Invitation to the series of seminars

  • ustav
  • 22.06.2023
We kindly invite you to the series of seminars which will take place at the building of the Mathematical Institute and Rektorat (Na Rybnicku 1) at the Uni Space Lab (also known as ARMA).
Rastislav Dvornický: Large deep underwater neutrino telescope in Lake Baikal

The abstract: the Baikal-GVD is a large neutrino telescope under construction in Lake Baikal. Recently it is the largest neutrino telescope operating in Northern Hemisphere. The winter expedition of 2023 results in the three-dimensional detector array of 3 456 photo-sensitive units (optical modules). The data collection is allowed by the design of the experiment while being in a construction phase. In this contribution the design and the basic characteristics of the Baikal-GVD detector are presented.

Eliška Eckerová: Development of the double cascade reconstruction techniques in the Baikal-GVD neutrino telescope

The abstract: the Baikal-GVD is a neutrino telescope under construction in Lake Baikal - the deepest freshwater lake in the world. The main aim of this telescope is to detect astrophysical neutrinos via detection of the Cherenkov radiation emitted by the products of neutrino interactions. The basic detection unit of the Baikal-GVD is a photomultilpier tube enclosed in the pressure resistant glass sphere called optical module. In 2023, the Baikal-GVD consists of 3456 optical modules. One of the methods for observation of astrophysical neutrinos is detection of high-energy tau neutrinos, since their production rate in the atmosphere is negligible. If tau lepton originating in the charged current interaction of tau neutrino decays into electron or hadrons, so called double cascade signature is created. In this contribution development of the double cascade reconstruction techniques will be presented.
Zuzana Bradáčová: Selection techniques of neutrino-induced cascade events in the Baikal-GVD neutrino telescope
The abstract: he Baikal Gigaton Volume Detector (Baikal-GVD) is a 3-dimensional array of optical modules immersed to a depth of 1366 metres in Lake Baikal, Siberia. Its design is optimized to search for high-energy neutrinos coming from Galactic and extragalactic sources. Optical modules detect flashes of Cherenkov light from secondary charged particles induced in interactions of neutrinos with matter. Some charged and neutral current neutrino interactions lead to hadronic or electromagnetic cascade events. Apart from the neutrino cascades, the cascade-like Cherenkov light topologies can be also induced along the muon tracks. These event signatures, referred to as background cascades, constitute the main background in neutrino cascade channel. In this contribution a developed algorithm for suppression of the background cascades.

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