Classical bremsstrahlung radiation from electron–ion encounters in a nonideal plasma

Abstract

The classical electron–ion Coulomb bremsstrahlung process is investigated in a nonideal plasma. An effective pseudopotential model taking into account plasma-screening and collective effects is applied to describe the electron-ion interaction potential in a nonideal plasma. The screened hyperbolic-orbit trajectory method is applied to the motion of the projectile electron in order to investigate the bremsstrahlung radiation cross-section as a function of the scaled impact parameter, eccentricity, nonideal-plasma parameter, Debye length, projectile energy, and photon energy. It is found that the collective effect reduces the bremsstrahlung radiation cross-section on both the soft- and hard-photon cases. For small impact parameters, the nonideal-plasma effect on the bremsstrahlung radiation cross-section is found to be quite small. It is also found that the maximum position of the bremsstrahlung radiation cross-section gets closer to the target ion with increasing nonideal-plasma effect.

Classical bremsstrahlung in a non-ideal plasma with effective interaction

“…It has been noted by several authors, that a classical treatment of bremsstrahlung leads to reasonable approximations for the quantum-mechanical expressions in many cases. A very successful approach to the cross section of classical bremsstrahlung is due to Gould (1970) and has been applied to a variety of plasma conditions recently (Jung 1994(Jung , 2002Jung and Jeong 1996). Carrying out this approach, different approximative methods to describe the classical motion of particles in a plasma have been studied, such as the straight-line (SL) and the hyperbolic-orbit (HO) trajectory methods.…”