Plasma bremsstrahlung emission at electron energy from low up to extreme relativistic values

TL;DR

This paper analyzes plasma bremsstrahlung emission across a wide electron energy spectrum, providing calculations, corrections, and formulas for both non-relativistic and relativistic regimes.

Contribution

It offers comprehensive calculations and formulas for plasma bremsstrahlung emission from low to extreme relativistic electron energies, including corrections to existing approximations.

Findings

Born approximation is highly accurate at relativistic energies

Corrections are provided for low-energy regimes

Formulas approximate numerical results across energy ranges

Abstract

We consider the bremsstrahlung of electrons of fully ionized plasma. Electron energy range extends from a few hundred electron volts before the extreme relativistic energies of several MeV. The results of calculations of effective slow-down rate of a single electron and the power emission from a volume of the plasma with Maxwellian electrons. At relativistic energies, the Born approximation yields highly accurate results. Correction to the Born approximation are considered for low-energy regimes. In the high-energy regimes numerical results are close to extreme relativistic analytic results. The formulas are suggested that approximate the results of numerical calculations.