Ion cyclotron and spin-flip emissions from fusion products in tokamaks

Technical Report · Mon Feb 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6721193· OSTI ID:6721193

Arunasalam, V.; Greene, G. J.; Young, K. M.

Power emission by fusion products of tokamak plasmas in their ion cyclotron range of frequencies (ICRF) and at their spin-flip resonance frequency is calculated for some specific model fusion product velocity-space distribution functions. The background plasma of say deuterium (D) is assumed to be in equilibrium with a Maxwellian distribution both for the electrons and ions. The fusion product velocity distributions analyzed here are: (1) A monoenergetic velocity space ring distribution. (2) A monoenergetic velocity space spherical shell distribution. (3) An anisotropic Maxwellian distribution with T [perpendicular] [ne] T[parallel]and with appreciable drift velocity along the confining magnetic field. Single dressed'' test particle spontaneous emission calculations are presented first and the radiation temperature for ion cyclotron emission (ICE) is analyzed both for black-body emission and nonequilibrium conditions. Thresholds for instability and overstability conditions are then examined and quasilinear and nonlinear theories of the electromagnetic ion cyclotron modes are discussed. Distinctions between kinetic or causal instabilities'' and hydrodynamic instabilities'' are drawn and some numerical estimates are presented for typical tokamak parameters. Semiquantitative remarks are offered on wave accessibility, mode conversion, and parametric decay instabilities as possible for spatially localized ICE. Calculations are carried out both for k[parallel] = 0 for k[parallel] [ne] 0. The effects of the temperature anisotropy and large drift velocities in the parallel direction are also examined. Finally, proton spin-flip resonance emission and absorption calculations are also presented both for thermal equilibrium conditions and for an inverted'' population of states.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6721193
• Report Number(s): PPPL-2875; ON: DE93007935; TRN: 93-004899
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALPHA PARTICLES
ION CYCLOTRON-RESONANCE
SPIN FLIP
PROTONS
DECAY INSTABILITY
DISTRIBUTION FUNCTIONS
EMISSION
RAYLEIGH-TAYLOR INSTABILITY
THERMONUCLEAR REACTIONS
TOKAMAK DEVICES
BARYONS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
HADRONS
INSTABILITY
NUCLEAR REACTIONS
NUCLEONS
NUCLEOSYNTHESIS
PLASMA INSTABILITY
RESONANCE
SYNTHESIS
THERMONUCLEAR DEVICES
700380* - Elementary & Classical Processes in Plasmas- (1992-)