Coulomb correction effects on bremsstrahlung spectra from non-Maxwellian plasmas

Jung, Young-Dae
October 2001
Applied Physics Letters;10/8/2001, Vol. 79 Issue 15, p2330
Academic Journal
Coulomb correction effects are investigated on electron–ion bremsstrahlung emission from a non-Maxwellian velocity distribution plasma of the form exp[-(ν/ν[sub m])[sup m]] where ν[sub m][sup 2]=(3k[sub B]T[sub e]/M[sub e])Γ(3/m)/Γ(5/m) and 2≤m≤5. The bremsstrahlung emission rate is obtained as a function of the photon energy. For soft photon radiations, the Coulomb correction effects on the bremsstrahlung emission rate are found to be more significant for the distribution with m=2, i.e., Maxwellian distribution plasmas. However, for hard photon radiations, the Coulomb correction effects are found to be almost independent of the non-Maxwellian character. Thus, it would be possible to figure out the form of the electron distribution function using hard bremsstrahlung spectra rather than soft bremsstrahlung spectra since the bremsstrahlung emission rate without the Coulomb corrections only depends on the non-Maxwellian character for hard photon radiations. © 2001 American Institute of Physics.


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