Features of the energy exchange process in a clustered argon stream at the initiation of radiation by an electron beam

The problems associated with the formation of an external cluster flow that we discov-ered earlier, which is formed in the external field of a traditional supersonic jet and is called the "cluster wake", are discussed. The reasons for the prolonged anomalous glow of the "cluster wake" are investigated. The results of a spectral study of the induced radi-ation of a supersonic clastered argon flow in the region of particle excitation (on an elec-tron beam) and beyond are presented. Anomalies in the glow of a traditional spindle-shaped jet and heavy clusters are discussed. Possible causes of the observed anomalous phenomena are presented on the basis of the above comparisons of the results obtained. The role of the energy exchange of clusters with the background gas in the afterglow of the "cluster wake" is established. The wavelengths and the corresponding transitions in ArI and ArII, which are responsible for the anomalous emission, are determined. The life-times in the excited state of particles in the central part and on the periphery of the clastered flow are determined.

supersonic jet, gas clusters, condensation process, argon, electron-beam diagnostics, in-tracluster energy exchange, «cluster wake»

Volume 23, issue 4, 2022 year

Особенности процесса энергообмена в кластированном потоке аргона при инициации излучения электронным пучком

Обсуждены проблемы, связанные с образованием обнаруженного нами ранее внешнего кластерного потока, формирующегося во внешнем поле традиционной сверхзвуковой струи и названного «кластерным следом». Исследованы причины длительного аномального свечения «кластерного следа». Представлены результа-ты спектрального исследования индуцированного излучения сверхзвукового кла-стированного потока аргона в области возбуждении частиц (на электронном пучке) и за её пределами. Обсуждены аномалии в свечении традиционной веретенообраз-ной струи и потока тяжелых кластеров. Представлены возможные причины наблю-даемых аномальных явлений на основе приведенных сравнений полученных ре-зультатов. Установлена роль энергообмена кластеров с фоновым газом в послесве-чении «кластерного следа». Определены длины волн и соответствующие переходы в ArI и ArII, обуславливающие аномальное свечение. Определены времена жизни в возбужденном состоянии частиц в центральной части и на периферии кластирован-ного потока.

сверхзвуковая струя, газовые кластеры, конденсация, аргон, электронно-пучковая диагностика, внутрикластерный энергообмен, «кластерный след»

Volume 23, issue 4, 2022 year

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