Electromagnetic ion beam instabilities

Journal Article · Sun Jul 01 04:00:00 EDT 1984 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864797· OSTI ID:6712838

Gary, S P; Smith, C W; Lee, M A; Goldstein, M L; Fooslund, D W

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/sub perpendicular//T/sub parallel/ 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.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6712838
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 27:7; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BEAMS
BOLTZMANN-VLASOV EQUATION
COLLISIONLESS PLASMA
COMPUTER CODES
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
HOMOGENEOUS PLASMA
INSTABILITY
ION BEAMS
MAGNETIC FIELDS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PLASMA INSTABILITY
POLARIZATION
RADIATIONS
RESONANCE