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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">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it-2018-8-28-31</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-781</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>ИЗМЕРЕНИЯ ВРЕМЕНИ И ЧАСТОТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TIME AND FREQUENCY MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Оценка возможного уменьшения предельной нестабильности частоты водородного генератора при использовании пучка атомов в одном квантовом состоянии</article-title><trans-title-group xml:lang="en"><trans-title></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>Беляев</surname><given-names>А. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Демидов</surname><given-names>Н. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Поляков</surname><given-names>В. А.</given-names></name></name-alternatives><email xlink:type="simple">polyakov@vremya-ch.com</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>Тимофеев</surname><given-names>Ю. В.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>ЗАО «ВРЕМЯ-Ч»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>8</issue><fpage>28</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Беляев А.А., Демидов Н.А., Поляков В.А., Тимофеев Ю.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Беляев А.А., Демидов Н.А., Поляков В.А., Тимофеев Ю.В.</copyright-holder><copyright-holder xml:lang="en">Беляев А.А., Демидов Н.А., Поляков В.А., Тимофеев Ю.В.</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://www.izmt.ru/jour/article/view/781">https://www.izmt.ru/jour/article/view/781</self-uri><abstract><p>Выполнена оценка возможного уменьшения предельной нестабильности частоты водородного генератора при использовании двойной сортировки атомов водорода по энергетическим состояниям. Показано, что при получении пучка атомов водорода в одном квантовом состоянии возможно уменьшение нестабильности частоты примерно в 1,6 раза до значения .</p></abstract><trans-abstract xml:lang="en"><p>The frequency stability improvement estimation of active hydrogen maser with single state selected beam has performed. The frequency stability caused by microwave cavity noises is . The frequency stability possible improvement in comparing with present hydrogen masers is 1,6 times</p></trans-abstract><kwd-group xml:lang="ru"><kwd>активный водородный стандарт частоты</kwd><kwd>нестабильность частоты</kwd><kwd>система двойной сортировки атомов</kwd><kwd>аctive hydrogen maser</kwd><kwd>frequency stability</kwd><kwd>double selecting system</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">Поляков В. А., Беляев А. А., Демидов Н. А., Тимофеев Ю. В. 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