Thermal bremsstrahlung from high-temperature plasmas
Analytic expressions are derived for the total bremsstrahlung energy-loss rate per unit volume and the spectral emission rate per unit volume and the spectral emission rate of a very hot (approx.10/sup 7/-10/sup 9/ K) plasma. At these temperatures the principal contribution to emission can be computed from the nonrelativistic limit of electron-ion bremsstrahlung in the Born approximation. Modifications to this rate are evaluated from (1) relativistic corrections to the thermal-electron velocity distribution function, (2) relativistic and spin corrections to the nonrelativistic electron-ion bremsstrahlung cross section, (3) electron-electron bremsstrahlung, and (4) first-order Born approximation corrections to electron-ion bremsstrahlung. Modifications (1), (2), and (3) are of relative order kT/mc/sup 2/, and modification (4) is of relative order (Ry/kT)/sup 1/2/; at 10/sup 8/ K, each is of order 10%.
- Research Organization:
- Department of Physics, University of California, San Diego
- OSTI ID:
- 6821708
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 238:3; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Radio & X-Ray Sources
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BORN APPROXIMATION
BREMSSTRAHLUNG
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-ELECTRON INTERACTIONS
ELECTRON-ION COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
EMISSION
ENERGY LOSSES
FERMIONS
INTERACTIONS
ION COLLISIONS
IONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LOSSES
PARTICLE INTERACTIONS
PLASMA
RADIATIONS