Physics – Nuclear Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009nuphs.197...74r&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 197, Issue 1, p. 74-77.
Physics
Nuclear Physics
Scientific paper
The optical modules of all currently operating neutrino telescopes contain one standard PMT with a large hemispherical photo-cathode. The maximum spatial resolution of this detection principle is thus limited to the photo-cathode area and no information is obtained on the direction of the incoming photons. We propose a new direction-sensitive design featuring a fisheye lens and a hybrid photon detector. The lens system maps incoming photons from one direction on a well-defined point on the photo-cathode of the hybrid photon detector. The photo-electrons are accelerated in a cross-focussed optics and detected using a pixelated anode, which allows for very high spatial resolution. As a candidate chip for the photo-electron detection we propose the Timepix detector of the Medipix family. We have successfully shown its capability to detect photo-electrons in the experiment and evaluated the time resolution by simulation and measurement.
Anton Gisela
Gebert Ulrike
Joram Christian
Michel Thilo
Rügheimer Tilman K.
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