2022 IEEE International Conference on Plasma Science (ICOPS)最新文献

Pulse Broadening Effect Based on the Focal Region Size in Plasma-Based Terahertz Sources 基于等离子体基太赫兹源焦区尺寸的脉冲展宽效应

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9812988

T. Shen, H. Wang, J. Zhang, J. Liu

引用次数: 0

An Experimental Investigation of Charging Methods on the Lunar Surface 月球表面充电方法的实验研究

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9812984

G. D. Griffin, C. M. Carmichael, P. Adamson, L. Matthews, T. Hyde

引用次数: 0

Towards an Integrated Plasma Perception System for Stabilized Z-Pinch Experiments 用于稳定z夹尖实验的集成等离子体感知系统

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813230

A. D. Stepanov

引用次数: 0

Is Biomolecule Oxidation by Plasma-Derived Reactive Species Restricted to the Gas-Liquid Interphase? 等离子体源性活性物质的生物分子氧化仅限于气液界面吗?

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813129

K. Wende, Z. Nasri, J. Striesow, M. Ravandeh, K. Weltmann, Sander Bekeschus, T. Woedtke

{"title":"Is Biomolecule Oxidation by Plasma-Derived Reactive Species Restricted to the Gas-Liquid Interphase?","authors":"K. Wende, Z. Nasri, J. Striesow, M. Ravandeh, K. Weltmann, Sander Bekeschus, T. Woedtke","doi":"10.1109/ICOPS45751.2022.9813129","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813129","url":null,"abstract":"Biomolecules such as amino acids, lipids, and proteins are relevant targets for reactive species due to the presence of sensitive chemical structures, such as electron-rich heteroatoms, (conjugated) double bonds, or aromatic rings. In plasma medicine, the successful application of plasmas for curative or preventive measures has been established. Besides electrical fields, predominantly reactive oxygen and nitrogen species were attributed to be most relevant for the observed effects. While it is accepted that long-lived species such as hydrogen peroxide can penetrate into (model) tissues, the fate of atomic and singlet oxygen or peroxynitrite remains to be clarified. Starting from amino acids (tyrosine, cysteine) and phospholipids (POPC), we found distinctive oxidation products and could show the incorporation of gas-and liquid phase derived atoms indicative for gas-liquid interphase reactions. Via model peptides, isolated proteins, and complex protein samples a site and sub-structure specificity of plasma-derived reactive species could be shown. In catalase, phospholipase, or filamentary proteins, the newly introduced chemical modifications modulated protein activity and recognition and subsequently changed cell physiology. Accordingly, it can be stated that the oxidative modification of biomolecules is a regular event in plasma medicine that modulates or even controls downstream physiologic processes.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116975017","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 High-Yield Magnetized Implosions on the National Ignition Facility 在国家点火装置上模拟高当量磁化内爆

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/icops45751.2022.9813298

S. O'Neill, J. Chittenden, A. Crilly, J. Moody, D. Strozzi, C. Walsh

引用次数: 0

High Resolution Imaging of Laser Plasmas Revealing the Effects of Laser Spot Size on Plasma Emission 激光等离子体的高分辨率成像揭示激光光斑尺寸对等离子体发射的影响

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813338

K. M. Mongey, R. Brady, E. Sokell, B. Delaney, F. O’Reilly

引用次数: 0

Electron beam Propagation Analysis of a Simple, Planar Crossed-Field Structure 简单平面交叉场结构的电子束传输分析

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813328

R. Bhattacharya, J. McClarin, B. Sainz, A. Yue, I. Wolstenholme, M. Cannon, G. Herrera, L. Gaffney, A. Darr, N. Karaulac, G. Rughoobur, W. Chern, A. Garner, A. Akinwande, J. Browning

{"title":"Electron beam Propagation Analysis of a Simple, Planar Crossed-Field Structure","authors":"R. Bhattacharya, J. McClarin, B. Sainz, A. Yue, I. Wolstenholme, M. Cannon, G. Herrera, L. Gaffney, A. Darr, N. Karaulac, G. Rughoobur, W. Chern, A. Garner, A. Akinwande, J. Browning","doi":"10.1109/ICOPS45751.2022.9813328","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813328","url":null,"abstract":"Electron beam stability in the crossed-field gap in terms of magnetic (B) field, magnetic field tilt 1 , and applied voltage 2 have not been studied thoroughly except for a few 1-D theoretical works 1,2 . In this research, we will analyze electron beam propagation and perturbation experimentally, and then the results will be compared with prior theoretical, and simulation works. The planar geometry contains an anode (150 mm long, and 100 wide), sole electrode, gated field emission cathode, and collector. The anode-sole gap was fixed at 20 mm . A B-field of up to 250 Gauss was applied perpendicularly by two Helmholtz coils. A -3 kV DC voltage was applied to the sole, and the anode was biased at 0 V. An in-house developed driver circuit for current emission and data acquisition, was used. The injected beam source is comprised of five gated field emitter arrays (GFEAs) 3 . These GFEAs were arranged to provide uniform electron emission. Each GFEA is capable of producing a field emission current of ≈ 4 mA for a total beam current of ≈ 20 mA, for a gate pulse of 50V. The experimental results show a nominal match with the theory and simulation 4 in terms of magnetic field of 0 T to 0.02 T and magnetic field tilt of 1° to 5°. Experiments are ongoing to further elucidate this behavior.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124975203","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: 1

Multipactor Suppression using Multitone Signals 利用多音信号进行多因子抑制

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813072

M. Mirmozafari, N. Behdad, J. Booske

{"title":"Multipactor Suppression using Multitone Signals","authors":"M. Mirmozafari, N. Behdad, J. Booske","doi":"10.1109/ICOPS45751.2022.9813072","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813072","url":null,"abstract":"We present various multitone radio frequency (RF) excitations to partially or fully suppress the multipactor susceptible zone of a microstripline structure. We study two-tone and more than two-tone RF excitations. The constituting components of the multitone signal differ in amplitude, frequency, and phase, creating a large set of multitone excitations. Our initial investigations show partial shrinkage of the multipactor zone with two-tone RF excitation and we hypothesize that there are certain arrangements of relative amplitude, phase, and frequencies either with two-tone or more than two-tone RF signals that result in full suppression of multipactor. We investigate the multipactor susceptibility charts subject to a certain RF excitation using our developed agile semi-analytic approach [1] . This model was originally developed for a single-tone sinusoidal RF signal and we extended it to include multitone signals as well. We will validate our predictions using our broadband, high-power multipactor experimental apparatus [2] . This setup features several local multipactor sensors and a global sensor to repeatedly and reliably detect multipactor in different stages with different multipactor test conditions. The outcome of this research can help identify multitone multipactor suppression techniques that do not need geometrical modifications while supporting high-rate data transfer in satellite communications.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125958477","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: 1

From 25 Years of Fusion at Z Onward to the Next Generation of Pulsed Power 从Z核聚变25年到下一代脉冲功率

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/icops45751.2022.9813051

D. Sinars

引用次数: 0

Precise Surface Modification of Insulating Materials by Nanosecond Pulse Excited Micro-Plasma Jets 纳秒脉冲激发微等离子体射流对绝缘材料表面的精确修饰

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813274

X. Guan, X. Zhu, M. Li, Z. Fang

{"title":"Precise Surface Modification of Insulating Materials by Nanosecond Pulse Excited Micro-Plasma Jets","authors":"X. Guan, X. Zhu, M. Li, Z. Fang","doi":"10.1109/ICOPS45751.2022.9813274","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813274","url":null,"abstract":"With the widespread use of high-voltage and high-power power electronic devices with wide-bandgap materials, the insulating properties of their packaging have gradually become a research hotspot. Currently, the packaging insulation is mainly improved by means of geometric structure design, dielectric constant regulating and material modification. However, the solid-solid micro-interface existed in packaging structure causes electric field concentration and partial discharge, eventually leading to the breakdown of insulation. A precise and reliable processing is required for the micro-interface without damaging other devices to improve the reliability of the insulation. In this paper, an atmospheric pressure micro-plasma jet driven by nanosecond pulsed power was established, and siloxane precursor was introduced to form the enhanced film at the interface between the insulating layer and the metal. The results show that the width of plasma plume is controlled to hundreds of microns and the length is about tens of millimeters, which fully meets the need for the precise modification. Furthermore, the micro-treated-area on resin surface shows good hydrophobicity and electrical insulating properties, which contributes to the application of micro-plasma jets in precise surface modification.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125407652","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