radioelectronicsИзвестия высших учебных заведений России. РадиоэлектроникаJournal of the Russian Universities. Radioelectronics1993-89852658-4794Saint Petersburg Electrotechnical University10.32603/1993-8985-2023-26-3-122-135radioelectronics-766Research ArticleПРИБОРЫ И СИСТЕМЫ ИЗМЕРЕНИЯ НА ОСНОВЕ АКУСТИЧЕСКИХ, ОПТИЧЕСКИХ И РАДИОВОЛНMEASURING SYSTEMS AND INSTRUMENTS BASED ON ACOUSTIC, OPTICAL AND RADIO WAVESДиагностика атмосферных плазменных струй барьерного разряда в потоке аргона и гелия в цилиндрическом СВЧ-резонатореDiagnostics of Atmospheric Plasma Jets of Helium and Argon Barrier Discharge in a Cylindrical Microwave Cavity Resonatorhttps://orcid.org/0000-0001-7387-097XАстафьевА. М.AstafievAleksandr M.

Астафьев Александр Михайлович – кандидат физико- математических наук (2017), доцент (2020) кафедры  физики.

Автор 80 научных работ. Сфера научных интересов –  физика газового разряда; радиофизика; физика  волновых процессов.

ул. Профессора Попова, д. 5 Ф, Санкт-Петербург,  197022

Aleksandr M. Astafiev, Cand. Sci. (Phys.-Math.) (2017),  Associate Professor (2020) at the Department of Physics.

The author of 80 scientific publications. Area of  expertise: gas discharge physics; radiophysics; physics of  wave processes.

5 F, Professor Popov St., St Petersburg 197022

astafev-aleksandr@yandex.ruhttps://orcid.org/0000-0003-1912-7573АльтмаркА. М.AltmarkAleksandr M.

Альтмарк Александр Моисеевич – кандидат физико- математических наук (2005), доцент (2005) кафедры  физики.

Автор 60 научных работ. Сфера научных интересов – акустика; физика волновых процессов; физика  газового разряда.

ул. Профессора Попова, д. 5 Ф, Санкт-Петербург, 197022

Aleksandr M. Altmark, Cand. Sci. (Phys.-Math.) (2005),  Associate Professor (2005) at the Department of Physics.

The author of 60 scientific publications. Area of  expertise: acoustics; physics of wave processes; gas  discharge physics.

5 F, Professor Popov St., St Petersburg 197022

alexaltmark@gmail.comhttps://orcid.org/0000-0002-3498-8198ЛесивН. А.LesivNikita A.

Лесив Никита Андреевич – магистр (2018), ассистент  (2021) кафедры физики.

Автор 20 научных работ. Сфера научных интересов –  физика волновых процессов; физика газового  разряда.

ул. Профессора Попова, д. 5 Ф, Санкт-Петербург,  197022

Nikita A. Lesiv, Master's Degree (2018), Assistant (2021)  of the Department of Physics.

The author of 20 scientific publications. Area of  expertise: acoustics; physics of wave processes; gas  discharge physics.

5 F, Professor Popov St., St Petersburg 197022

nick.lesiv@yandex.ruhttps://orcid.org/0000-0002-7703-5469ЧирцовА. С.ChirtsovAlexander S.

Чирцов Александр Сергеевич – доктор физико- математических наук (2014), заведующий кафедрой физики.

Автор 120 научных работ. Сфера научных интересов  – фотоника; физика газового разряда.

ул. Профессора Попова, д. 5 Ф, Санкт-Петербург, 197022

Alexander S. Chirtsov, Dr Sci. (Phys.-Math.) (2014), Head  of the Department of Physics.

The author of 120 scientific publications. Area of  expertise: photonics; gas discharge physics.

5 F, Professor Popov St., St Petersburg 197022

alex_chirtsov@mail.ruСанкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)РоссияSaint Petersburg Electrotechnical UniversityRussian Federation202306072023263122135Copyright © Астафьев А.М., Альтмарк А.М., Лесив Н.А., Чирцов А.С., 20232023Астафьев А.М., Альтмарк А.М., Лесив Н.А., Чирцов А.С.Astafiev A.M., Altmark A.M., Lesiv N.A., Chirtsov A.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://re.eltech.ru/jour/article/view/766

Введение. В настоящее время активно развиваются технологии, связанные с использованием атмосферной плазмы с низкой газовой температурой. При создании новых источников низкотемпературной плазмы для конкретных приложений возникает необходимость в измерении динамических процессов в нестационарных разрядах с высоким временным разрешением. Одной из наиболее важных характеристик плазмы является концентрация электронов, которая для плазмы атмосферного давления с низкой температурой газа может быть очень небольшой. Однако доступные в настоящее время методы диагностики газоразрядной плазмы либо обладают недостаточной чувствительностью, либо не позволяют отслеживать динамические процессы в нестационарных разрядах. В этой связи представляет интерес разработка новых средств, позволяющих проводить диагностику атмосферной низкотемпературной плазмы.Цель работы. Разработка метода диагностики атмосферной плазмы с низкой температурой газа и низкой электронной концентрацией в цилиндрическом СВЧ-резонаторе.Материалы и методы. Предлагаемый метод диагностики основан на известном способе измерения сдвига частоты и добротности собственных мод СВЧ-резонатора, внутри которого находится исследуемая плазма.Результаты. Выполнена диагностика атмосферных плазменных струй барьерного разряда в потоке гелия и аргона в цилиндрическом СВЧ-резонаторе. Предложенная геометрия позволила существенно увеличить чувствительность измерений. Удалось исключить влияние эффекта поляризационного вырождения мод в круглом цилиндрическом резонаторе. Разработанная система была также апробирована на тестовых объектах с известным значением диэлектрической проницаемости.Заключение. Разработан метод СВЧ-диагностики стационарных и нестационарных холодных атмосферных плазменных струй в цилиндрическом резонаторе, внутри которого установлены передающая и приемная антенны, а также ортогональный тонкий проводник, обеспечивающий подавление нежелательных мод.

Introduction. Technologies related to the use of low-temperature atmospheric plasmas are developing at a rapid pace. Creation of new low-temperature plasma sources for specific applications requires monitoring of dynamic processes in such discharges with a high time resolution. Electron concentration is one the most important plasma characteristics, which can be very low for a low-temperature atmospheric pressure plasma. However, the methods currently available for diagnostics of gas-discharge plasmas are either characterized by insufficient sensitivity or unable to monitor dynamic processes in non-stationary discharges. In this regard, the development of new diagnostic approaches to low-temperature atmospheric plasma seems to be a relevant research direction.Aim. To develop a diagnostic method for an atmospheric plasma with a low gas temperature and a low electron concentration in a cylindrical microwave resonator.Materials and methods. The proposed diagnostic method is based on the well-known principle of measuring the frequency shift and the Q-factor of the eigenmodes of the microwave resonator, inside which the plasma under study is located.Results. Measurements of the atmospheric barrier discharge plasma jets in a helium and argon stream in a cylindrical microwave resonator were performed. The proposed geometry made it possible to significantly increase the sensitivity of measurements. It became possible to exclude the effect of polarization degeneracy in a round cylindrical resonator. The developed system was also tested on test objects with a known value of permittivity.Conclusion. A method for microwave diagnostics of stationary and non-stationary cold atmospheric plasma jets in a cylindrical resonator, inside which transmitting and receiving antennas are installed, as well as an orthogonal thin conductor preventing the excitation of undesirable modes, was developed.

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The authors declare that there are no conflicts of interest present.