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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">nguphys</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский физический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>SIBERIAN JOURNAL OF PHYSICS</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9447</issn><publisher><publisher-name>Новосибирский государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25205/2541-9447-2022-17-2-16-29</article-id><article-id custom-type="elpub" pub-id-type="custom">nguphys-189</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 ВЫСОКИХ ЭНЕРГИЙ, УСКОРИТЕЛЕЙ И ВЫСОКОТЕМПЕРАТУРНОЙ ПЛАЗМЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HIGH-ENERGY AND ACCELERATOR PHYSICS, PHYSICS OF HIGH-TEMPERATURE PLASMA</subject></subj-group></article-categories><title-group><article-title>Исследование инкремента поперечной неустойчивости килоамперного электронного пучка в ЛИУ для его применения в терагерцовом ЛСЭ</article-title><trans-title-group xml:lang="en"><trans-title>Investigation of the Increment of Transverse Instability of a Kiloampere Electron Beam in a Linear Induction Accelerator for Its Use in a Terahertz FEL</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>Сандалов</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sandalov</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сандалов Евгений Сергеевич, аспирант</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Evgeniy S. Sandalov, postgraduate student </p><p>Novosibirsk</p></bio><email xlink:type="simple">E.S.Sandalov@inp.nsk.su</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>Синицкий</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Sinitsky</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Синицкий Станислав Леонидович, кандидат физико-математических наук </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Stanislav L. Sinitsky, Candidate of Physical and Mathematical Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">S.L.Sinitsky@inp.nsk.su</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>Сковородин</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Skovorodin</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сковородин Дмитрий Иванович, кандидат физико-математических наук </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Dmitrii I. Skovorodin, Candidate of Physical and Mathematical Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">Skovorodin@inp.nsk.su</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>Аржанников</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Arzhannikov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аржанников Андрей Васильевич, доктор физико-математических наук </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Andrey V. Arzhannikov, Doctor of Physical and Mathematical Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">A.V.Arzhannikov@inp.nsk.su</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>Логачев</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Logachev</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Логачев Павел Владимир, доктор физико-математических наук, академик РАН </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Pavel V. Logachev, Doctor of Physical and Mathematical Sciences, Academician of the Russian Academy of Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">P.V.Logatchov@inp.nsk.su</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>Бак</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bak</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бак Петр Алексеевич, старший научный сотрудник </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Petr A. Bak, Senior Researcher </p><p>Novosibirsk</p></bio><email xlink:type="simple">P.A.Bak@inp.nsk.su</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>Живанков</surname><given-names>К. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhivankov</surname><given-names>K. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Живанков Кирилл Игоревич, научный сотрудник </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Kirill I. Zhivankov, researcher </p><p>Novosibirsk</p></bio><email xlink:type="simple">K.I.Zhivankov@inp.nsk.su</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>Никифоров</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikiforov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Никифоров Данила Алексеевич, научный сотрудник </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Danila A. Nikiforov, researcher </p><p>Novosibirsk</p></bio><email xlink:type="simple">D.A.Nikiforov@inp.nsk.su</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>Петренко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Петренко Алексей Васильевич, кандидат физико-математических наук </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Alexey V. Petrenko, Candidate of Physical and Mathematical Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">A.V.Petrenko@inp.nsk.su</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>Гинзбург</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ginzburg</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гинзбург Наум Самуилович, доктор физико-математических наук, член-корреспондент РАН </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Naum S. Ginzburg, Doctor of Physical and Mathematical Sciences, corresponding member of the Russian Academy of Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">ginzburg@appl.sci-nnov.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>Песков</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Peskov</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Песков Николай Юрьевич, доктор физико-математических наук </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Nikolai Yu. Peskov, Doctor of Physical and Mathematical Sciences </p><p>Novosibirsk</p></bio><email xlink:type="simple">peskov@appl.sci-nnov.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>Протас</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Protas</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Протас Роман Викторович, кандидат физико-математических наук </p><p>Снежинск</p></bio><bio xml:lang="en"><p>Roman V. Protas, Candidate of Physical and Mathematical Sciences </p><p>Snezhinsk</p></bio><email xlink:type="simple">vniitf@vniitf.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт ядерной физики им. Г. И. Будкера СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Budker Institute of Nuclear Physics SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский федеральный ядерный центр – Всероссийский научно-исследовательский институт технической физики имени академика Е. И. Забабахина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Federal Nuclear Centre — The All-Russian Research Institute of Technical Physics named after E. I. Zababakhin</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>11</day><month>09</month><year>2022</year></pub-date><volume>17</volume><issue>2</issue><fpage>16</fpage><lpage>29</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сандалов Е.С., Синицкий С.Л., Сковородин Д.И., Аржанников А.В., Логачев П.В., Бак П.А., Живанков К.И., Никифоров Д.А., Петренко А.В., Гинзбург Н.С., Песков Н.Ю., Протас Р.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Сандалов Е.С., Синицкий С.Л., Сковородин Д.И., Аржанников А.В., Логачев П.В., Бак П.А., Живанков К.И., Никифоров Д.А., Петренко А.В., Гинзбург Н.С., Песков Н.Ю., Протас Р.В.</copyright-holder><copyright-holder xml:lang="en">Sandalov E.S., Sinitsky S.L., Skovorodin D.I., Arzhannikov A.V., Logachev P.V., Bak P.A., Zhivankov K.I., Nikiforov D.A., Petrenko A.V., Ginzburg N.S., Peskov N.Y., Protas R.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://nguphys.elpub.ru/jour/article/view/189">https://nguphys.elpub.ru/jour/article/view/189</self-uri><abstract><p>В ИЯФ СО РАН совместно с РФЯЦ ВНИИТФ ведутся исследования, направленные на получение в линейном индукционном ускорителе (ЛИУ) пучка релятивистских электронов с энергией до 20 МэВ, током до 2 кА и длительностью до 200 нс при нормализованном эмиттансе около 1000 π⋅мм⋅мрад. Генерация электронных пучков с такими параметрами требует тщательного исследования всех основных источников возмущений траекторий электронов пучка, создаваемых различного рода неустойчивостями, возникающими при транспортировке и ускорении сильноточного пучка в ускорительной структуре ЛИУ. Для проведения экспериментальной серии по измерению динамики поперечных колебаний пучка был использован набор быстрых трансформаторов тока, применяемых для регистрации тока пучка и полей мод, возбуждаемых этим пучком в структуре. Данные измерения проведены при прохождении в структуре пучка электронов с энергией 8,5 МэВ и током 1 кА в различных режимах по величине фокусирующих магнитных полей в ЛИУ. В результате проведенных измерений были зарегистрированы колебания электромагнитного поля собственных мод в ускорительных модулях ЛИУ, и была установлена зависимость амплитуды колебаний ЭМ-поля этих мод от номера ускорительного модуля. Эта зависимость была сопоставлена с результатом моделирования динамики развития поперечной неустойчивости в ЛИУ, которое проведено с использованием созданного программного комплекса, что в итоге позволило определить величину инкремента поперечной неустойчивости релятивистского электронного пучка в данных экспериментальных условиях. Исходя из полученных результатов проведен анализ возможности использования пучка, генерируемого ЛИУ, в качестве драйвера ЛСЭ-генератора когерентных импульсов ТГц-излучения в диапазоне частот 0,3–1,2 ТГц с субгигаваттным уровнем мощности.</p></abstract><trans-abstract xml:lang="en"><p>The Institute of Nuclear Physics SB RAS in cooperation with the Russian Federal Nuclear Center VNIITF performs a series of researches aimed at acquiring a relative electron beam with energy up to 20 MeV, current up to 2 kA, and duration up to 200 ns at normalized emittance ca. 1000 π∙mm∙rad in a linear induction accelerator (LIA). In order to generate electron beams with such parameters we require thorough investigation of all main sources of perturbation of electron beam trajectory caused by different instabilities that occur during the transport and acceleration of a high currency beam in the accelerating structure of LIA. For the experimental series on measuring the dynamics of transverse oscillation of a beam, we applied a set of fast current transformers which are used for registration of beam current and mode fields caused by this beam in the structure. These measurements were performed for the electron beam with the energy of 8.5 MeV and current of 1 kA going through the structure at different modes of focusing magnetic fields size in LIA. As a result, we registered oscillation of the electromagnetic field of normal modes in the accelerating modules of LIA, as well as we determined the dependence of the oscillation amplitude of these modes’ EM field on the number of accelerating module. This dependence was compared with the result of modeling of development dynamics of transverse instability in LIA that was performed using the created program system. This allowed us to determine the size of the increment of transverse instability of a relativistic electron beam under the given experimental conditions. Based on the acquired results, we made the analysis of possibility to use the beam generated in ILA as a driver for the FEL generator of coherent impulses of THz radiation within the frequency range of 0.3–1.2 THz with a sub-gigawatt level of power.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>линейный индукционный ускоритель</kwd><kwd>сильноточный релятивистский электронный пучок</kwd><kwd>поперечная неустойчивость пучка</kwd><kwd>ускорительный модуль</kwd><kwd>дипольные колебания</kwd><kwd>терагерцовый ЛСЭ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>linear induction accelerator</kwd><kwd>high-current relativistic electron beam</kwd><kwd>transverse beam instability</kwd><kwd>accelerating module</kwd><kwd>dipole oscillation</kwd><kwd>terahertz FEL</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Основная доля исследований проведена в ИЯФ СО РАН: работы, описанные в разделе 3, частично выполнены за счет средств гранта Российского научного фонда (грант № 19–12– 00212). Эксперименты по генерации в ЛИУ пучка электронов с током 1 кА энергией 8,5 МэВ проводились в коллаборации с РФЯЦ ВНИИТФ. Авторы выражают искреннюю благодарность А. В. Бурдакову, Н. А. Винокурову, В. Н. Волкову и Е. К. Кенжебулатову за полезные замечания и обсуждения в ходе проведения исследований.</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">Nikiforov D. A., Blinov M. F., Fedorov V. V. et al. High-Current Electron-Beam Transport in the LIA-5 Linear Induction Accelerator. Phys. Part. Nuclei Lett. 17, 2020, p. 197–203. DOI 10.1134/S1547477120020156.</mixed-citation><mixed-citation xml:lang="en">Nikiforov D. A., Blinov M. F., Fedorov V. V. et al. High-Current Electron-Beam Transport in the LIA-5 Linear Induction Accelerator. Phys. Part. Nuclei Lett. 17, 2020, p. 197–203. 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