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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="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Plasma Physics Reports</journal-id><journal-title-group><journal-title xml:lang="en">Plasma Physics Reports</journal-title><trans-title-group xml:lang="ru"><trans-title>Физика плазмы</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0367-2921</issn><issn publication-format="electronic">3034-6371</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">668786</article-id><article-id pub-id-type="doi">10.31857/S0367292124040091</article-id><article-id pub-id-type="edn">QDDEGY</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>TOKAMAKS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ТОКАМАКИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Study of the Method of Photon Neutralization of Powerful Beams of Negative Ions at the Budker Institute of Nuclear Physics</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование метода фотонной нейтрализации мощных пучков отрицательных ионов в ИЯФ СО РАН</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>S. S.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>С. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Atlukhanov</surname><given-names>M. G.</given-names></name><name xml:lang="ru"><surname>Атлуханов</surname><given-names>М. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Burdakov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Бурдаков</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kurkuchekov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Куркучеков</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sanin</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Санин</surname><given-names>А. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Skovorodin</surname><given-names>D. I.</given-names></name><name xml:lang="ru"><surname>Сковородин</surname><given-names>Д. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Trunev</surname><given-names>Y. A.</given-names></name><name xml:lang="ru"><surname>Трунев</surname><given-names>Ю. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shikhovtsev</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Шиховцев</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>s.s.popov@inp.nsk.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт ядерной физики им. Г.И. Будкера Сибирского отделения РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Novosibirsk State University</institution></aff><aff><institution xml:lang="ru">Новосибирский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Novosibirsk State Technical University</institution></aff><aff><institution xml:lang="ru">Новосибирский государственный технический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-11-27" publication-format="electronic"><day>27</day><month>11</month><year>2024</year></pub-date><volume>50</volume><issue>4</issue><issue-title xml:lang="ru"/><fpage>491</fpage><lpage>501</lpage><history><date date-type="received" iso-8601-date="2025-02-27"><day>27</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0367-2921/article/view/668786">https://journals.eco-vector.com/0367-2921/article/view/668786</self-uri><abstract xml:lang="en"><p>A short review of the studies carried out at the Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences (BINP SB RAS) on the photon neutralization of the beams of negative ions is presented. The principal distinctive feature of the presented approach consists in the nonresonant accumulation of photons in a limited space. Their confinement is based on the adiabatic motion of photons in a system of concave mirrors, which is insensitive to the quality of the injected radiation. An analysis is carried out of the possibility of using the neutralizer based on such a nonresonant photon trap in large-scale installations such as ITER and TRT, and a future experiment is described on the photon neutralization using a beam of negative hydrogen ions with energy up to 130 keV and a current of about 10 mA.</p></abstract><trans-abstract xml:lang="ru"><p>Представлен краткий обзор исследований, проводимых в ИЯФ СО РАН по теме фотонной нейтрализации пучков отрицательных ионов. Принципиальное отличие представленного подхода в нерезонансном накоплении фотонов в ограниченном пространстве. Удержание основано на адиабатическом движении фотонов в системе вогнутых зеркал, которое нечувствительно к качеству инжектируемого излучения. Проведен анализ перспектив нейтрализатора на основе нерезонансной фотонной ловушки в крупномасштабных установках типа ИТЭР и ТРТ, а также описан подготавливаемый эксперимент по фотонной нейтрализации на пучке отрицательных ионов водорода с энергией до 130 кэВ, током около 10 мА.</p></trans-abstract><kwd-group xml:lang="en"><kwd>photoneutralization</kwd><kwd>nonresonant photon trap</kwd><kwd>adiabatic invariants</kwd><kwd>optical fiber laser</kwd><kwd>ITER</kwd><kwd>TRT</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>фотонейтрализация</kwd><kwd>нерезонансный фотонный накопитель</kwd><kwd>адиабатические инварианты</kwd><kwd>волоконный лазер</kwd><kwd>ИТЭР</kwd><kwd>ТРТ</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hemsworth R., Decamps H., Graceffa J., Schunke B., Tanaka M., Dremel M., Tanga A., De Esch H.P.L., Geli F., Milnes J., Inoue T., Marcuzzi D., Sonato P. and Zaccaria P. // Nucl. 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