Microwave diagnostics of pulsed atmospheric discharge with electrolytic electrode and long-lived luminous formation in its afterglow  

作　　者：Shixin Zhao Xingbao Lyu Aleksandr Astafiev Chengxun Yuan Lin Miao Jingfeng Yao Ying Wang Anatoly Kudryavtsev Aleksandr Chirtsov Gennadii Shabanov Zhongxiang Zhou 

机构地区：[1]School of Physics,Harbin Institute of Technology,Harbin,China [2]Physics Department,Saint Petersburg Electrotechnical University“LETI”,St.Petersburg,Russia [3]Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology,Harbin,China [4]Physics Department,St.Petersburg State University,St.Petersburg,Russia [5]Konstantinov Petersburg Nuclear Physics Institute,National Research Centre“Kurchatov Institute”,Gatchina,Russia

出　　处：《High Voltage》2024年第1期127-136,共10页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:12175050,12205067;Fundamental Research Funds for the Central Universities,Grant/Award Number:HIT.OCEF.2022036。

摘　　要：The Gatchina discharge phenomenon holds significant promise as a laboratory model for simulating ball lightning.However,crucial aspects concerning the plasma components of the resulting afterglow remain unresolved.Notably,the measurement of the electron density,a critical parameter,has not been fully achieved thus far.In this study,microwave diagnostics and video recording were employed during a pulsed Gatchina discharge,along with synchronous measurement of discharge current and voltage.Distinct antennas were positioned at different heights to enable separate diagnosis of the discharge and the ensuing long-lived afterglow.The findings revealed that during the active phase of the Gatchina discharge,the plasma density was substantial enough to cause reflection of an electromagnetic wave with a frequency of 20 GHz from this highly conductive object.In the afterglow,the signal experienced only a moderate weakening of 10–20 percent,facilitating the determination of the time dependence of average electron density during the afterglow's passage between the two antennas.These measurements verified the unusually slow plasma decay in the afterglow of the Gatchina discharge,suggesting the potential significance of chemi-ionisation processes involving long-lived(metastable)particles.

关 键 词：holds LUMINOUS electrolytic 

分 类 号：O53[理学—等离子体物理]