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Updated: Mar 17, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
Strong higher-order resonant contributions to x-ray line polarization in hot plasmas
Chintan Shah1,2, Pedro Amaro1, Rene Steinbrügge2
1Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany.
Abstract:
We studied angular distributions of x rays emitted in resonant recombination of highly charged iron and krypton ions, resolving dielectronic, trielectronic, and quadruelectronic channels. A tunable electron beam drove these processes, inducing x rays registered by two detectors mounted along and perpendicular to the beam axis. The measured emission asymmetries comprehensively benchmarked full-order atomic calculations. We conclude that accurate polarization diagnostics of hot plasmas can only be obtained under the premise of inclusion of higher-order processes that were neglected in earlier work.
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