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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1186</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Эффект самофокусировки при вынужденном рассеянии Бриллюэна эллиптических q-гауссовых лазерных пучков в неоднородной плазме</article-title><trans-title-group xml:lang="en"><trans-title>Stimulated Brillouin Scattering of Elliptical q-Gaussian Laser Beams in Plasmas with Axial Density Ramp: Effect of Self-Focusing</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>Gupta</surname><given-names>N.</given-names></name><name name-style="western" xml:lang="en"><surname>Gupta</surname><given-names>N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Прагвара</p></bio><bio xml:lang="en"><p>Прагвара</p></bio><email xlink:type="simple">naveens222@rediffmail.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>Choudhry</surname><given-names>S.</given-names></name><name name-style="western" xml:lang="en"><surname>Choudhry</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Прагвара;</p><p>Карнал</p></bio><bio xml:lang="en"><p>Прагвара;</p><p>Карнал</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Bhardwaj</surname><given-names>S. B.</given-names></name><name name-style="western" xml:lang="en"><surname>Bhardwaj</surname><given-names>S. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Матак-Маджри, Индри, Карнал</p></bio><bio xml:lang="en"><p>Матак-Маджри, Индри, Карнал</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Пхагвары</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Университет Пхагвары</institution><country>India</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет Пхагвары;&#13;
Государственный колледж для женщин</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Университет Пхагвары;&#13;
Государственный колледж для женщин</institution><country>India</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Государственный колледж SUS</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Государственный колледж SUS</institution><country>India</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>01</day><month>12</month><year>2022</year></pub-date><volume>89</volume><issue>6</issue><fpage>899</fpage><lpage>899</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Gupta N., Choudhry S., Bhardwaj S.B., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Gupta N., Choudhry S., Bhardwaj S.B.</copyright-holder><copyright-holder xml:lang="en">Gupta N., Choudhry S., Bhardwaj S.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://zhps.ejournal.by/jour/article/view/1186">https://zhps.ejournal.by/jour/article/view/1186</self-uri><abstract><p>Теоретически исследовано вынужденное рассеяние Бриллюэна интенсивных q-гауссовых лазерных пучков, взаимодействующих с аксиально-неоднородной плазмой. Профиль плотности в форме рампы моделировал осевую неоднородность плазмы. Полагалось, что оптическая нелинейность плазмы возникает из-за зависимости релятивистской массы электронов плазмы от интенсивности излучения лазера. Интенсивный лазерный луч с частотой w0, распространяющийся через плазму, соединяется с ионно-акустической волной (IAW) на частоте wia и создает обратно рассеянную волну на частоте ws = w0 – wia. На основе вариационной теории полуаналитическое решение набора связанных волновых уравнений для волн накачки, IAW и рассеянной волны получено в приближении W.K.B. Отмечено, что на мощность рассеянной волны существенно влияет эффект самофокусировки луча накачки. </p></abstract><trans-abstract xml:lang="en"><p>Theoretical investigation on stimulated Brillouin scattering of intense q-Gaussian laser beams interacting with axially non-uniform plasmas has been presented. A ramp-shaped density profile has modelled the axial inhomogeneity of the plasma and the optical nonlinearity of the plasma has been considered to be originating owing to the dependence of the relativistic mass of the plasma electrons on laser intensity. An intense laser beam with frequency w0 propagating through plasma gets coupled with a preexisting ion acoustic wave (IAW) at frequency ωia and produces a back-scattered wave at frequency ws = w0 – wia. Using variational theory semi-analytical solution of the set of coupled wave equations for the pump, a IAW and a scattered wave have been obtained under W.K.B. approximation. It has been noted that the power of the scattered wave is significantly affected by the self-focusing effect of the pump beam. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>q-гауссов лазерный пучок</kwd><kwd>скачок плотности</kwd><kwd>релятивистская плазма</kwd><kwd>самофокусировка</kwd><kwd>стимулированное рассеяние Бриллюэна</kwd></kwd-group><kwd-group xml:lang="en"><kwd>q-Gaussian</kwd><kwd>density ramp</kwd><kwd>relativistic plasma</kwd><kwd>self-focusing</kwd><kwd>stimulated Brillouin scattering</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">R. S. Craxton, K. S. Anderson, T. R. Boehly, V. N. Goncharov, D. R. Harding, J. P. Knauer, R. L. McCrory, P. W. McKenty, D. D. Meyerhofer, J. F. Myatt, A. J. Schmitt, J. D. Sethian, R. W. Short, S. Skupsky, W. Theobald, W. L. Kruer, K. Tanaka, R. Betti, T. J. B. Collins, J. A. Delettrez, S. X. Hu, J. A. Marozas, A. V. 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