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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2026-70-4-296-301</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1321</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Когерентное переходное излучение, генерируемое электронными сгустками, выходящими из выводного канала микротрона</article-title><trans-title-group xml:lang="en"><trans-title>Coherent transition radiation emitted by electron bunches from the output channel of a microtron</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3448-7887</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Анищенко</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Anishchenko</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анищенко Сергей Владимирович – канд. физ.-мат. наук, вед. науч. сотрудник </p><p>ул. Бобруйская, 11, 220006, Минск </p></bio><bio xml:lang="en"><p>Anishchenko Sergei V. – Ph. D. (Physics and Mathematics), Leading Researcher</p><p>11, Bobruiskaya Str., 220030, Minsk </p></bio><email xlink:type="simple">sanishchenko@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>Молчанов</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Molchanov</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Молчанов Павел Валерьевич – заведующий лабораторией </p><p>ул. Бобруйская, 11, 220006, Минск </p></bio><bio xml:lang="en"><p>Molchanov Pavel V. – Head of the Laboratory </p><p>11, Bobruiskaya Str., 220030, Minsk </p></bio><email xlink:type="simple">molchanov-p-v@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт ядерных проблем Белорусского государственного университета</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Institute for Nuclear Problems of the Belarusian State University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>29</day><month>08</month><year>2026</year></pub-date><volume>70</volume><issue>4</issue><fpage>296</fpage><lpage>301</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Анищенко С.В., Молчанов П.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Анищенко С.В., Молчанов П.В.</copyright-holder><copyright-holder xml:lang="en">Anishchenko S.V., Molchanov P.V.</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://doklady.belnauka.by/jour/article/view/1321">https://doklady.belnauka.by/jour/article/view/1321</self-uri><abstract><p>Построена теория когерентного переходного излучения, генерируемого релятивистским электронным пучком, выходящим из микротрона и представляющим собой периодическую последовательность сгустков субнаносекундной длительности. В явном виде получены выражения для форм-фактора электронного пучка, а также спектрально-углового и углового распределений когерентного переходного излучения. С помощью построенной теории получены оценки микроволнового шума, испускаемого последовательностью субнаносекундных сгустков, выходящих из выводного канала микротрона.</p></abstract><trans-abstract xml:lang="en"><p>A theory of coherent transition radiation is established for a relativistic electron beam that emerges from a microtron and consists of a periodic sequence of subnanosecond bunches. Expressions for the electron beam form factor, as well as the spectral-angular and angular distributions of the coherent transition radiation, have been explicitly derived. Using this theory, estimates have been obtained for the microwave noise emitted by the sequence of subnanosecond bunches emerging from the microtron’s output channel.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>когерентное переходное излучение</kwd><kwd>релятивистские электронные сгустки</kwd><kwd>микротрон</kwd><kwd>шум</kwd></kwd-group><kwd-group xml:lang="en"><kwd>coherent transition radiation</kwd><kwd>relativistic electron bunches</kwd><kwd>microtron</kwd><kwd>noise</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">FLAP collaboration: tasks and perspectives. Study of fundamentals and new applications of controllable generation of electromagnetic radiation by relativistic electrons using functional materials / A. Baldin, A. Aryshev, A. 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