Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 21: Experimentelle Methoden der Astroteilchenphysik I

T 21.8: Vortrag

Montag, 19. März 2018, 17:50–18:05, Z6 - SR 2.013

A new end-to-end calibration of the Fluorescence Detector of the Pierre Auger Observatory * — •Eric Mayotte for the Pierre Auger collaboration — Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal

The Fluorescence Telescopes are crucial to the science goals of the Pierre Auger Observatory. Currently, to ensure the accuracy of their measurements, a relative calibration of each telescope is performed nightly. To improve upon this established calibration, as well as to improve the time-dependent end-to-end calibration of each telescope's optics and camera, a new absolute calibration process has been developed. The core of the technique consists of scanning a calibrated Lambert-sphere UV light source across the aperture of the outermost component of each of the telescope's optics and reading out the response of the PMT camera. The camera response is then compared to the known light source characteristics and simulated end-to-end optical performance of the instrumentation in order to provide a real-world absolute calibration of each telescope. This talk will give a brief overview of the method as well as the absolute calibration of the Lambert-sphere light source. Preliminary measurements on the light source output intensity, uniformity, and time-stability will also be presented. * Gefördert durch die BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A17PX1 und 05A17VK1)