Strong higher-order resonant contributions to x-ray line polarization in hot plasmas

Chintan Shah, Pedro Amaro, Rene Steinbrügge, Christian Beilmann, Sven Bernitt, Stephan Fritzsche, Andrey Surzhykov, José R. Crespo López-Urrutia, Stanislav Tashenov

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

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.

Original languageEnglish
Article number061201
JournalPhysical Review E
Volume93
Issue number6
DOIs
Publication statusPublished - 16 Jun 2016

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