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2020 IEEE International Conference on Plasma Science (ICOPS)最新文献

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Analysis of Coupled Space Harmonics in Millimeter-Wave Overmoded Corrugated Structures with Finite and Infinite Length 有限和无限长毫米波超模波纹结构的耦合空间谐波分析
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717355
Liangjie Bi, L. Meng, Yong Yin, A. Andreev, A. Elfrgani, E. Schamiloglu
{"title":"Analysis of Coupled Space Harmonics in Millimeter-Wave Overmoded Corrugated Structures with Finite and Infinite Length","authors":"Liangjie Bi, L. Meng, Yong Yin, A. Andreev, A. Elfrgani, E. Schamiloglu","doi":"10.1109/ICOPS37625.2020.9717355","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717355","url":null,"abstract":"The coupled space harmonics in a millimeter-wave overmoded corrugated structure with finite- and infinite-length are analyzed. For a comprehensive physics analysis, the electromagnetic modes constructing the coupled space harmonics are studied using simulated two- and three-dimensional field patterns in corrugated and smooth-walled structures with finite length based on electric and magnetic boundary conditions. Simulation results show that specific stopbands will emerge at all of the intersections between the dispersion curves of different TM0n, modes when considering infinite-length structures with corrugations. The number of split coupled harmonics with finite length will be increased. The dispersion relations of finite length structures are thus regrouped according to the stopbands and become the same shape as that of the infinite structure which is derived analytically. This provides a significant basis to clarify the electromagnetic characteristics for transferring the dispersion relations of finite length structures into infinite structures.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126035633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Imaging of Feedstock Particle Dynamics in Thermal Plasma for Nanoparticle Sythesis by Laser-Strobe Measurement 热等离子体中用于纳米粒子合成的原料粒子动力学成像激光频闪测量
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717455
R. Furukawa, K. Akashi, Y. Nagase, Yasunori Tanaka, Y. Nakano, T. Ishijima, S. Sueyasu, Shu Watanabe, K. Nakamura
{"title":"Imaging of Feedstock Particle Dynamics in Thermal Plasma for Nanoparticle Sythesis by Laser-Strobe Measurement","authors":"R. Furukawa, K. Akashi, Y. Nagase, Yasunori Tanaka, Y. Nakano, T. Ishijima, S. Sueyasu, Shu Watanabe, K. Nakamura","doi":"10.1109/ICOPS37625.2020.9717455","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717455","url":null,"abstract":"Nanoparticles are particles with a size of 100 nm or less, which have different properties from bulk materials. For various applications of such nanoparticles, it is desired to develop a high-rate synthesis method for nanoparticles. The authors have developed pulse modulated induction thermal plasma (PMITP) and time-controlled feedstock feeding (TCFF) method, as a method for synthesizing large amounts of nanoparticles [1]. In PMITP, the temperature of thermal plasma can be controlled in the order of milliseconds by amplitude-modulating the high-frequency coil current in a rectangular waveform. To this PMITP, feedstock particles are intermittently injected to be evaporated in high-temperature period, and then the evaporated feedstock vapor is transported to downstream of the plasma torch, where nucleation occurs due to supersaturation state, generating nanoparticles.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126087833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Pulsed Electric Field Treatment on Lipase Activity 脉冲电场处理对脂肪酶活性的影响
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717527
Pengfei Li, Jiang Han, Zhen Tang, S. Qin
{"title":"Effects of Pulsed Electric Field Treatment on Lipase Activity","authors":"Pengfei Li, Jiang Han, Zhen Tang, S. Qin","doi":"10.1109/ICOPS37625.2020.9717527","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717527","url":null,"abstract":"Pulsed electric field (PEF) treatment, as a non-thermal micro-organisms processing technology, has great potential in liquid food sterilization, microbial cells electro-manipulation and cell content extraction. Majority of the PEF studies indicated that PEF process can cause the inactivation of microbial cells and enzymes. However, recent study has also shown that PEF treatment can be used to enhance the enzyme activity under certain operation parameters. 1","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125496204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Permeability of Epidermal Layer of The Skin for Adenosine by Microplasma and Iontophoresis 微等离子体和离子透入法研究皮肤表皮层对腺苷的通透性
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717582
J. Krištof, A. Yahaya, Fariha Mustafa, Ryo Yokoyama, M. Blajan, Kazuo Shimizu
{"title":"Permeability of Epidermal Layer of The Skin for Adenosine by Microplasma and Iontophoresis","authors":"J. Krištof, A. Yahaya, Fariha Mustafa, Ryo Yokoyama, M. Blajan, Kazuo Shimizu","doi":"10.1109/ICOPS37625.2020.9717582","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717582","url":null,"abstract":"Epidermal layer of the skin, especially its upper layer called stratum corneum, is the main barrier to prevent foreign molecules from entering the body. However, the skin also represents a route for a drug delivery. Transdermal drug delivery has some advantages compared to other drug delivery techniques. Thus the risk of infection typical for injection delivery or metabolic changes of drug typical for oral delivery are eliminated. In the case of transdermal drug delivery, the skin barrier must be disturbed. There are several approaches how to disturb the barrier effect of stratum corneum such as electroporation, iontophoresis, sonophoresis or chemical enhancers. Using a plasma discharge for the improvement of the skin permeability is a relatively new a technique.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126619842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
HNT as a Biodegradable Carrier Polymerized by Cold Atmospheric Pressure Plasma for In Vivo Release of Carboplatin and Paclitaxel 低温常压等离子体聚合的可降解载体HNT在体内释放卡铂和紫杉醇
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717782
Milad Rasouli, Nadia Fallah, M. Ghoranneviss, M. Amini
{"title":"HNT as a Biodegradable Carrier Polymerized by Cold Atmospheric Pressure Plasma for In Vivo Release of Carboplatin and Paclitaxel","authors":"Milad Rasouli, Nadia Fallah, M. Ghoranneviss, M. Amini","doi":"10.1109/ICOPS37625.2020.9717782","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717782","url":null,"abstract":"Lung cancer is the leading cause of cancer mortality worldwide. Recently, Cold atmospheric pressure plasma (CAP), plasma activated liquid (PAL), and nanomaterial have been significant advances in oncotherapy. Reactive oxygen-nitrogen species (RONS) generated by CAP interact with cells and induce selective responses between the malignant and normal cells. Halloysite clay nanotubes (HNTs) have shown potential as a drug delivery vehicle, and its surface can be modified and tailored as a targeted drug delivery system. The study aims to investigate for the first time the anti-tumor effect of CAP, PAL, and HNT is a nanocarrier for chemotherapeutic agents, on the lung cancer model in mice. In the CAP treatment modality, we set mice in contact with CAP at different times. Also, to prepare PAL we expose a Phosphate Buffered Saline (PBS) in the same conditions. To this end, mouse models tumor size evaluate after CAP, PAL, and the combination of CAP and HNT. Besides, High performance liquid chromatography, surface morphology, tissue distribution, luminescence assay, in vivo anti-angiogenesis assay perform to investigate the efficiency of the mentioned treatment modality. Also, the pH and concentration of long-lived reactive oxygen and nitrogen species have been measured. Collectively, we expect CAP as an oncotherapeutics agent is a promising method for the future combination or multimodal lung cancer oncotherapy.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114954081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pulsed-Power Magnetized Jets for the Study of Star Formation 用于研究恒星形成的脉冲功率磁化喷流
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717534
R. Melean, R. Young, S. Klein, T. Smith, G. Dowhan, P. Campbell, N. Jordan, R. Mcbride, C. Kuranz
{"title":"Pulsed-Power Magnetized Jets for the Study of Star Formation","authors":"R. Melean, R. Young, S. Klein, T. Smith, G. Dowhan, P. Campbell, N. Jordan, R. Mcbride, C. Kuranz","doi":"10.1109/ICOPS37625.2020.9717534","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717534","url":null,"abstract":"We present the first results of a laboratory-astrophysics experiment with the goal of translating research performed at a major (several kJ) laser facility1 into the pulsed-power laboratory at the Michigan Accelerator for Inductive Z-Pinch Experiments (MAIZE). We aim to explore the interactions of magnetized plasma flows in astrophysical accretion shock events found in the star formation process of highly magnetic T Tauri stars. In these first preliminary results, we a focus on the structure and development of shock instabilities. To accomplish this, we generated magnetized plasma flows via pulsed-power in the Linear Transformer Drive (LTD) at the University of Michigan, by ablating aluminum wire arrays with currents in the order of 1 Mega-Amp. We use a conical array that drives a plasma jet2 and a 5 Tesla, Helmholtz coil providing a uniform axial magnetic field. Our first images come from self-emission and shadowgraphy captured by a fast-frame camera, showing the structure and evolution of the plasma jet.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115337278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of the Electron Temperature and Power Absorption in Capacitively Coupled Radio Frequency Discharges 电容耦合射频放电中电子温度和功率吸收的动力学
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717603
S. Wilczek, J. Schulze, R. Brinkmann, Z. Donkó, J. Trieschmann, T. Mussenbrock
{"title":"Dynamics of the Electron Temperature and Power Absorption in Capacitively Coupled Radio Frequency Discharges","authors":"S. Wilczek, J. Schulze, R. Brinkmann, Z. Donkó, J. Trieschmann, T. Mussenbrock","doi":"10.1109/ICOPS37625.2020.9717603","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717603","url":null,"abstract":"In low pressure $(mathrm{p} < 10 text{Pa})$ capacitively coupled radio frequency (CCRF) discharges, the optimization of technological processes, such as sputtering, etching and plasma enhanced chemical vapor deposition requires an essential understanding of the electron dynamics. This is because electrons with a specific energy threshold, e.g., ionization energy, are responsible for the generation of positive ions and radicals. Therefore, the two most important questions in low pressure CCRF discharges are, how do the electrons gain and loss their energy during one radio frequency cycle1 and what is a typical electron temperature?","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115539669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling Plasma Probes with Speed-Limited Particle-In-Cell Simulation 用速度限制粒子在细胞内的模拟建模等离子体探针
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717901
G. Werner, T. Jenkins, S. Robertson, J. Cary
{"title":"Modeling Plasma Probes with Speed-Limited Particle-In-Cell Simulation","authors":"G. Werner, T. Jenkins, S. Robertson, J. Cary","doi":"10.1109/ICOPS37625.2020.9717901","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717901","url":null,"abstract":"Langmuir probes are widely used to measure density and temperature in laboratory and space plasmas. However, interpretation of probe data is often difficult because of non-ideal plasma conditions, such as complicated geometry, non-zero electric fields due to proximity to the chamber or spacecraft, magnetic fields, moderate collisionality, secondary emission, etc. Particle-in-cell (PIC) simulations can robustly include all these effects, but often require excessive computation time. The Speed-limited PIC (SLPIC) approach is a modification of PIC that can speed up simulation by roughly the square root of the ion/electron mass ratio. In a steady state, this approach is equivalent to the numerical timestepping method, which evolves electrons and ions using different timesteps; for steady-state electrostatic simulations, this method can be realized simply by performing a simulation with electrons and positrons (reduced-mass ions), and scaling the resulting ion velocities and currents appropriately. However, SLPIC offers a way to simulate slow time-dependence as well as the steady state. We demonstrate these approaches by simulating a Langmuir probe in electron-argon plasma, reducing simulation time by more than a factor of 100.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116443025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Algorithm for Calculating the Operating Voltage of Complex Slow Wave Structures 一种计算复杂慢波结构工作电压的算法
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717629
Duo Xu, W. Shao, Tenglong He, Zhanliang Wang, H. Gong, Zhigang Lu, Z. Duan, Y. Gong, Shaomeng Wang
{"title":"An Algorithm for Calculating the Operating Voltage of Complex Slow Wave Structures","authors":"Duo Xu, W. Shao, Tenglong He, Zhanliang Wang, H. Gong, Zhigang Lu, Z. Duan, Y. Gong, Shaomeng Wang","doi":"10.1109/ICOPS37625.2020.9717629","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717629","url":null,"abstract":"In the purpose of developing traveling wave tubes (TWTs) with better performance, researchers have proposed a variety of novel slow wave structures (SWSs), such as overmoded SWSs, angular log-periodic SWSs1 and some SWSs loaded by photonic crystals2 et al. These novel SWSs are more complex and their dispersion characteristics are difficult to be speculated by existing theories.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetisation Effects in Indirect Drive Inertial Confinement Fusion 间接驱动惯性约束聚变中的磁化效应
2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI: 10.1109/ICOPS37625.2020.9717536
J. Chittenden, C. Walsh, A. Sullivan, B. Appelbe
{"title":"Magnetisation Effects in Indirect Drive Inertial Confinement Fusion","authors":"J. Chittenden, C. Walsh, A. Sullivan, B. Appelbe","doi":"10.1109/ICOPS37625.2020.9717536","DOIUrl":"https://doi.org/10.1109/ICOPS37625.2020.9717536","url":null,"abstract":"Strong magnetic fields, both externally applied and internally generated through the Biermann battery effect can have an importance influence on the fusion performance of indirect drive ICF experiments. Magnetic fields suppress the electron heat flow, introducing strong anisotropy as well as modifying fast particle transport such as alpha particle heating and plasma dynamics on the small scale through the Lorentz force. Extended MHD terms such as the Nernst effect and Righi-LeDuc heat flow also play an important role.","PeriodicalId":122132,"journal":{"name":"2020 IEEE International Conference on Plasma Science (ICOPS)","volume":"892 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122042177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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