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FOR2783 2022

12.–14. Sept. 2022
LMU Munich - Garching
Europe/Berlin Zeitzone

Sitzung

Vacuum birefringence and X-ray polarimetry

12.09.2022, 14:00
Lecture hall (LMU Munich - Garching)

Lecture hall

LMU Munich - Garching

Am Coulombwall 1, 85748 Garching Also via Zoom: https://lmu-munich.zoom.us/j/99131580222?pwd=dlBpTkVLcjVtVXRBZHdPRzlscEtFZz09 Meeting-ID: 991 3158 0222 Kenncode: 300448

Präsentationsmaterialien

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  1. 2. Direct accessibility of the fundamental constants governing light-by-light scattering
    Felix Karbstein
    12.09.22, 14:00
    Vacuum birefringence and X-ray polarimetry
    Oral

    Quantum field theory predicts the vacuum to exhibit a non-linear response to strong electromag- netic fields. This fundamental tenet has remained experimentally challenging and is yet to be tested in the laboratory. We present proof of concept and detailed theoretical analysis of an experimental setup for precision measurements of the quantum vacuum signal generated by the collision of a bril-...

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  2. 7. Avoiding Umweganregungen in X-ray polarizers
    Willi Hippler
    12.09.22, 14:45
    Vacuum birefringence and X-ray polarimetry
    Oral

    This was the topic of my Master thesis.
    I will discuss the limitations of the polarization purity in X-ray channelcut polarizers due to Umweganregungen. To reach polarization purities in the range of 10^(-12) or better, these Umweganregungen has to be avoided. This can be done by align the azimuthal angle of the crystal very precicely. I developed a new and faster method, based on the...

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