2022 IEEE International Conference on Plasma Science (ICOPS)最新文献_第10页

Investigating the Formation of X-Pinches Using L-Shell Time Resolved Spectroscopy 利用l -壳层时间分辨光谱研究x -夹束的形成

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813186

A. Elshafiey, S. Pikuz, T. Shelkovenko, D. Hammer

{"title":"Investigating the Formation of X-Pinches Using L-Shell Time Resolved Spectroscopy","authors":"A. Elshafiey, S. Pikuz, T. Shelkovenko, D. Hammer","doi":"10.1109/ICOPS45751.2022.9813186","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813186","url":null,"abstract":"The results of L-shell spectroscopic analyses of Hybrid X-pinches (HXPs) employing an X-ray streak camera with a 10ps time resolution are presented. The goal of these experiments is to determine the plasma properties throughout the formation process of the X-pinch bright X-ray spots (hotspots). The most studied radiation from hotspots is K-shell radiation, although as previously demonstrated using streak cameras, K-shell radiation begins with a strong continuum followed by emission lines, which occur during the moment of maximum compression and the expansion phase respectively. [1] L-shell radiation can occur earlier in time as the temperature and density requirements are substantially lower, hence they can be used to shine a light on the early compression phase before maximum compression is reached. The experiments were conducted using the XP pulsed power machine with a current of 250-350kA and a rise time of 50ns. A variety of diagnostics in addition to a streaked X-ray spectrograph, including silicon diodes and PCDs, which were used to examine the L and K-shell emissions in time using an 8Ghz oscilloscope.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"26 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":"121536197","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

Development of Laser Induced Breakdown Spectroscopy Systems for Nuclear Power Plants 核电站激光诱导击穿光谱系统的研制

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813240

J. Wu, Y. Qiu, Z. Zhang, Y. Hang, Y. Zhou, X. Li

{"title":"Development of Laser Induced Breakdown Spectroscopy Systems for Nuclear Power Plants","authors":"J. Wu, Y. Qiu, Z. Zhang, Y. Hang, Y. Zhou, X. Li","doi":"10.1109/ICOPS45751.2022.9813240","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813240","url":null,"abstract":"We report the development of laser induced breakdown spectroscopy (LIBS) techniques and systems for the applications in the nuclear power plants [1] . The plasma behaviors and their spectral properties of the fiber-delivery laser-induced plasma are compared with the conventional LIBS. The use of fiber-delivery would decrease the laser's peak irradiance, and results in weak plasma radiation and insufficient detection sensitivity [2] , [3] . Then spectral enhancement methods including dual-pulse excitation and spatial confinement are investigated to increase the sensitivity of trace elements. Calibration-based methods, including internal standardization, partial least square regression and random forest regression, are established to quantify concentration of Cr, Cu in steels and Cl in cements. In addition, the relationship between the spectral characteristics of the reactor pressure vessel samples under different thermal aging time with their vickers hardness is also established. Based on the researches above, several LIBS instruments have been developed for the measurements of different objects, including a FO-LIBS, and a telescope LIBS for the elemental analysis of the instruments such as the reactor pressure vessel and main pipes inside the containment vessel, and a dual-pulse LIBS system for the evaluation of the chlorine corrosion of the reactor containment. Recently, the developed system has been applied in the nuclear power plant for the identification of materials in nuclear environments.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"8 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":"127731493","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

Electromagnetic Shock-Induced Current Due to Charge Impact on a Conductor 电荷冲击导体引起的电磁冲击感应电流

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813056

D. Li, P. Wong, D. Chernin, Y. Lau

{"title":"Electromagnetic Shock-Induced Current Due to Charge Impact on a Conductor","authors":"D. Li, P. Wong, D. Chernin, Y. Lau","doi":"10.1109/ICOPS45751.2022.9813056","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813056","url":null,"abstract":"When a charged particle strikes a conducting surface and is removed upon impact, an electromagnetic shock is generated at the location of impact. This purely electromagnetic effect was shown in our recent extension [1] of the classical Ramo-Shockley theorem (RS) [2] . RS gives the induced surface current assuming nonrelativistic velocities and electrostatic fields. In this paper, we provide a comparison of the electromagnetic shock-induced current with the classical RS for an infinitely long charged rod striking an infinite, perfectly conducting plate in the single and parallel plate geometries. The electromagnetic shock-induced currents are calculated assuming a constant velocity of the charge before impact, and the classical induced current in the parallel-plate geometry assumes that the charge in transit is subject to an RF voltage. We note that the induced current due to the electromagnetic shock is comparatively small for low impact energies (less than 100 eV, such as those found in multipactor discharges [3] ) but becomes significant for relativistic impact velocities. The electromagnetic shock thus could have a considerable effect on beam loading in relativistic magnetrons and in magnetically insulated line oscillators (MILOs) [4] , but is relatively unimportant in multipactor discharges [3]","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"15 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":"127364492","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

The Physical Effects of Plasma Medicine on Cells: Radio Frequency Stimulated Intercellular and Intracellular Mechanical Waves 血浆药物对细胞的物理作用:射频刺激的细胞间和细胞内机械波

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813242

L. Lin, V. Soni, X. Yao, D. Yan, M. Keidar

{"title":"The Physical Effects of Plasma Medicine on Cells: Radio Frequency Stimulated Intercellular and Intracellular Mechanical Waves","authors":"L. Lin, V. Soni, X. Yao, D. Yan, M. Keidar","doi":"10.1109/ICOPS45751.2022.9813242","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813242","url":null,"abstract":"In the last decade of research works upon plasma medicine using cold atmospheric plasmas (CAP), reactive oxygen and nitrogen species (RONS) are believed to be the major role of these applications. This thus raises the indirect treatments that use the plasma-treated solutions or drugs rather than treat the targeting cells or tissues directly with CAP. However, the difference between direct and indirect treatments cannot be ignored. The indirect treatment does not include the electromagnetic (EM) radiation from CAP. The latter is thus named as the physical effects of plasma medicine. Due to the surface charge on the cell membrane, the membrane oscillation under the external electric field has been reported. In this work, we developed a Michelson laser interferometer system coupled with a high-speed ICCD camera and a radio frequency (RF) emission system to capture the cell membrane and the propagation of the resulting mechanical waves. The system can observe such an oscillation in 3D and real-time. In the further analysis, we will discuss the propagation of such an oscillation, mainly a transverse wave along the cell membrane from the center to its pseudopodia, and the wave in the extracellular medium. The corresponding cancer cell viability and sensitization to cancer medicines are also analyzed. The physical effects of species transportations on the cell membrane are thus suggested.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"35 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":"129051576","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

Diagnostic Developments for Plasma-Material Interactions on a Sheared-Flow-Stabilized Z Pinch 剪切流稳定Z箍缩中等离子体-物质相互作用的诊断进展

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813251

A. Khairi, B. Diamond, A. Johansen, T. Lloyd, E. Meier, U. Shumlak

{"title":"Diagnostic Developments for Plasma-Material Interactions on a Sheared-Flow-Stabilized Z Pinch","authors":"A. Khairi, B. Diamond, A. Johansen, T. Lloyd, E. Meier, U. Shumlak","doi":"10.1109/ICOPS45751.2022.9813251","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813251","url":null,"abstract":"Applying sheared velocity flow to the Z pinch successfully mitigates MHD instabilities, enabling the concept to scale to high energy densities on the ZaP-HD device. This provides a unique platform for studying the plasma-material interactions (PMI) of a Z pinch at fusion-relevant conditions. High particle and energy flux to the electrodes leads to erosion of the plasma-facing surface, especially at the location of current attachment at the nose cone. Initial PMI experiments will study the behavior of a graphite nose cone using new diagnostics currently under development. During the discharge, impurity flux measurements will be made with spectroscopy by converting line-of-sight emission intensities using the number of ionization events per photon, known as the S/XB value. An infrared imaging system will be implemented to attain surface temperature measurements and heat flux. In addition, the study will include conventional ex-situ diagnostics such as scanning electron microscopy, profilometry, and mass-loss techniques that measure net changes resolved over an experimental campaign. A redesigned nose cone will enable quick and frequent removal of a portion of material for this analysis. The implementation of these techniques is described here.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"211 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":"132706280","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

Assessment of Techniques for Determining Space-Charge Limited Current in Nonplanar Crossed-Field Diodes 非平面交叉场二极管空间电荷限制电流测定技术的评价

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813008

H. Wang, N. Harsha, A. Darr, A. Garner

引用次数: 0

Understanding Effects of Operating Parameters on Plasma Catalytic Nitrogen-Methane Coupling Using Optical Emission Spectroscopy 利用发射光谱研究操作参数对等离子体催化氮-甲烷耦合的影响

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813030

I. Akintola, G. Rivera-Castro, J. Yang, J. Hicks, D. Go

{"title":"Understanding Effects of Operating Parameters on Plasma Catalytic Nitrogen-Methane Coupling Using Optical Emission Spectroscopy","authors":"I. Akintola, G. Rivera-Castro, J. Yang, J. Hicks, D. Go","doi":"10.1109/ICOPS45751.2022.9813030","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813030","url":null,"abstract":"Non-thermal plasmas (NTPs) produce highly reactive chemical environments made up of electrons, ions, radicals, and vibrationally excited molecules. These reactive species, when combined with catalysts, can help drive thermodynamically unfavorable chemical reactions at low temperatures and atmospheric pressure. We are particularly interested in the direct coupling of light hydrocarbons (e.g. methane) and nitrogen to produce value-added liquid chemicals (e.g. pyrrole and pyridine) in a plasma-assisted catalytic process. In order to effectively create these plasma catalytic systems, it is imperative that there is a fundamental understanding of the plasma-phase chemistry alone. While there have been many studies on nitrogen (N 2 ) and methane (CH 4 ) plasmas, there is limited understanding on how changing operating parameters (i.e. feed ratio of N 2 /CH 4 , plasma power, operating temperature) affect the plasma properties. In this work, we characterize the plasma using optical emission spectroscopy (OES) and analyze the products formed to understand the effects, if any, of varying plasma parameters on product formation. This is done by determining relevant thermodynamic information such as electron density, vibrational and rotational temperatures, as well as comparing the presence of key plasma species (C-N, C-H) to relevant products formed during nitrogen-methane coupling in plasma-alone and plasma catalytic reactions. Preliminary results show electron density increases with increasing methane content, corresponding to higher methane conversion due to increased electron activity in the plasma.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"750 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":"133693819","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

Low Power Demonstration of a QUASIOPTICAL Active Pulse Compressor for High Power Millimeter-Waves 高功率毫米波准光有源脉冲压缩器的低功率演示

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813042

S. Schaub, B. Hoff

引用次数: 0

3-Dimensional Semi-Analytic Model of a Microwave Driven Miniature Plasma JET 微波驱动微型等离子体射流的三维半解析模型

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813050

M. Klute, E. Kemaneci, H. Porteanu, I. Stefanović, W. Heinrich, P. Awakowicz, R. Brinkmann

引用次数: 0

Biofilm Remediation Using Cold Atmospheric Pressure Plasma Planar and Radial Arrays 低温常压等离子体平面和径向阵列修复生物膜

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813128

M. Pearlman, M. Okebiorun, C. Waite, D. Miller, T. Koch, J. Escoba, J. Tenorio, D. Plumlee, K. Cornell, J. Browning

{"title":"Biofilm Remediation Using Cold Atmospheric Pressure Plasma Planar and Radial Arrays","authors":"M. Pearlman, M. Okebiorun, C. Waite, D. Miller, T. Koch, J. Escoba, J. Tenorio, D. Plumlee, K. Cornell, J. Browning","doi":"10.1109/ICOPS45751.2022.9813128","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813128","url":null,"abstract":"Cold Atmospheric-Pressure Plasma (CAP) planar and radial arrays have been developed to both inactivate and remove biofilms from surfaces [1] , [2] . The planar arrays are made from Low Temperature Co-fired Ceramic (LTCC), consisting of 8 linear discharge elements 2.4 cm long with a 0.75 mm gap between each element, and operate at 1-3 kV, 20 kHz AC. Typical gas flows use Ar at 13 SLM hydrated with water. Previous results show generation of hydrogen peroxide and hydroxyl radicals which increase linearly with plasma exposure times from the arrays and >99% Colony Forming Unit (CFU) reduction in <60 s for bacterial biofilms on a range of substrates (stainless steel, glass, plastic) [1] . Here we apply these arrays on a much larger surface area (10× 10 cm) by scanning the active array across a surface. The CFU count, chemical assays, and etch rates for this experiment will be presented. The radial arrays consist of four LTCC elements ≈3 cm in diameter with ≈0.75 cm gaps between each element. These radial arrays are designed for use in pipes. Imaging of biofilm removal is also under development.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"47 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":"131976267","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