Plasma Research Express最新文献

Study of cylindrical and spherical dust acoustic solitons and quasiperiodic structures in a quantum dusty plasma 量子尘埃等离子体中圆柱形和球形尘埃声孤子及准周期结构的研究

Plasma Research Express Pub Date : 2022-06-09 DOI: 10.1088/2516-1067/ac777d

E. Emadi, H. Zahed

引用次数: 0

Activation of water in the downstream of low-pressure ammonia plasma discharge 低压氨等离子体放电下游水的活化

Plasma Research Express Pub Date : 2022-06-09 DOI: 10.1088/2516-1067/ac777e

Vikas Rathore, Vyom Desai, N. Jamnapara, S. Nema

{"title":"Activation of water in the downstream of low-pressure ammonia plasma discharge","authors":"Vikas Rathore, Vyom Desai, N. Jamnapara, S. Nema","doi":"10.1088/2516-1067/ac777e","DOIUrl":"https://doi.org/10.1088/2516-1067/ac777e","url":null,"abstract":"In the present work, we study the physicochemical changes that arise in water named plasma processed water (PPW) when it is exposed to the downstream low-pressure discharge of ammonia (NH3) gas. Optical emission spectroscopy and voltage-current characteristics of NH3 plasma are studied to identify species formed in NH3 plasma along with plasma characterization. A three-way full factorial design of experiment is performed to study the effect of process parameters named applied voltage, post-discharge gas-water interaction time, and NH3 gas pressure on physicochemical properties of PPW. The obtained results are analyzed using analysis of variance, standardized effect estimation, regression analysis, and response surfaces. The optimum values of these properties and PPW process parameters are estimated using MATLAB fmincon solver with experimental constraints. The emission spectrum of NH3 plasma showed strong intensity N2 + lines along with weak intensity N2, NH, and N+ lines. The obtained results showed the post-discharge gas-water interaction time and applied voltage had a significant impact on physicochemical properties and ammonium ions concentration in PPW. The obtained optimum value of voltage and time is 550 V and 15 min with given experimental constraints.","PeriodicalId":36295,"journal":{"name":"Plasma Research Express","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45298283","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: 7

Hydroxyl radical dynamics in a gliding arc discharge using high-speed PLIF imaging 高速PLIF成像在滑动电弧放电中的羟基自由基动力学

Plasma Research Express Pub Date : 2022-06-07 DOI: 10.1088/2516-1067/ac76a4

Z. Wang, P. Stamatoglou, C. Kong, J. Gao, Y. Bao, M. Aldén, A. Ehn, M. Richter

引用次数: 0

6D phase space collective modes in Vlasov-Maxwell system Vlasov-Maxwell系统的6D相空间集体模

Plasma Research Express Pub Date : 2022-05-27 DOI: 10.1088/2516-1067/ac743e

H. Lin, C. P. Liu

{"title":"6D phase space collective modes in Vlasov-Maxwell system","authors":"H. Lin, C. P. Liu","doi":"10.1088/2516-1067/ac743e","DOIUrl":"https://doi.org/10.1088/2516-1067/ac743e","url":null,"abstract":"Plasma electromagnetic (EM) kinetic simulation faces two unavoidable difficulties. One arises from the fact that Maxwell equations determine a simultaneity relation between transverse electric field E⃗Tr and local growth rates of probability distribution function (PDF) f in Vlasov-Maxwell (V-M) simulation in Eulerian approach, so does that between ETr and Lagrangian particles’ time-varying rates which refers to displacement of f -element in 6D phase space in V-M simulation in Lagrangian approach, and macroparticles’ accelerating rates in Particle-in-Cell (PIC) simulation. These simultaneous with ETr are termed as bottom objects’ growth rates (BOGRs) in this work. Directly solving the BOGRs needs to diagonalize a large full matrix, and hence often be approximated. The other arises from the fact that Lagrangian particles’ time-histories should uniformly converge with respect to the time-step. This severe requirement is difficult to be satisfied and hence some of Lagrangian particles’ time-histories lose fidelity. We propose a strict alternative method free from two difficulties. The initial-value problem of V-M system can be interpreted by 6D phase space allowed deformation of an initial f -profile. By virtue of a more compact description of f, in which a conditional probability density function (C-PDF) well reflects some macroscopic conservation laws behind the V-M system, we can interpret the initial-value problem of f in terms of 6D standing-wave oscillation in the C-PDF. A key subtle difference between microscopic scalar field and microscopic vector field can also lead to a similar scheme of particle simulation. PACS: 52.65.-y.","PeriodicalId":36295,"journal":{"name":"Plasma Research Express","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48785331","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

Two stream instabilities in unmagnetized nonrelativistic quantum plasma 非磁化非相对论量子等离子体中的双流不稳定性

Plasma Research Express Pub Date : 2022-05-26 DOI: 10.1088/2516-1067/ac73e5

Shivani Singh, Jyoti, K. Misra

引用次数: 0

Experimental realization of nonlinear demagnification in plasma-based charged particle optics 基于等离子体的带电粒子光学非线性去放大的实验实现

Plasma Research Express Pub Date : 2022-05-18 DOI: 10.1088/2516-1067/ac7128

S. Barman, Sanjeev Kumar Maurya, S. Bhattacharjee

引用次数: 0

A resonator-based dual-frequency driven atmospheric pressure plasma jet 基于谐振腔的双频驱动大气压等离子体射流

Plasma Research Express Pub Date : 2022-05-13 DOI: 10.1088/2516-1067/ac6fc0

R. Bansemer, K. Weltmann

引用次数: 1

Plasma sanitization of cherry belle radish seeds for Space agricultural applications 用于太空农业应用的樱桃白萝卜种子的等离子体消毒

Plasma Research Express Pub Date : 2022-04-06 DOI: 10.1088/2516-1067/ac64ee

R. Gott, K. Engeling, C. Johnson, H. Boles, Victoria Brown, M. Hummerick, G. Massa, Annie Meier

{"title":"Plasma sanitization of cherry belle radish seeds for Space agricultural applications","authors":"R. Gott, K. Engeling, C. Johnson, H. Boles, Victoria Brown, M. Hummerick, G. Massa, Annie Meier","doi":"10.1088/2516-1067/ac64ee","DOIUrl":"https://doi.org/10.1088/2516-1067/ac64ee","url":null,"abstract":"As human innovation continuously expands the knowledge base for life beyond Earth, the need for self-sufficient spacecraft is essential. With that, space crop production facilities are ever expanding for research and development. A current area of key interest is seed sanitation before transport from ground to the International Space Station (ISS). Sanitation practices are performed to mitigate any potential biohazard and to ensure the viability of the seed. Conventional methods involve fumigation of seeds or chemical processes but are not effective with all seed types. Therefore, plasma technology was implemented in this research to explore low-temperature plasmas as an alternative means for seed sanitation without the need for chemicals. This project investigated the viability of plasma as a means for sanitation by incorporating three different plasma types within the study. For the treatment of Cherry Belle radish seeds, the optimal system was a radio frequency (RF) sub-atmospheric plasma chamber. Treatments of 100 W for 10 min or longer with the Diener system consistently reduced microbial loads by 90% or more. While 20-min treatments caused reductions in germination rate, a treatment of 15 min with the Diener system at 100 W consistently resulted in germination rates above 80% after 1 month of seed storage. For the 5 and 10 min treatments at a pressure of 187 mTorr and power of 100 W, growth was also accelerated. Additionally, plasma provided 90% reduction of Escherichia coli and Bacillus pumilis and a 99% reduction of Fusarium ozysporum on inoculated seeds. Overall, the plasma systems show promising potential but require further exploration.","PeriodicalId":36295,"journal":{"name":"Plasma Research Express","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41946576","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: 3

Influence of magnetic filter position on negative ion density in oxygen RF discharge 磁滤位置对氧射频放电中负离子密度的影响

Plasma Research Express Pub Date : 2022-03-09 DOI: 10.1088/2516-1067/ac5be4

N. Sharma, M. Chakraborty, A. Mukherjee, P. Saha

引用次数: 0

The prediction model of regression for the CO removal from exhaust using plasma- catalyst process 等离子体-催化剂法脱除废气CO的回归预测模型

Plasma Research Express Pub Date : 2022-03-04 DOI: 10.1088/2516-1067/ac5ac2

R. Yarahmadi, S. Soleimani-Alyar

{"title":"The prediction model of regression for the CO removal from exhaust using plasma- catalyst process","authors":"R. Yarahmadi, S. Soleimani-Alyar","doi":"10.1088/2516-1067/ac5ac2","DOIUrl":"https://doi.org/10.1088/2516-1067/ac5ac2","url":null,"abstract":"Background. The present study considers the main physicochemical parameters included in the optimum removal efficiency of carbon monoxide (CO) using the plasma-driven catalysis reactor. Material and Methods. A nonthermal plasma (NTP) –catalyst process was applied to investigate the removal efficiency of CO. The interaction of proposed factors such as; temperature, space-time, propane concentration, applied voltage, and the current was studied to estimate the optimum conditions of CO removal efficiency. Data analysis of experiments was done using General Linear Model (GLM) analysis in SPSS (version 22.0.) and fit linear regression model in MATLAB R2013a software. Results and Discussion. The results showed the interaction of temperature and space-time play a key role in CO removal (P-value <0.05). This interaction was found significantly positive with a decrease in space-time. The effect of applied voltage and current (i.e., two main parameters of power consumption) was found significant in the interaction model of C3H8/CO ratio with temperature, as well as space-time. Also, the presented regression model of results confirms the meaningful effect of interactions. Reduction of space-time is known as an energy consumption parameter controlled by reactor gap discharge, gas composition, and inner electrode material. The effect of propane presence as a reducer agent in the gas composition was found significant in the interaction model of space-time and temperature. Conclusion. Considering physicochemical parameters in designing NTP- catalyst reactors can influence energy efficiency significantly.","PeriodicalId":36295,"journal":{"name":"Plasma Research Express","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61181897","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