Method and device for tests of the laser optical calibration system for the Baikal-GVD underwater neutrino Cherenkov telescope

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F21%3A00357068" target="_blank" >RIV/68407700:21670/21:00357068 - isvavai.cz</a>

Result on the web

<a href="https://pos.sissa.it/395/1060/pdf" target="_blank" >https://pos.sissa.it/395/1060/pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Method and device for tests of the laser optical calibration system for the Baikal-GVD underwater neutrino Cherenkov telescope

Original language description

The large-scale deep underwater Cherenkov neutrino telescopes like Baikal-GVD, ANTARES or KM3NeT, require calibration and testing methods of their optical modules. These methods usually include laser-based systems, which allow to check the telescope responses to the light and for real-time monitoring of the optical parameters of water such as absorption and scattering lengths, which show seasonal changes in natural reservoirs of water. We will present a testing method of a laser calibration system and a set of dedicated tools developed for Baikal-GVD, which includes a specially designed and built, compact, portable, and reconfigurable scanning station. This station is adapted to perform fast quality tests of the underwater laser sets just before their deployment in the telescope structure. The testing procedure includes the energy stability test of the laser device, 3D scan of the light emission from the diffuser and attenuation test of the optical elements of the laser calibration system. The test bench consists primarily of an automatic mechanical scanner with a movable Si detector, beam splitter with a reference Si detector and, optionally, Q-switched diode-pumped solid-state laser used for laboratory scans of the diffusers. The presented test bench enables a three-dimensional scan of the light emission from diffusers, which are designed to obtain the isotropic distribution of photons around the point of emission. The results of the measurement can be easily shown on a 3D plot immediately after the test and may be also implemented to a dedicated program simulating photons propagation in water, which allows to check the quality of the diffuser in the scale of the Baikal-GVD telescope geometry.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/EF16_019%2F0000766" target="_blank" >EF16_019/0000766: Engineering applications of microworld physics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

37th International Cosmic Ray Conference

ISBN

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ISSN

1824-8039

e-ISSN

1824-8039

Number of pages

9

Pages from-to

1-9

Publisher name

Proceedings of Science

Place of publication

Trieste

Event location

Berlin

Event date

Jul 12, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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