The Baikal-GVD detector calibration. (arXiv:1908.05458v1 [astro-ph.IM])

The Baikal-GVD detector calibration. (arXiv:1908.05458v1 [astro-ph.IM])
<a href="http://arxiv.org/find/astro-ph/1/au:+Collaboration_Baikal_GVD/0/1/0/all/0/1">Baikal-GVD Collaboration</a>: <a href="http://arxiv.org/find/astro-ph/1/au:+Avrorin_A/0/1/0/all/0/1">A.D. Avrorin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Avrorin_A/0/1/0/all/0/1">A.V. Avrorin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aynutdinov_V/0/1/0/all/0/1">V.M. Aynutdinov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bannash_R/0/1/0/all/0/1">R. Bannash</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Belolaptikov_I/0/1/0/all/0/1">I.A Belolaptikov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Brudanin_V/0/1/0/all/0/1">V.B. Brudanin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Budnev_N/0/1/0/all/0/1">N.M. Budnev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Domogatsky_G/0/1/0/all/0/1">G.V. Domogatsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Doroshenko_A/0/1/0/all/0/1">A.A. Doroshenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dvornicky_R/0/1/0/all/0/1">R. Dvornicky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dyachok_A/0/1/0/all/0/1">A.N. Dyachok</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dzhilkibaev_Z/0/1/0/all/0/1">Zh.-A.M. Dzhilkibaev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fajth_L/0/1/0/all/0/1">L. Fajth</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fialkovsky_S/0/1/0/all/0/1">S.V Fialkovsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gafarov_A/0/1/0/all/0/1">A.R. Gafarov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Golubkov_K/0/1/0/all/0/1">K.V. Golubkov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gorshkov_N/0/1/0/all/0/1">N.S. Gorshkov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gress_T/0/1/0/all/0/1">T.I. Gress</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ivanov_R/0/1/0/all/0/1">R. Ivanov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kebkal_K/0/1/0/all/0/1">K.G. Kebkal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kebkal_O/0/1/0/all/0/1">O.G. Kebkal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Khramov_E/0/1/0/all/0/1">E.V. Khramov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kolbin_M/0/1/0/all/0/1">M.M. Kolbin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Konischev_K/0/1/0/all/0/1">K.V. Konischev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Korobchenko_A/0/1/0/all/0/1">A.V. Korobchenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Koshechkin_A/0/1/0/all/0/1">A.P. Koshechkin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kozhin_A/0/1/0/all/0/1">A.V. Kozhin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kruglov_M/0/1/0/all/0/1">M.V. Kruglov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kryukov_M/0/1/0/all/0/1">M.K. Kryukov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kulepov_V/0/1/0/all/0/1">V.F. Kulepov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Milenin_M/0/1/0/all/0/1">M.B. Milenin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mirgazov_R/0/1/0/all/0/1">R.A. Mirgazov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nazari_V/0/1/0/all/0/1">V. Nazari</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Panfilov_A/0/1/0/all/0/1">A.I. Panfilov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Petukhov_D/0/1/0/all/0/1">D.P. Petukhov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pliskovsky_E/0/1/0/all/0/1">E.N. Pliskovsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rozanov_M/0/1/0/all/0/1">M.I. Rozanov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rjabov_E/0/1/0/all/0/1">E.V. Rjabov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rushay_V/0/1/0/all/0/1">V.D. Rushay</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Safronov_G/0/1/0/all/0/1">G.B. Safronov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shaybonov_B/0/1/0/all/0/1">B.A. Shaybonov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shelepov_M/0/1/0/all/0/1">M.D. Shelepov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Simkovic_F/0/1/0/all/0/1">F. Simkovic</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Skurikhin_A/0/1/0/all/0/1">A.V. Skurikhin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Solovjev_A/0/1/0/all/0/1">A.G. Solovjev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sorokovikov_M/0/1/0/all/0/1">M.N. Sorokovikov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stekl_I/0/1/0/all/0/1">I. Stekl</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Suvorova_O/0/1/0/all/0/1">O.V. Suvorova</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sushenok_E/0/1/0/all/0/1">E.O. Sushenok</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tabolenko_V/0/1/0/all/0/1">V.A. Tabolenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tarashansky_B/0/1/0/all/0/1">B.A. Tarashansky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yakovlev_S/0/1/0/all/0/1">S.A. Yakovlev</a>

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.

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