Article
Chemistry, Physical
Mengqi Liu, Shuang Xia, Wenjian Wan, Jun Qin, Hua Li, Changying Zhao, Lei Bi, Cheng-Wei Qiu
Summary: Using doped InAs multilayers under moderate external magnetic fields with gradient epsilon-near-zero frequencies, broadband non-reciprocal absorption that can be tailored within the mid-infrared spectral region has been demonstrated. The study of magneto-optical absorption has stimulated diverse energy-technology-related explorations, showing potential in breaking the current theoretical efficiency limits of energy devices compared with reciprocal counterparts. However, experimentally realizing strong infrared non-reciprocal absorption remains an open challenge, and existing proposals of non-reciprocal absorbers are restricted to a narrow working waveband.
Article
Engineering, Chemical
Petr Kloc, Vladimir Aubrecht, Milada Bartlova, Roman Fuchs
Summary: Mean Absorption Coefficients (MACs) offer a suitable method for calculating radiation transfer in complex geometries, reducing computation power and time requirements. This study evaluates the accuracy of three different MAC methods in various pressure conditions, suggesting the hybrid MAC method as the most universal option for radiation evaluation.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2023)
Article
Environmental Sciences
Zhaolun Cui, Yi Li, Song Xiao, Shuanngshuang Tian, Ju Tang, Yanpeng Hao, Xiaoxing Zhang
Summary: This paper comprehensively reviews the recent progress in SF6 emission reduction approaches. The use and emission of SF6 are still on the rise, mainly concentrated in the power industry. Restrictive use and emission reduction policies are not well promoted in developing economies. More specific policies and regulations are needed, along with accurate assessments of SF6 atmospheric properties and emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Nanoscience & Nanotechnology
Xiaohu Wu, Haiyan Yu, Feng Wu, Biyuan Wu
Summary: Recent studies have shown the potential of Weyl semimetals in verifying Kirchhoff's law, but current designs fall short in achieving perfect nonreciprocal radiation. A new design using attenuated total reflection demonstrates perfect nonreciprocal radiation at a shorter wavelength and smaller angle, with a significant difference in directional emissivity and absorptivity. This design shows promise in experimenting with nonreciprocal materials and Kirchhoff's law.
Article
Thermodynamics
G. C. Fraga, P. J. Coelho, F. H. R. Franca
Summary: This study investigates turbulence-radiation interaction using transient data from high-resolution large eddy simulations. Turbulent fluctuations lead to an increase in both mean emission and absorption, particularly in the hot gas plume region. Temperature autocorrelation is identified as the most important correlation in the time-averaged emission term.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Fluids & Plasmas
A. Bogatskaya, E. A. Volkova, A. M. Popov
Summary: An alternative method is used to generate highly unipolar terahertz pulses, based on the nonuniform amplification of seed ultrashort carrier-envelope phase pulses in nonequilibrium plasma of air or nitrogen. The obtained results involve a self-consistent solution of the second-order wave equation and kinetic Boltzmann equation for electron velocity distribution function relaxation.
Article
Physics, Fluids & Plasmas
Lin Wang, Huaguang Bao, Dazhi Ding, Rushan Chen
Summary: This study analyzes the multi-carrier microwave breakdown in air-SF6 mixtures using the spectral-element time-domain method, and concludes that different proportions of mixtures can affect the breakdown threshold and frequency shift.
PHYSICS OF PLASMAS
(2021)
Article
Polymer Science
Pornchai Rachtanapun, Dheerawan Boonyawan, Rafael A. Auras, Gopinath Kasi
Summary: The use of SF6 plasma treatment improves the water resistance of Kraft paper. The optimal treatment conditions are 200 mTorr pressure, 50 Watts power, and 5 minutes treatment time. Increasing the treatment time enhances the contact angle, water absorption time, and Cobb test values of the paper, while the thickness and tensile strength remain relatively constant.
Article
Instruments & Instrumentation
R. Sakuma, K. -T. Lin, S. Kim, F. Kimura, Y. Kajihara
Summary: Passive scattering-type scanning near-field optical microscopy (s-SNOM) has been developed for studying long-wavelength infrared (LWIR) waves. However, the lack of a wavelength selection mechanism in passive LWIR s-SNOM makes it difficult to perform a thorough analysis of the surface-localized waves. In this study, a novel passive scanning near-field optical spectroscopy with a diffraction grating is developed to overcome this limitation. With this new spectroscopy, spectral information of thermally excited evanescent waves can be directly obtained without any influence from the external environment factors.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Astronomy & Astrophysics
T. N. G. Trinh, O. Scholten, S. Buitink, K. D. de Vries, P. Mitra, T. Phong Nguyen, D. T. Si
Summary: In this study, an analytic model MGMR3D is used to reconstruct the structure of the atmospheric electric field by analyzing the radio emission from extensive air showers (EAS). By comparing the results with a microscopic model CoREAS, an improved parametrization method is obtained and successfully applied to a real measurement event during thunderstorm conditions.
Article
Environmental Sciences
Hao Sun, Hu Long, Yi Wu, Yunshun Guo, Mingzhe Rong
Summary: SF6 gas, the strongest greenhouse gas, is widely used in many occasions, but its use is restricted due to environmental concerns. This study proposes the idea of degrading retired SF6 gas using thermal plasma, and a prototype is built and tested. The results show that under suitable reaction conditions, SF6 can be efficiently destroyed using thermal plasma.
ENVIRONMENTAL RESEARCH
(2023)
Article
Physics, Particles & Fields
Xunyu Liang, Ariel Zhitnitsky
Summary: The Telescope Array experiment has recorded several short time bursts of air shower events that are strongly correlated with lightning, possibly representing the direct manifestation of dark matter annihilation events within the axion quark nugget model. This study suggests testing this proposal by searching for radio signals within a specific frequency range, which can be easily discriminated from conventional lightning-induced radio emission.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Applied
Boya Zhang, Junwei Deng, Sunsiqin Wang, Minchuan Cao, Ran Zhou, Guanyu Wang, Xingwen Li, Nian Tang
Summary: HFO-1336mzz(E) is proposed as a new alternative to SF6 with low greenhouse effect and high insulation strength. The thermophysical properties of HFO-1336mzz(E) mixed with CO2 or Air at different temperatures were calculated, including composition, thermodynamic properties, transport properties, and net emission coefficient. The results showed that HFO-1336mzz(E) mixtures exhibit similar energy dissipation and thermal interruption capability as pure SF6, with stronger radiation emission. This study provides important data for magneto-hydro-dynamic calculations and suggests the potential application of HFO-1336mzz(E) mixtures as arc interruption medium.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
Shigeyuki Takagi, Suguru Kawamura, Makoto Sekine
Summary: We developed a coupled calculation method for plasma and gas flows, and used it to simulate dual-frequency excited Ar/SF6 plasma. By comparing the calculation results with experimental results, we determined the secondary electron emission (SEE) coefficient gamma to be 0.04, and compared the dependence of electron density on spatial distribution and SF6 gas partial pressure between the two. The results showed that the calculated electron densities were in good agreement with the experimental results within a certain range of SF6 partial pressure.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Leo Wojszvzyk, Anne Nguyen, Anne-Lise Coutrot, Cheng Zhang, Benjamin Vest, Jean-Jacques Greffet
Summary: In order to achieve fast thermal response, reducing thermal inertia using nanoscale structures is possible, but it may result in low absorption and emission cross-sections.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
V. R. Adineh, O. Coufal, M. Bartlova
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2015)
Article
Physics, Applied
J. Jenista, H. Takana, S. Uehara, H. Nishiyama, M. Bartlova, V. Aubrecht, A. B. Murphy
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2018)
Article
Microscopy
Alexandr Knapek, Josef Sikula, Milada Bartlova
Article
Optics
Jiri Jenista, Hidemasa Takana, Hideya Nishiyama, Milada Bartlova, Vladimir Aubrecht, Anthony B. Murphy
EUROPEAN PHYSICAL JOURNAL D
(2020)
Article
Physics, Applied
Jiri Jenista, Shiu-Wu Chau, Sheng-Wei Chien, Oldrich Zivny, Hidemasa Takana, Hideya Nishiyama, Milada Bartlova, Vladimir Aubrecht, Anthony B. Murphy
Summary: This study introduces a numerical model of a new hybrid-stabilized argon-steam thermal DC plasma torch for efficient abatement of persistent perfluorinated compounds. The results show that the design parameters of the torch significantly affect the characteristics of the plasma jet.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Petr Kloc, Vladimir Aubrecht, Milada Bartlova, Roman Fuchs
Summary: Mean Absorption Coefficients (MACs) offer a suitable method for calculating radiation transfer in complex geometries, reducing computation power and time requirements. This study evaluates the accuracy of three different MAC methods in various pressure conditions, suggesting the hybrid MAC method as the most universal option for radiation evaluation.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2023)
Article
Physics, Nuclear
A. Murmantsev, A. Veklich, V Boretskij, M. Bartlova, L. Dostal, J. Piska, D. Simek, A. Tolochyn
Summary: The study investigates the impact of sintering temperature on erosion resistance of Cu-Cr composite electrodes by analyzing plasma parameters through OES investigation of electric arc discharges. Metal vapours content in the discharge gaps was indirectly determined by estimating it in assumption of LTE, based on experimentally obtained radial distributions of plasma temperature and electron density.
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Nuclear
A. Murmantsev, A. Veklich, V Boretskij, M. Bartlova, L. Dostal, J. Piska, D. Simek, A. Gajdos, A. Tolochyn
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
(2020)
Article
Physics, Applied
P. Kloc, V. Aubrecht, M. Bartlova
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2017)
Proceedings Paper
Engineering, Industrial
Bohuslav Busov, Jan Zidek, Milada Bartlova
STRUCTURED INNOVATION WITH TRIZ IN SCIENCE AND INDUSTRY: CREATING VALUE FOR CUSTOMERS AND SOCIETY
(2016)
Proceedings Paper
Engineering, Electrical & Electronic
J. Sikula, L. Grmela, M. Bartlova, T. Kuparowitz, A. Knapek, F. Mika
2015 INTERNATIONAL CONFERENCE ON NOISE AND FLUCTUATIONS (ICNF)
(2015)