Strong higher-order resonant contributions to x-ray line polarization in hot plasmas
| Autor: | C. Beilmann, Sven Bernitt, Chintan Shah, Stanislav Tashenov, Pedro Amaro, Andrey Surzhykov, José R. Crespo López-Urrutia, René Steinbrügge, Stephan Fritzsche |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Atomic Physics (physics.atom-ph)
Astrophysics::High Energy Astrophysical Phenomena chemistry.chemical_element FOS: Physical sciences 01 natural sciences Ion Physics - Atomic Physics 0103 physical sciences Perpendicular 010306 general physics 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Physics High Energy Astrophysical Phenomena (astro-ph.HE) Detector Krypton X-ray Plasma Polarization (waves) Physics - Plasma Physics Plasma Physics (physics.plasm-ph) chemistry Cathode ray Atomic physics Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics |
| Zdroj: | Physical Review E |
| Popis: | 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. 8 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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