Abstract
The Dual optical sensors in an Ellipsoid Glass for Gen2 (DEgg) is one of the optical modules being developed for the IceCube-upgrade and the IceCube-Gen2 projects. The D-Egg has two 8-inch high-quantum-efficiency PMTs facing downwards and upwards, which are coupled to a highly ultraviolet-transparent glass vessel to detect Cherenkov photons in nearly all directions. In this paper, expected performances of the D-Egg are discussed.
Highlights
The IceCube Neutrino Observatory [1] is a cubic kilometer Cherenkov detector in the deep ice at the South Pole
It is anticipated that additional information possibly provided by new sensors, such as positions of the Cherenkov photons at each optical sensor, will lead to advances in event reconstructions
Since the intensity of Cherenkov photons increases at shorter wavelengths, improving UV-transparencies of the glass sphere and the optical elastomer is key to obtain a better
Summary
The IceCube Neutrino Observatory [1] is a cubic kilometer Cherenkov detector in the deep ice at the South Pole. The next-generation optical module for such detector extensions is expected to have improved detection efficiency for Cherenkov photons over the current IceCube Digital Optical Module (DOM). Since the intensity of Cherenkov photons increases at shorter wavelengths, improving UV-transparencies of the glass sphere and the optical elastomer is key to obtain a better. Compared to the DOM, the thicknesses of the glass and the elastomer for the D-Egg are reduced to 10 mm and 5 mm, respectively, at the top (bottom) of the module. The effective area of a PMT in a D-Egg is 25 % smaller than that of a DOM, one can expect a comparable or even better detection efficiency of Cherenkov photons in all directions by introducing a dual high-QE PMT system and the UV-transparent glass sphere and optical elastomers.
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