The Baikal-GVD detector calibration
Abstract
In April 2019, the Baikal-GVD collaboration finished the installation of the fourth and fifth clusters of the neutrino telescope Baikal-GVD. Momentarily, 1440 Optical Modules (OM) are installed in the largest and deepest freshwater lake in the world, Lake Baikal, instrumenting 0.25 cubic km of sensitive volume. The Baikal-GVD is thus the largest neutrino telescope on the Northern Hemisphere. The first phase of the detector construction is going to be finished in 2021 with 9 clusters, 2592 OMs in total, however the already installed clusters are stand-alone units which are independently operational and taking data from their commissioning. Huge number of channels as well as strict requirements for the precision of the time and charge calibration (ns, p.e.) make calibration procedures vital and very complex tasks. The inter cluster time calibration is performed with numerous calibration systems. The charge calibration is carried out with a Single Photo-Electron peak. The various data acquired during the last three years in regular and special calibration runs validate successful performance of the calibration systems and of the developed calibration techniques. The precision of the charge calibration has been improved and the time dependence of the obtained calibration parameters have been cross-checked. The multiple calibration sources verified a 1.5 - 2.0 ns precision of the in-situ time calibrations. The time walk effect has been studied in detail with in situ specialized calibration runs.
Keywords
Cite
@article{arxiv.1908.05458,
title = {The Baikal-GVD detector calibration},
author = {GVD Collaboration and A. D. Avrorin and A. V. Avrorin and V. M. Aynutdinov and R. Bannash and I. A Belolaptikov and V. B. Brudanin and N. M. Budnev and G. V. Domogatsky and A. A. Doroshenko and R. Dvornicky and A. N. Dyachok and Zh. -A. M. Dzhilkibaev and L. Fajth and S. V Fialkovsky and A. R. Gafarov and K. V. Golubkov and N. S. Gorshkov and T. I. Gress and R. Ivanov and K. G. Kebkal and O. G. Kebkal and E. V. Khramov and M. M. Kolbin and K. V. Konischev and A. V. Korobchenko and A. P. Koshechkin and A. V. Kozhin and M. V. Kruglov and M. K. Kryukov and V. F. Kulepov and M. B. Milenin and R. A. Mirgazov and V. Nazari and A. I. Panfilov and D. P. Petukhov and E. N. Pliskovsky and M. I. Rozanov and E. V. Rjabov and V. D. Rushay and G. B. Safronov and B. A. Shaybonov and M. D. Shelepov and F. Simkovic and A. V. Skurikhin and A. G. Solovjev and M. N. Sorokovikov and I. Stekl and O. V. Suvorova and E. O. Sushenok and V. A. Tabolenko and B. A. Tarashansky and S. A. Yakovlev},
journal= {arXiv preprint arXiv:1908.05458},
year = {2019}
}
Comments
Contribution from the Baikal-GVD Collaboration presented at the 36th International Cosmic Ray Conference, Madison, Wisconsin, USA, 24 July - 1 August 2019. Proceeding: PoS-ICRC2019-0878