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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">22204</article-id><article-id pub-id-type="doi">10.22363/2658-4670-2019-27-2-133-142</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Modeling and Simulation</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Математическое моделирование</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">On the radiation losses during motion of an electron in the field of intense laser radiation</article-title><trans-title-group xml:lang="ru"><trans-title>Об излучательных потерях при движении электрона в поле интенсивного лазерного излучения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dobrova</surname><given-names>Ekaterina V</given-names></name><name xml:lang="ru"><surname>Доброва</surname><given-names>Екатерина Валерьевна</given-names></name></name-alternatives><bio xml:lang="en"><p>student of Institute of Physical Research and Technology</p></bio><email>dobrova03@icloud.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Milantiev</surname><given-names>Vladimir P</given-names></name><name xml:lang="ru"><surname>Милантьев</surname><given-names>Владимир Петрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor, Doctor of Physical and Mathematical Sciences, professor of Institute of Physical Research and Technology</p></bio><email>vmilant@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN university)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2019</year></pub-date><volume>27</volume><issue>2</issue><issue-title xml:lang="en">VOL 27, NO2 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 27, №2 (2019)</issue-title><fpage>133</fpage><lpage>142</lpage><history><date date-type="received" iso-8601-date="2019-11-22"><day>22</day><month>11</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Dobrova E.V., Milantiev V.P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Доброва Е.В., Милантьев В.П.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Dobrova E.V., Milantiev V.P.</copyright-holder><copyright-holder xml:lang="ru">Доброва Е.В., Милантьев В.П.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/22204">https://journals.rudn.ru/miph/article/view/22204</self-uri><abstract xml:lang="en"><p>Motion of the relativistic electron in the field of intense laser pulse of the arbitrary shape is considered. The pulse dimension is supposed to be of the order of the Gaussian laser beam dimension in the focal plane. It is supposed that the pulse is propagating along the external constant magnetic field. In the paraxial approximation the corrections of the first order to the vectors of the field of radiation as well as the force of the radiation friction are taken into account. Averaged relativistic equations of motion of electron are obtained with the help of averaging over the fast oscillations of the laser radiation. It is shown that with taking into account corrections of the first order to the field vectors an averaged force arises. This force is defined by pulsed character of radiation and proportional to the intensity but not to gradient of intensity. It is shown that radiation losses are of little importance in the transverse plane but may considerably act on the longitudinal motion of electron.</p></abstract><trans-abstract xml:lang="ru"><p>Рассмотрено движение релятивистского электрона в поле интенсивного лазерного импульса произвольной формы. Предполагается, что размер импульса имеет порядок размера гауссова лазерного луча в фокальной плоскости. Предполагается, что импульс распространяется вдоль внешнего постоянного магнитного поля. В параксиальном приближении учитываются поправки первого порядка к векторам поля излучения, а также сила трения излучения. Усредненные релятивистские уравнения движения электрона получены с помощью усреднения по быстрым колебаниям лазерного излучения. Показано, что с учетом поправок первого порядка к векторам поля возникает усредненная сила. Эта сила определяется импульсным характером излучения и пропорциональна интенсивности, а не градиенту интенсивности. Показано, что потери излучения в поперечной плоскости малозначимы, но могут существенно влиять на продольное движение электрона.</p></trans-abstract><kwd-group xml:lang="en"><kwd>relativistic electron</kwd><kwd>intense laser pulse</kwd><kwd>paraxial approximation</kwd><kwd>Gaussian beam</kwd><kwd>radiation friction</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>релятивистский электрон, интенсивный лазерный импульс, параксиальное приближение, гауссов пучок, радиационное трение</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>L. D. Landau, E. M. Lifshitz, Field theory [Teoriya polya], Nauka, Moscow, 1988, in Russian.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>J. D. Jackson, Classical electrodynamics, J. Wiley, NY-L., 1962.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>V. L. 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