E. D. Dering, K. A. Dubrovin, A. E. Zarvin, V. V. Kalyada, V. E. Khudozhitkov
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引用次数: 0
Abstract
Molecular beam mass spectrometry (MBMS) has been adapted at the gas dynamic stand LEMPUS-2 to study the free molecular beam particle-scattering process on particles of the background gas. The verification of the used technique in noncondensing flows was carried out, and the results of measuring the effective scattering cross sections of argon atoms and nitrogen molecules were compared with the known literature data. The process of atoms and small argon clusters (oligomers) scattering on carbon dioxide particles located in the background space at different average sizes of clusters 〈N〉 formed in the flow is investigated. When 〈N〉 ≈ 48, the obtained scattering cross-sections for argon atoms, dimers, and trimers is 39, 17, and 6 Å2, respectively. With an increase in the average cluster size in the flow, the effective scattering cross-section of argon atoms decreases. The paper discusses the causes of the detected effect as well as the features of MBMS use for the study of supersonic clustered jets.
采用分子束质谱法（MBMS）在气体动力站LEMPUS-2上研究了自由分子束粒子对背景气体粒子的散射过程。在非冷凝流动中对所采用的技术进行了验证，并将氩原子和氮分子的有效散射截面测量结果与已知文献数据进行了比较。研究了在流动中形成的不同平均尺寸< N >的氩气团簇的原子和小氩团簇（低聚物）在背景空间二氧化碳粒子上的散射过程。当< N >≈48时，得到的氩原子、二聚体和三聚体的散射截面分别为39、17和6 Å2。随着流动中平均团簇尺寸的增大，氩原子的有效散射截面减小。本文讨论了探测效果产生的原因以及MBMS用于超音速簇射射流研究的特点。
期刊介绍：
Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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