NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 64 of 28117
Electromagnetic ion beam instabilities
External Online Source: doi:10.1063/1.864797
Author and Affiliation:
Gary, S. P.(Los Alamos Scientific Lab., NM, United States)
Foosland, D. W.(Los Alamos National Laboratory, Los Alamos, NM, United States)
Smith, C. W.(Los Alamos Scientific Lab., NM, United States)
Lee, M. A.(New Hampshire, University, Durham, NH, United States)
Goldstein, M. L.(NASA Goddard Space Flight Center, Laboratory for Extraterrestrial Physics, Greenbelt, MD, United States)
Abstract: The linear theory of electromagnetic instabilities driven by an energetic ion beam streaming parallel to a magnetic field in a homogeneous Vlasov plasma is considered. Numerical solutions of the full dispersion equation are presented. At propagation parallel to the magnetic field, there are four distinct instabilities. A sufficiently energetic beam gives rise to two unstable modes with right-hand polarization, one resonant with the beam, the other nonresonant. A beam with sufficiently large T (perpendicular to B)/T (parallel to B) gives rise to the left-hand ion cyclotron anisotropy instability at relatively small beam velocities, and a sufficiently hot beam drives unstable a left-hand beam resonant mode. The parametric dependences of the growth rates for the three high beam velocity instabilities are presented here. In addition, some properties at oblique propagation are examined. It is demonstrated that, as the beam drift velocity is increased, relative maxima in growth rates can arise at harmonics of the ion cyclotron resonance for both right and left elliptically polarized modes.
Publication Date: Jul 01, 1984
Document ID:
19840059858
(Acquired Nov 28, 1995)
Accession Number: 84A42645
Subject Category: PLASMA PHYSICS
Document Type: Journal Article
Publication Information: Physics of Fluids (ISSN 0031-9171); 27; 1852-186
Publisher Information: United States
Contract/Grant/Task Num: NSF ATM-83-11241; NAS10-23726; NAGW-76; NAG5-228
Financial Sponsor: NASA; United States
Organization Source: Los Alamos Scientific Lab.; NM, United States
New Hampshire Univ.; Durham, NH, United States
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CYCLOTRON RESONANCE; ELECTROMAGNETIC FIELDS; ION BEAMS; MAGNETOHYDRODYNAMIC STABILITY; PLASMA INTERACTIONS; PLASMA WAVES; PLASMA-PARTICLE INTERACTIONS; COLLISIONLESS PLASMAS; ION TEMPERATURE; PLASMA DRIFT; POLARIZATION CHARACTERISTICS; PROPAGATION MODES; VLASOV EQUATIONS
Imprint And Other Notes: Physics of Fluids (ISSN 0031-9171), vol. 27, July 1984, p. 1852-1862. Research sponsored by the U.S. Department of Energy.
Miscellaneous Notes: Research sponsored by the U.S. Department of Energy
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 17, 2011
Contact Us