinson, P. A.
(Colorado, University Boulder, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1989
Publication Information
Publication: Physics of Fluids B
Volume: 1
ISSN: 0899-8221
Subject Category
Plasma Physics
Accession Number
89A31127
Funding Number(s)
CONTRACT_GRANT: NSG-7287
CONTRACT_GRANT: NAGW-91
CONTRACT_GRANT: NSF ATM-85-11906
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available