Polarization measurement of dielectronic recombination transitions in highly charged krypton ions
| Autor: | Shah, Chintan, Jörg, Holger, Bernitt, Sven, Dobrodey, Stepan, Steinbrügge, René, Beilmann, Christian, Amaro, Pedro, Hu, Zhimin, Weber, Sebastian, Fritzsche, Stephan, Surzhykov, Andrey, López-Urrutia, José R. Crespo, Tashenov, Stanislav |
|---|---|
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physical Review A 92, 042702 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.92.042702 |
| Popis: | We report linear polarization measurements of x rays emitted due to dielectronic recombination into highly charged krypton ions. The ions in the He-like through O-like charge states were populated in an electron beam ion trap with the electron beam energy adjusted to recombination resonances in order to produce $K\alpha$ x rays. The x rays were detected with a newly developed Compton polarimeter using a beryllium scattering target and 12 silicon x-ray detector diodes sampling the azimuthal distribution of the scattered x rays. The extracted degrees of linear polarization of several dielectronic recombination transitions agree with results of relativistic distorted--wave calculations. We also demonstrate a high sensitivity of the polarization to the Breit interaction, which is remarkable for a medium-$Z$ element like krypton. The experimental results can be used for polarization diagnostics of hot astrophysical and laboratory fusion plasmas. Comment: 11 pages, 4 figures (Note that the Eqs. (5) and (10) of the original paper are corrected in Physical Review A 94, 029905(E) (2016). doi:10.1103/PhysRevA.94.029905) |
| Databáze: | arXiv |
| Externí odkaz: |
|