Bremsstrahlung vs. Thomson scattering in VUV-FEL plasma experiments
Abstract
We determine the spectral photon yield from a hot dense plasma irradiated by VUV-FEL light in a Thomson scattering experiment. The Thomson signal is compared to the emission background mainly caused by bremsstrahlung photons. We determine experimental conditions that allow for a signal-to-background ratio larger than unity. By derivation of the Thomson and the bremsstrahlung spectrum from linear response theory we present a consistent quantum statistical approach to both processes. This allows for a systematic treatment of medium and quantum effects such as dynamical screening and strong collisions. Results are presented for the threshold FEL-intensity as a function of density and temperature. We show that the account for quantum effects leads to larger thresholds as compared to previous work.
Cite
@article{arxiv.physics/0601212,
title = {Bremsstrahlung vs. Thomson scattering in VUV-FEL plasma experiments},
author = {C. Fortmann and R. Redmer and H. Reinholz and G. Röpke and A. Wierling and W. Rozmus},
journal= {arXiv preprint arXiv:physics/0601212},
year = {2016}
}
Comments
13 pages, 10 figures, and 1 table v2: minor corrections in figures and appendix