Erlangen 2022 – scientific programme
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A: Fachverband Atomphysik
A 9: Collisions, scattering and correlation phenomena
A 9.4: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
Compton Polarimetry on the polarization transfer in hard x-ray Rayleigh scattering — •Wilko Middents1,2, Günter Weber2,3, Uwe Spillmann3, Marco Vockert1,2, Philip Pfäfflein1,2,3, Alexandre Gumberidze3, Sophia Strnat4,5, Andrey Surzhykov4,5, Andrey Volotka1,6, and Thomas Stöhlker1,2,3 — 1IOQ, FSU Jena — 2Helmholtz Institut Jena — 3GSI Darmstadt — 4PTB, Braunschweig — 5TU Braunschweig — 6ITMO University
For photon energies up to the MeV range, the fundamental photon-matter interaction process of elastic scattering, where both the energy of the incident and the scattered photon are the same is dominated by Rayleigh scattering. This process, referring to the 2nd order QED process of a photon being scattered on a bound electron exhibits a high degree of sensitivity to the polarization characteristics of the incoming photons. Thus precisely determining the poliarization of the incident and scattered photon beam allow a stringent tests of the underlying theory. For this purpose, we performed an experiment at the 3rd generation synchrotron facility PETRA III of DESY, Hamburg, scattering a highly linearly polarized hard x-ray beam with a photon energy of 175 keV on a gold target. The polarization characteristics of the scattered beam were analyzed within and out of the polarization plane of the incident synchrotron beam using a prototype 2D-sensitive silicon strip detector, developed within the SPARC collaboration, that can be utilized as a highly sensitive Compton polarimeter. We will present both experimental details as well as first results of this beamtime.