Polarization of Photons Scattered by Ultra-Relativistic Ion Beams

Polarization of Photons Scattered by Ultra-Relativistic Ion Beams Full article

Journal

Annalen der Physik
ISSN: 0003-3804 , E-ISSN: 1521-3889

Output data

Year: 2022, Volume: 534, Number: 3, Article number : 2100252, Pages count : DOI: 10.1002/andp.202100252

Authors

Volotka A. ¹ , Samoilenko D. ² , Fritzsche S. ^3,4 , Serbo V.G. ^1,5,6 , Surzhykov A. ^7,8,9

Affiliations

1	School of Physics and Engineering, ITMO University, Saint-Petersburg, RUS–197101, Russian Federation
2	Institute for Experimental Physics, University of Hamburg, Hamburg, D–22761, Germany
3	Helmholtz–Institut Jena, Jena, D–07743, Germany
4	Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Jena, D–07743, Germany
5	Novosibirsk State University, Novosibirsk, RUS–630090, Russian Federation
6	Sobolev Institute of Mathematics, Novosibirsk, RUS–630090, Russian Federation
7	Fundamental physics for metrology, Physikalisch–Technische Bundesanstalt, Braunschweig, D–38116, Germany
8	Institut für Mathematische Physik, Technische Universität Braunschweig, Braunschweig, D–38106, Germany
9	Laboratory for Emerging Nanometrology Braunschweig, Braunschweig, D-38106, Germany

Funding (2)

1	Министерство науки и высшего образования РФ	075-15-2021-1349
2	Russian Science Foundation	21-42-04412

A theoretical investigation of the elastic resonant scattering of photons by ultra–relativistic and partially stripped ions is presented. Particular attention in the study is given to the angular distribution and polarization of scattered photons as “seen” in both the ion-rest and laboratory reference frames. In order to evaluate these angular and polarization properties, the irreducible polarization tensor approach is combined with the density matrix theory. If, furthermore, the ion–photon coupling is treated within the electric dipole approximation, this framework enables one to obtain simple analytical expressions for both the emission pattern and the polarization Stokes parameters of the outgoing radiation. These (analytical) expressions for the (Formula presented.), (Formula presented.), and (Formula presented.) transitions are displayed and analyzed, that are of interest for the Gamma Factory project and whose realization is currently under discussion at CERN. Based on the performed analysis, it is demonstrated that the resonantly scattered photons can be strongly (linearly or circularly) polarized, and that this polarization can be well controlled by adjusting either the emission angle and/or the polarization state of the incident radiation. Moreover, the potential of the photon scattering for measuring the spin-polarization of ion beams is also discussed in detail.

Volotka A. , Samoilenko D. , Fritzsche S. , Serbo V.G. , Surzhykov A.
Polarization of Photons Scattered by Ultra-Relativistic Ion Beams
Annalen der Physik. 2022. V.534. N3. 2100252 . DOI: 10.1002/andp.202100252 WOS Scopus РИНЦ OpenAlex

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