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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">npe</journal-id><journal-title-group><journal-title xml:lang="ru">Ядерная физика и инжиниринг</journal-title><trans-title-group xml:lang="en"><trans-title>Nuclear Physics and Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-5629</issn><issn pub-type="epub">2079-5637</issn><publisher><publisher-name>МИФИ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.56304/S2079562920060305</article-id><article-id custom-type="elpub" pub-id-type="custom">npe-145</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Инженерное проектирование ядерно-физической аппаратуры</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Engineering Design of Nuclear Physical Equipment</subject></subj-group></article-categories><title-group><article-title>Система калибровочных телескопов экспериментального комплекса НЕВОД как детектор ШАЛ</article-title><trans-title-group xml:lang="en"><trans-title>Calibration Telescope System of the Nevod Experimental Complex as the EAS Detector</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинин</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinin</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Е. Н. Калинин, </p><p>Москва, 115409. </p></bio><bio xml:lang="en"><p>E. N. Kalinin,</p><p>Moscow, 115409.</p></bio><email xlink:type="simple">zhenya-toodoo@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Амельчаков</surname><given-names>М. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Amelchakov</surname><given-names>M. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>М. Б. Амельчаков,</p><p>Москва, 115409.</p></bio><bio xml:lang="en"><p>M. B. Amelchakov,</p><p>Moscow, 115409.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет “МИФИ”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>24</day><month>04</month><year>2024</year></pub-date><volume>12</volume><issue>1</issue><fpage>42</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Калинин Е.Н., Амельчаков М.Б., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Калинин Е.Н., Амельчаков М.Б.</copyright-holder><copyright-holder xml:lang="en">Kalinin E.N., Amelchakov M.B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://npe.elpub.ru/jour/article/view/145">https://npe.elpub.ru/jour/article/view/145</self-uri><abstract><p>Экспериментальный комплекс НЕВОД включает несколько установок для совместного исследования различных компонент широких атмосферных ливней (ШАЛ). Одной из таких установок является система калибровочных телескопов (СКТ). Данная установка используется для калибровки измерительных модулей черенковского водного детектора, а также для регистрации электрон-фотонной и мюонной компонент ШАЛ. Восстановление параметров широких атмосферных ливней по данным СКТ имеет целью расширение возможностей всего экспериментального комплекса для исследования ливней в области энергий первичных частиц от 0.1 до 10 ПэВ. Основной задачей восстановления является определение координат положения оси ШАЛ с помощью метода максимального правдоподобия. Для поиска оптимальных значений параметров используется итерационный симплекс-метод Нелдера−Мида. Точность оценки восстанавливаемых параметров ливней изучалась на моделированных событиях. Моделирование проводилось на основе функции пространственного распределения Нишимуры−Каматы−Грейзена для заряженных частиц в ливне. Приводятся результаты восстановления параметров ШАЛ, зарегистрированных в верхней плоскости СКТ.</p></abstract><trans-abstract xml:lang="en"><p>The NEVOD experimental complex includes several installations for the joint study of various components of extensive air showers (EAS). One of the installations is the calibration telescope system (CTS). This installation is used for calibration of the measuring modules of the Cherenkov water detector, as well as for recording the electron-photon and muon components of the EAS. The reconstruction of the EAS parameters according to the CTS data aims to improve the capabilities of the entire experimental complex for studying showers in the region of primary particle energies from 0.1 to 10 PeV. The main task of reconstruction is to determine the coordinates of the EAS axis position using the maximum likelihood method. The iterative simplex method of Nelder-Mead is used to find the optimal values of the parameters. The accuracy of the reconstructed parameters was estimated on simulated events. The simulation was based on the Nishimura-Kamata-Greisen lateral distribution function for EAS charged particles. The results of reconstruction of the parameters of the EAS registered in the upper plane of the SCT are presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>широкий атмосферный ливень</kwd><kwd>электрон-фотонная компонента</kwd><kwd>функция пространственного распределения</kwd><kwd>сцинтилляционный детектор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>extensive air shower</kwd><kwd>electron-photon component</kwd><kwd>lateral distribution function</kwd><kwd>scintillation detector</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bartoli B. et al. // Phys. Rev. D . 2012. V. 85. P. 092005.</mixed-citation><mixed-citation xml:lang="en">Bartoli B. et al. // Phys. Rev. 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