Article
Physics, Fluids & Plasmas
A. Saifutdinov, S. S. Sysoev
Summary: This study investigates the plasma parameters and kinetics of fast electrons in the negative glow region of a discharge with a microhollow cathode at high pressures using a hybrid model. The hybrid model combines a kinetic description of electrons and a fluid description of the heavy plasma component. The results of numerical calculations are compared with probe studies, and it is found that the hybrid model accurately describes the formation of electron energy distribution function peaks. The numerical calculations also allow for the prediction of negative glow plasma parameters in different gas mixtures.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Pengying Jia, Kun Gao, Shuai Zhou, Junyu Chen, Jiacun Wu, Kaiyue Wu, Xuechen Li
Summary: This study investigates self-deformation of an atmospheric pressure diffuse discharge initiated between a needle anode and a water cathode, showing a morphological transition from a cone to asymmetric shapes over time. The pH value and electrical conductivity of the water cathode vary during this process. The electrical measurements indicate that the different discharge morphologies may have different formation mechanisms, with conical discharge showing time-invariant behavior while the other two discharges exhibit periodic pulsing. Visual results show that the different discharge morphologies belong to a glow discharge regime, with each type consisting of stationary or moving micro-discharges.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Jinbao Liu, Dongheyu Zhang, Yangyang Fu
Summary: This study reports on the formation of multiple-core structures in laser-sustained plasmas and demonstrates the relationship between these structures and factors such as laser power, radiation, and diffusion.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Zutao Wang, Chuan Li, Menghan Xiao, Pengyu Wang, Ming Zhang, Peng Shi, Jiawei Li, Dingchen Li, Fuyou He, Wendi Yang, Yong Yang, Kexun Yu, Yuan Pan
Summary: This study investigates the coalescence of droplets on the discharge electrode surface in high humidity environments and explores the counterflow phenomenon of droplets using corona discharge in a needle-plate electrode. The results show that the number of coalesced droplets reaches its maximum at specific conditions, and the size of the attached droplet depends on the balance of coalescence and evaporation. Coalescence is mainly influenced by the dielectrophoretic force caused by the high electric field gradient, while evaporation is related to the ionic wind generated by the corona discharge. The counterflow phenomenon of droplets is speculated to be driven by the high concentration gradient of positive ions near the needle electrode and repulsive forces from electrons and negative ions below the needle tip.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
N. V. Landl, Yu. D. Korolev, I. V. Lopatin, O. V. Krysina, O. B. Frants, G. A. Argunov
Summary: This paper presents research into the low-pressure hollow-cathode and hollow-anode glow discharge, proposing a model to explain the plasma maintenance mechanisms in the hollow anode. The estimated plasma parameters in the hollow anode are in good agreement with experimental data, showing that the theoretical calculations are accurate.
RUSSIAN PHYSICS JOURNAL
(2021)
Article
Chemistry, Physical
Fengwei Bai, Yan Li, Ziyu Chen, Yongchao Zhou, Chengzong Li, Tao Li
Summary: This study demonstrates the targeted stabilization of solid electrolyte interphase (SEI) and cathode electrolyte interphase (CEI) in high-voltage lithium-metal batteries by asymmetrically sustained-releasing different additives. The strategy successfully addresses issues like dendrites growth, parasitic side reactions, and transition metals dissolution under high-voltage, resulting in a high capacity retention rate.
JOURNAL OF POWER SOURCES
(2022)
Review
Chemistry, Multidisciplinary
Xiaoxu Peng, Zheng Wang
Summary: The article provides an overview of the development of solution electrode glow discharge (SEGD) in various fields and discusses its discharge mechanism. SEGD has unique advantages for optical emission spectrometry and mass spectrometry, and it has broad research potential in biology and medicine, material synthesis, electrochemistry, etc.
CHINESE CHEMICAL LETTERS
(2022)
Article
Physics, Multidisciplinary
N. Landl, Y. D. Korolev, A. Kozyrev, I. Lopatin
Summary: The results of the investigation on a low-pressure glow discharge with a hollow cathode and a large-volume hollow anode in argon and nitrogen are presented. The data on plasma density and electron temperature are obtained. A model describing the mechanisms of plasma sustainment in a hollow anode, which includes the non-uniformity of plasma density distribution in the anode cavity, is proposed. Estimations of the plasma parameters are made and the model is found to be in good agreement with the experimental data.
RUSSIAN PHYSICS JOURNAL
(2022)
Article
Chemistry, Applied
Krzysztof Greda, Pawel Pohl
Summary: A new method of optical emission spectrometry (OES) using micmplasma source was developed for the determination of Na, K, Mg, Ca, and Zn in wine, without the need for acid digestion. The study also found that red wines have higher levels of K and Mg, and different grape varieties can be distinguished based on the concentrations of K and Ca.
Article
Physics, Fluids & Plasmas
S. I. Moshkunov, K. I. Romanov, V. Yu. Khomich, E. A. Shershunova
Summary: This study focuses on investigating the electrical characteristics of a microhollow cathode discharge in air at atmospheric pressure. Experimental results show that the discharge operates in a self-pulsing mode with an average current ranging from hundreds of microamperes to units of milliamperes. It is also observed that the self-pulsing frequency is linearly dependent on the consumed current. Ignition voltage values of the self-pulsing microhollow cathode discharge for different hole diameters (200-500 μm) are obtained.
PLASMA PHYSICS REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Shikha Misra, Akhilesh Mishra, Ram Prakash Lamba, Bharat Lal Meena, Alok Mishra, Udit Narayan Pal
Summary: In this study, a comparative analysis of various geometrical parameters has been conducted for a single gap multiaperture pseudospark switch (PSS) using the 2-D axis-symmetric kinetic simulation tool COMSOL Multiphysics. The results demonstrate the significant impact of multiple apertures, baffles, and chicane on the performance of PSS, including axial, radial, and transient discharge behavior as well as penetrating potential. It is found that the single gap geometry of PSS with multiaperture, baffle, and chicane provides fast switching, higher holdoff, higher current carrying capability, and longer lifespan due to reduced erosion.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Nanoscience & Nanotechnology
Dandan Zou, Hanyu Pan, M. Hasnain Qaisrani
Summary: This paper investigates the breakdown characteristics of partial discharge through experiments, revealing that the breakdown voltage increases with the increase in spacing between the needle and plate. However, both experimental and simulation results show slight discrepancies from theoretical predictions.
Article
Spectroscopy
Zhaoqing Cai, Zheng Wang
Summary: The use of solution anode glow discharge (SAGD) in hydrogen-helium mixture was evaluated for optical emission spectrometry (OES) of arsenic (As) in solution. The enclosed structure and non-electrode hollow channel were adopted to integrate the functions of vapor generation, atomization, and excitation of As. The study found that propionic acid had the best amplification effect, and the detection limit of SAGD-OES for As was better than that of the fully open-to-air discharge system. SAGD was more susceptible to chemical interferences induced by transition metal elements compared to alkali metals and alkaline earth metals.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Physics, Fluids & Plasmas
V. V. Lisenkov, Yu Mamontov
Summary: This study compares the dynamics of electron avalanches starting from the flat cathode surface and from microtips of different heights, showing that avalanches starting from microtips have advantages in terms of electron number increase and distance traveled. The enhanced electric field region produced by microtips can create initial plasma density inhomogeneities necessary for instability during cathode sheath formation. Possible mechanisms of instability development in the cathode sheath are analyzed.
PLASMA PHYSICS REPORTS
(2021)
Article
Chemistry, Analytical
Meng Zhang, Qingsong Tang, Peixia Li, Lin He, Xiandeng Hou, Xiaoming Jiang
Summary: A new compact tandem excitation source was designed and constructed using an array point discharge microplasma for a miniaturized optical emission spectrometer. The ArrPD microplasma consisted of three pairs of point discharges arranged in sequence in a narrow discharge chamber, which significantly improved the excitation capability and efficiency. The proposed ArrPD source was compared to a commonly used microplasma source and showed 3-6-fold improvement in analytical sensitivities for seven elements.
ANALYTICAL CHEMISTRY
(2023)
Article
Physics, Applied
Shoujie He, Jianxun Zhao, Jing Ha, Xiaoxian Zhang, Xiwang Zhang, Huiling Bao, Qing Li
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Applied
Shoujie He, Jiasong Deng, Yinyin Qiao, Qing Li, Lifang Dong
Summary: This study experimentally and numerically investigated the effects of a second anode with different geometries on the micro-hollow cathode sustained discharge (MCSD) in helium. The results showed that using needles inserted into the plate as the second anode promoted the formation of MCSD and allowed for MCSD at a low cathode current. The distribution of needles also had a significant impact on MCSD formation.
JOURNAL OF APPLIED PHYSICS
(2023)
