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[en] An application of our developed silicon photodiode detector for radon progeny measurements is presented in this paper. It was determined the deposition velocity for free (3.6±0.7)x10-3 m s-1 and attached (1.0±0.5)x10-5 m s-1 fraction of short living radon progeny
[en] The PANDA experiment will investigate physics in the strong interaction regime utilizing antiproton-proton annihilations. The PANDA detector will comprise a Target Spectrometer as well as a Forward Spectrometer. In the target region, a barrel-shaped electromagnetic calorimeter with end-caps on both sides will be used. It will play a major role in detecting photons utilizing about 15500 PbWO4 crystals. Each of these crystals is read out by two independent Avalanche Photo Diodes. To ensure a close-as-possible similar behaviour, an optimization algorithm groups APDs into pairs based on a distance function applied to a number of selection-criteria. A threshold scan of the distance function gathers the best matching criterion. Hence, a model selection has been performed to obtain most precise operating parameters out of the APD measurements.
[en] In this paper we investigate the properties of two existing commercial APDs, an S2382 from Hammamatsu and a C30912E from EG and G, and consider their suitability as proportional photon detectors to measure the light output from scintillators and calorimeters. We first discuss briefly the operation of APDs and then report on measurements of the sensitivity of the gain to variation in temperature and bias voltage and inherent fluctuations in the gain process. (orig.)
[en] A new-generation high-granularity Shashlyk EM calorimeter read out by micropixel avalanche photodiodes with thermostabilization based on the Peltier element is designed and constructed.
[ru]Разработан и создан высокогранулярный ЭМ-калориметр нового поколения типа 'шашлык' со съемом информации микропиксельными лавинными фотодиодами с термостабилизацией на элементе Пельтье.
[en] The Pierre Auger Observatory successfully measures cosmic-ray air-showers at the highest energies by detecting both the fluorescence light produced in the atmosphere and the particle density of the shower at the ground. Nevertheless, this procedure does not allow for a precise measurement of the muon to electron ratio of a single shower. As this quantity is connected to the mass of the primary particle, it allows for a cosmic-ray mass composition measurement. To improve the ability of separating muons from the electromagnetic component, scintillator based detectors will be added to each surface detector station. The basic design consists of several scintillator bars feeding the produced light into a bundle of wavelength shifting fibers. The light can be detected by either photomultiplier tubes (PMTs) or by silicon photomultipliers (SiPMs). The latter benefit from their high photon detection efficiency and robustness. Three prototype devices based on SiPMs have successfully been installed at the Pierre Auger Observatory in September 2016. Their performance is studied.