Article
Physics, Fluids & Plasmas
C. McDonnell, R. Irwin, S. White, W. G. Graham, D. Riley
Summary: This paper experimentally characterizes a pure helium atmospheric pressure plasma jet using various optical diagnostics. The results reveal the variation of electric field and sensitivity to gas mixing in the plasma, as well as estimate the excited state densities.
JOURNAL OF PLASMA PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Wenyuan Zhang, Haojun Xu, Xiaolong Wei, Pei Feng
Summary: To overcome drawbacks in plasma stealth technology, a composite absorbing structure composed of a closed plasma and a phase gradient metasurface (PGM) is proposed. The designed PGM allows for broadband reflective polarization conversion and can generate an abnormal reflection angle. By combining the designed PGM with the plasma structure, the wave-absorbing properties of the plasma are improved.
PHYSICS OF PLASMAS
(2023)
Article
Engineering, Electrical & Electronic
Wenchong OuYang, Qi Liu, Wenzhe Mao, Shuzhan Gao, Zhengwei Wu
Summary: This article investigates the terahertz wave propagation characteristics in atmospheric-pressure plasma jet (APPJ) through joint simulation and experimental measurements. The results show good agreement between the measured and simulated data, and demonstrate the dominant role of absorption effect in terahertz wave attenuation in APPJ. The developed simulation model and THz interferometer method have significant implications for ground test verification of reentry communication schemes.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Physics, Fluids & Plasmas
K. Rasek, F. X. Bronold, H. Fehske
Summary: This study investigates the self-consistent ambipolar charge kinetics across a negatively biased semiconducting plasma-solid interface. By calculating and visualizing, the study shows that the current-voltage characteristic is influenced by the electron microphysics of the semiconductor, indicating that the perfect absorber model commonly used for plasma-solid interfaces cannot be maintained for semiconducting interfaces.
Article
Thermodynamics
L. Cheng, N. Barleon, B. Cuenot, O. Vermorel, A. Bourdon
Summary: This paper presents the research progress on plasma assisted combustion, focusing on key aspects such as fast gas heating, slow gas heating, and radical production. An incremental methodology is used to build a single plasma mechanism, and its validity is verified through experimental validation. The rates of critical reactions for nitrogen quenching are discussed, and the mechanism is simplified for multi-dimensional simulations.
COMBUSTION AND FLAME
(2022)
Editorial Material
Environmental Sciences
R. Ramirez-Vazquez, I Escobar, F. Vargas, E. Arribas
Summary: This article discusses a recent study by Lopez et al., 2020 (Lopez et al., 2021) that aims to explore the possible relationship between exposure to RF-EMF and health indicators such as sleep, headache, and fatigue. The study collected data through surveys and measured maximum electromagnetic radiation peak-to-peak. After a detailed analysis, the authors provide some comments to clarify certain aspects of the publication.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Chenglong Jia, Penghao Chu, Wenbin Zhao, Zhong Tang
Summary: This study focuses on understanding the characteristics of internal discharge shock waves in gas-insulated switchgears (GISs). Using state-of-the-art experimental techniques, such as high-speed shadowgraphy, the authors have investigated the phenomenon of shock waves induced by gas discharge in GISs, and extensively assessed various thermodynamic parameters of interest.
IET GENERATION TRANSMISSION & DISTRIBUTION
(2023)
Article
Optics
Muhammad Usman Shahid, Abdul Ghaffar, Majeed A. S. Alkanhal, Yasin Khan
Summary: This manuscript investigates electromagnetic wave propagation in graphene-wrapped circular waveguides filled with magnetized plasma. The results demonstrate that graphene conductivity significantly influences electromagnetic wave propagation in the proposed design. The study of normalized propagation constant and attenuation phase constant under different parameter values shows distinct variations, with potential applications in communication, optical sensing, and cancer treatment at specific plasma frequencies.
Article
Energy & Fuels
Yanlin Su, Wei Zhou, Junfeng Li, Jihui Gao, Pengxiang Wang, Guangbo Zhao, Yukun Qin
Summary: This study demonstrates that microwave technology can significantly enhance flame combustion by generating plasma during the combustion process. The carbonization temperature and particle size of coke are identified as the main factors influencing the formation of centimeter-scale plasma. The production of CO is found to be correlated with microwave discharge. This research provides new insights into the microwave enhancement mechanism in gas-solid heterogeneous reactions.
Article
Physics, Multidisciplinary
Zhaoying Wang, Lixin Guo, Jiangting Li
Summary: The research analyzed the attenuation characteristics of obliquely incident electromagnetic waves in weakly ionized dusty plasma in the L-Ka frequency band. It was found that the minimum electron velocity and the second term of the collision cross-section have an impact on the attenuation characteristics, and that the trends remained consistent when the dust density and radius were changed.
Article
Physics, Fluids & Plasmas
Hao Liang, Jiangting Li, Lixin Guo, Linjing Guo, Wei Liu, Zhongyu Liu
Summary: Plasma shock waves are high-speed and nonlinear motion states of plasma with dramatic variations in fluid parameters within a limited space, making the study of electromagnetic wave propagation difficult. In this study, we calculated the spatial distribution of plasma frequency and collision frequency in the plasma shock layer based on its one-dimensional structure. We also used a method to calculate electromagnetic wave propagation in the plasma shock layer and found that the absorption of electromagnetic waves decreases with increasing frequency. The modulation phenomenon occurs in the shock layer due to the nonlinear effects of electromagnetic processes in plasmas.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Multidisciplinary
Deng Zhou, Yue Ming, Jinfang Wang, Chenxiao Gan
Summary: The paper discusses the situation of equilibrium electric field in magnetized plasmas and its impact on wave propagation. The study found that the presence of a transverse equilibrium electric field can drastically change the wave propagation when the wave frequency is close to the plasma Langmuir frequency.
Article
Physics, Applied
Matthew C. Paliwoda, Joshua L. Rovey
Summary: Plasma photonic crystals (PPCs) are photonic crystals formed from plasma that allow for electrically tunable structure and permittivity. This work demonstrates for the first time that individual control of plasma columns can tune a PPC bandgap frequency by an order of magnitude, expanding the frequency variability and potential applications of PPCs as wideband tunable bandgap devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Paul Song, Jiannan Tu, Bodo W. Reinisch, Ivan A. Galkin, William R. Johnston
Summary: Using the Fresnel zone construction theory, we investigate the whistler-mode radiation from a dipole antenna in a cold magnetized plasma. Interference between radiated waves from different propagation directions leads to regions of enhanced waves in space. The coherently enhanced wave propagates at the group velocity. When the antenna is perpendicular to the background magnetic field, the strong waves form two back-to-back parabolic-shaped cones along the magnetic field. The power within each cone decreases with distance at a slower rate than a spherical wave in vacuum. The total radiation can be estimated by integrating the total energy flux over the Fresnel zone. The derived radiation resistance is greater than that in vacuum, and is proportional to the frequency and the square of the antenna length. Contrary to previous theoretical studies, a longer antenna is preferred for increasing power radiation.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Fluids & Plasmas
G. Liziakin, A. Oiler, A. Gavrikov, N. Antonov, V. Smirnov
Summary: This paper explores the possibility of controlling the electrostatic field distribution in plasma for the advancement of modern technologies. It focuses on the influence of magnetic fields and electrode arrangements in an axisymmetric system on plasma properties, proposing solutions and conducting experimental verification.
JOURNAL OF PLASMA PHYSICS
(2021)
