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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-1765</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>Увеличение воспроизводимости и усиление аналитического сигнала в фемтосекундной двухимпульсной лазерно-искровой эмиссионной спектроскопии</article-title><trans-title-group xml:lang="en"><trans-title>SIGNAL ENHANCEMENT AND REPRODUCIBILITY IMPROVEMENT IN DOUBLE-PULSE FEMTOSECOND-LASER-INDUCED BREAKDOWN SPECTROSCOPY</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>Zhu</surname><given-names>Y.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhu</surname><given-names>Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мяньян</p></bio><bio xml:lang="en"><p>Mianyang</p></bio><email xlink:type="simple">zhuyu_pku@pku.edu.cn</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>Zhou</surname><given-names>P.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhou</surname><given-names>P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мяньян</p></bio><bio xml:lang="en"><p>Mianyang</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Li</surname><given-names>S.</given-names></name><name name-style="western" xml:lang="en"><surname>Li</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мяньян</p></bio><bio xml:lang="en"><p>Mianyang</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики жидкости, Китайская академия инженерной физики</institution></aff><aff xml:lang="en"><institution>Institute of Fluid Physics, China Academy of Engineering Physics</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2025</year></pub-date><volume>92</volume><issue>1</issue><fpage>126</fpage><lpage>126</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Zhu Y., Zhou P., Li S., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Zhu Y., Zhou P., Li S.</copyright-holder><copyright-holder xml:lang="en">Zhu Y., Zhou P., Li S.</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/1765">https://zhps.ejournal.by/jour/article/view/1765</self-uri><abstract><p>Метод оптимизации глубины фокусировки предложен для усиления сигнала и воспроизводимости в коллинеарной двухимпульсной фемтосекундной лазерно-искровой эмиссионной спектроскопии. Метод основан на оптимизации глубины фокусировки второго импульса. Спектральная интенсивность сигнала показала стабильное усиление с коэффициентом усиления ~3, воспроизводимость сигнала показала минимальные колебания, когда глубина фокусировки второго импульса находилась в диапазоне 0—2 мм ниже поверхности образца. Обсуждаются возможные механизмы, лежащие в основе усиления сигнала и улучшения воспроизводимости, на основе измеренной температуры плазмы и электронной плотности. </p></abstract><trans-abstract xml:lang="en"><p>A focus depth optimization method was proposed for signal enhancement and reproducibility improvement in pump-probe collinear double-pulse femtosecond laser-induced breakdown spectroscopy. This method was based on the optimization of the focus depth of the second pulse. The spectral signal intensity showed a stable enhancement with an enhancement factor of ~3, and the signal reproducibility exhibited minimal fluctuations when the focus depth of the second pulse was within the range of 0–2 mm below the sample surface. Additionally, the possible mechanisms behind the observed signal enhancement and improvement in reproducibility were discussed based on the measured plasma temperature and electron density. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерно-искровая эмиссионная спектроскопия</kwd><kwd>двухимпульсная фемтосекундная лазерно-искровая эмиссионная спектроскопия</kwd><kwd>усиление сигнала</kwd><kwd>улучшение воспроизводимости</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser-induced breakdown spectroscopy</kwd><kwd>double-pulse femtosecond laser-induced breakdown spectroscopy</kwd><kwd>signal enhancement</kwd><kwd>reproducibility improvement</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the National Natural Science Foundation of China (Nos. 12102408, 12275258).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">H. 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