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Polarization measurement of dielectronic recombination transitions in highly charged krypton ions
- Source :
- Physical Review A 92, 042702 (2015)
- Publication Year :
- 2016
-
Abstract
- 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.<br />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)
Details
- Database :
- arXiv
- Journal :
- Physical Review A 92, 042702 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1606.06334
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.92.042702