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Record 22 of 2406
The electromagnetic ion cyclotron beam anisotropy instability
External Online Source: doi:10.1016/0032-0633(87)90144-9
Author and Affiliation:
Peter Gary, S.(Los Alamos National Lab., NM, United States)
Schriver, David(Los Alamos National Laboratory, NM, United States)
Abstract: Electromagnetic instabilities driven by an anisotropic, relatively cool ion beam are studied for the case in which both the beam and the instabilities propagate parallel or antiparallel to a uniform magnetic field. At modest beam-core relative drift speeds, sufficiently large perpendicular-to-parallel beam temperature ratios and sufficiently large plasma beta, the mode of fastest growth rate is the ion cyclotron beam anisotropy instability. Because the right-hand polarized waves observed upstream of slow shocks in the earth's magnetotail can lead to the appropriate beam anisotropy, the ion cyclotron instability may be present and account for the left-hand polarized magnetic waves observed there. Also, because of its relatively low phase speed, the ion cyclotron beam anisotropy instability may provide the scattering necessary for ion Fermi acceleration at slow shocks of sufficiently high plasma beta.
Publication Date: Jan 01, 1987
Document ID:
19870045869
(Acquired Nov 28, 1995)
Accession Number: 87A33143
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Planetary and Space Science (ISSN 0032-0633); 35; 51-59
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Organization Source: Los Alamos National Lab.; NM, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ANISOTROPY; ELECTROMAGNETIC RADIATION; ION BEAMS; ION CYCLOTRON RADIATION; PLASMA-ELECTROMAGNETIC INTERACTION; WAVE GENERATION; GEOMAGNETIC TAIL; MAGNETIC FIELDS; POLARIZATION (WAVES); SPACE PLASMAS; WAVE DISPERSION
Imprint And Other Notes: Planetary and Space Science (ISSN 0032-0633), vol. 35, Jan. 1987, p. 51-59. Research supported by DOE, NASA and University of California.
Miscellaneous Notes: Research supported by DOE, NASA and University of California
Availability Source: Other Sources
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