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T: Fachverband Teilchenphysik
T 21: Experimentelle Methoden der Astroteilchenphysik I
T 21.2: Vortrag
Montag, 19. März 2018, 16:20–16:35, Z6 - SR 2.013
Experiments on intensity interferometry — •Andreas Zmija1, Peter Deiml1, Adrian Zink1, Felix Pfeifer1, Gisela Anton1, Stefan Funk1, Dmitry Malyshev1, Thilo Michel1, Raimund Schneider2, and Joachim von Zanthier2 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP — 2Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstr. 1, 91058 Erlangen, Germany
Intensity interferometry is a method that allows the measurement of the angular size of a star using at least two telescopes with varying baseline although each telescope cannot resolve the size of the star. The measurement principle is based on the correlation of the light intensities of a thermal source (e.g a star) received at two different positions on earth. Pioneering work has already been carried out several decades ago by Hanbury Brown and Twiss. The future Cherenkov-Telescope-Array CTA might be a good platform to exploit this Hanbury Brown-Twiss (HBT) effect for the investigation of the sizes of celestial objects. We have carried out laboratory experiments using a laser-illuminated ground glass disc and a narrow-bandwidth LED to test our measurement setup. In this contribution, we will briefly review the HBT effect and present our laboratory setup and the test results in detail.