Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 44: Experimentelle Methoden der Astroteilchenphysik II
T 44.8: Vortrag
Dienstag, 20. März 2018, 18:15–18:30, Z6 - SR 2.013
Logging device for in-situ measurements of luminescence in ice — •Anna Pollmann for the IceCube collaboration — Bergische Universität Wuppertal
Luminescence is induced by highly ionizing particles passing through matter due to excitation of surrounding atoms. In particular, this mechanism is present also in pure H2O ice, which was irradiated by ionizing radiation.
The production of luminescence light is not constrained by a minimal speed threshold of the incident particle as in contrast to Cherenkov light. Thus, slow particles can be detected by utilizing luminescence in large water-Cherenkov detectors with high sensitivity such as IceCube. These particles are highly ionizing, heavy particles proposed beyond the Standard Model of particle physics, such as magnetic monopoles.
The observables of luminescence, such as wavelength spectra and decay times, are highly dependent on the properties of the medium. The usage of luminescence at the IceCube neutrino telescope will therefore be prepared by an in-situ measurement within a deep bore hole which is close to IceCube.
A logging device will be presented that is currently under development in order to measure the depth dependent properties of luminescence in the South Pole ice. A radioactive source will be attached to the ice within the bore hole and the backwards scattered luminescence light will be collected and analyzed.