期刊文献+
共找到49,523篇文章
< 1 2 250 >
每页显示 20 50 100
Characterization of a New DC-Glow Discharge Plasma Set-Up to Enhance the Electronic Circuits Performance 认领
1
作者 A. A. Talab Ashraf Yahia +1 位作者 M. A. Saudy M. Elsayed 《现代物理(英文)》 2020年第7期1044-1057,共14页
The (DC-GDPAU) is a DC glow discharge plasma experiment that was designed, established, and operated in the Physics Department at Ain Shams University (Egypt). The aim of this experiment is to study and improve some p... The (DC-GDPAU) is a DC glow discharge plasma experiment that was designed, established, and operated in the Physics Department at Ain Shams University (Egypt). The aim of this experiment is to study and improve some properties of a printed circuit board (PCB) by exposing it to the plasma. The device consists of cylindrical discharge chamber with movable parallel circular copper electrodes (cathode and anode) fixed inside it. The distance between them is 12 cm. This plasma experiment works in a low-pressure range (0.15 - 0.70 Torr) for Ar gas with a maximum DC power supply of 200 W. The Paschen curves and electrical plasma parameters (current, volt, power, resistance) characterized to the plasma have been measured and calculated at each cm between the two electrodes. Besides, the electron temperature and ion density are obtained at different radial distances using a double Langmuir probe. The electron temperature (<em>KT<sub>e</sub></em>) was kept stable in range 6.58 to 10.44 eV;whereas the ion density (<em>ni</em>) was in range from 0.91 × 10<sup>10</sup> cm<sup><span style="white-space:nowrap;">&minus;</span>3</sup> to 1.79 × 10<sup>10</sup> cm<sup><span style="white-space:nowrap;">&minus;</span>3</sup>. A digital optical microscope (800×) was employed to draw a comparison between the pre-and after effect of exposure to plasma on the shaping of the circuit layout. The experimental results show that the electrical conductivity increased after plasma exposure, also an improvement in the adhesion force in the Cu foil surface. A significant increase in the conductivity can be directly related to the position of the sample surfaces as well as to the time of exposure. This shows the importance of the obtained results in developing the PCBs manufacturing that uses in different microelectronics devices like those onboard of space vehicles. 展开更多
关键词 DC Glow Discharge Paschen Curve Cold Plasma Characteristics Double Electric Probe Printed Circuit Board (PCB) Properties Electronic Plasma Application
在线阅读 免费下载
The Copper Thin Layer Deposition by Pulse Vacuum-Arc Sprayer 认领
2
作者 A. M. Zhukeshov А. T. Gabdullina +3 位作者 B. M. Ibraev M. Mukhamedryskyzy А. U. Amrenova E. Baltabai 《材料科学与应用期刊(英文)》 2020年第3期177-183,共7页
In this work, the deposition process features of a copper coating on stainless steel substrate, using the pulse vacuum arc spraying method were researched. A continuous layer of copper was deposited on a stainless ste... In this work, the deposition process features of a copper coating on stainless steel substrate, using the pulse vacuum arc spraying method were researched. A continuous layer of copper was deposited on a stainless steel substrate, and a high degree of coating adhesion to the substrate was demonstrated. The thickness of coating using application time was calculated, and the surface unevenness was estimated. Inside the coating layer substrate material elements were observed, that could appear as a result of simultaneously plasma spraying on the surface of the substrate. The feature of this method was discovered, that surface plasma plays a significant role in the deposition process. Finally, it was shown that the device with a pulsed arc could effectively be used in industry, since it is possible to change the layer thickness in the range of hundreds of microns by varying the deposition time. 展开更多
关键词 VACUUM-ARC PLASMA PLASMA DEPOSITION COPPER Thin Layers MICROHARDNESS
在线阅读 免费下载
Design and characteristics of a triple-cathode cascade plasma torch for spheroidization of metallic powders 认领
3
作者 邱吉尔 余德平 +3 位作者 李裔红 李磊 杨彤 董宇庆 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第11期91-102,共12页
Arc plasma torch is an effective tool for spheroidization of metallic powders.However,as most conventional plasma torches were not specifically designed for plasma spheroidization,they may exhibit the disadvantages of... Arc plasma torch is an effective tool for spheroidization of metallic powders.However,as most conventional plasma torches were not specifically designed for plasma spheroidization,they may exhibit the disadvantages of the radial injection of powders,large fluctuations in the arc voltage,large gas flow rate,and disequilibrium between multiple plasma jets during the spheroidization process.Therefore,this paper presents a triple-cathode cascade plasma torch(TCCPT)for plasma spheroidization.Its structural design,including three cathodes,a common anode,and three sets of inter-electrodes,are detailed to ensure that powders can be inserted into the plasma jet by axial injection,the arc voltage fluctuations are easily maintained at a low level,and the plasma torches can work at a relatively small gas flow rate.Experimental results showed that the proposed TCCPT exhibits the following characteristics:(1)a relatively small arc voltage fluctuation within 5.3%;(2)a relatively high arc voltage of 75 V and low gas flow rate range of10-30 SLM;(3)easy to be maintained at the equilibrium state with the equilibrium index of the three plasma jets within 3.5 V.Furthermore,plasma spheroidization experiments of SUS304 stainless steel powers were carried out using the proposed TCCPT.Results verified that the proposed TCCPT is applicable and effective for the spheroidization of metallic powders with wide size distribution. 展开更多
关键词 triple-cathode cascade plasma torch plasma jet plasma spheroidization
SMILE卫星的表面充电效应 认领
4
作者 许亮亮 蔡明辉 +1 位作者 杨涛 韩建伟 《物理学报》 SCIE EI CAS CSCD 北大核心 2020年第16期176-183,共8页
卫星在轨运行时,航天器表面材料与周围的等离子体环境相互作用,会积累电荷产生表面充电效应,严重时将导致静电放电从而影响航天器的运行.SMILE卫星运行在太阳同步轨道和高倾角大椭圆轨道,在轨运行将遭遇多种等离子体环境,产生的表面充... 卫星在轨运行时,航天器表面材料与周围的等离子体环境相互作用,会积累电荷产生表面充电效应,严重时将导致静电放电从而影响航天器的运行.SMILE卫星运行在太阳同步轨道和高倾角大椭圆轨道,在轨运行将遭遇多种等离子体环境,产生的表面充电效应将影响卫星在轨安全和科学数据的获取.本文采用spacecraft plasma interaction system软件仿真,建立了复杂精细的三维模型,评估了卫星在磁尾瓣等离子体、太阳风等离子体及地球静止轨道极端恶劣等离子体不同环境中的表面充电风险.仿真结果显示,不同环境下的表面充电电位有差异,但是不会影响科学载荷的数据获取.通过对表面电流的分析发现,二次电子发射在各种等离子体环境中都对表面充电有很大的影响.通过分析阴影区材料表面充电电流,计算得到的结果能够补充氧化铟锡材料二次电子发射系数实验曲线.在光照下,光电子发射在表面充电中占据统治地位. 展开更多
关键词 表面充电效应 SMILE 卫星 SPACECRAFT PLASMA INTERACTION system 仿真 等离子体
在线阅读 下载PDF
COVID-19 Pandemic: Its Origin, Implications and Treatments 认领
5
作者 Peter K. Law 《再生医学期刊(英文)》 2020年第2期43-64,共22页
This is a succinct and current review of pertinent literature to guide developing serum therapy as an emergent treatment to save human lives at times of natural or genetically engineered viral/bacterial pandemics. The... This is a succinct and current review of pertinent literature to guide developing serum therapy as an emergent treatment to save human lives at times of natural or genetically engineered viral/bacterial pandemics. The origin of 2019-nCoV and implications of COVID-19 are discussed using direct quotes of published scientific literature to avoid misinterpretation on this very important event that has caused great loss of human lives and international social economy. It is the goal of this review to warn against and to correct international misunderstanding created by deliberate falsification of scientific documentations and events. This misunderstanding may lead to further destruction of life, economy, and political relations. People should not be blind-sighted when making life decisions. 展开更多
关键词 2019-nCoV COVID-19 Serum Therapy Pandemics EPIDEMICS Convalescent Plasma CORONAVIRUS Vaccine Bacteria Mutation Biologic Warfare Weapons
在线阅读 免费下载
Non-Drug Therapy to Combat Coronavirus 认领
6
作者 Tao Sun 《再生医学期刊(英文)》 2020年第2期65-70,共6页
Novel coronavirus is threatening the health of people all over the world and all possible treatment strategies are in urgent. The sensitive of virus to heat proposed temperature treatment as an effective method agains... Novel coronavirus is threatening the health of people all over the world and all possible treatment strategies are in urgent. The sensitive of virus to heat proposed temperature treatment as an effective method against coronavirus. Here, we proposed several non-drug therapies including far-infrared, thermal air, thermal oxygen, ozone, hydrogen therapy and plasma physical therapy for immediate clinical trial and implementation. Compared with the drug therapy, these methods are safe without side effects, the highest benefit-to-risk ratio, user-friendly, and low implementation costs. It is urgent and significant to start these non-drug therapeutic design and implementation as early as possible, to determine the safety and effectiveness of these therapeutic methods. 展开更多
关键词 Non-Drug Therapy Plasma Physical Therapy CORONAVIRUS
在线阅读 免费下载
Investigation on plasma characteristics in a laser ablation pulsed plasma thruster by optical emission spectroscopy 认领
7
作者 张宇 吴建军 +2 位作者 欧阳 张代贤 李健 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第4期83-89,共7页
In order to further improve the propulsion performance of pulsed plasma thrusters for space micro propulsion,a novel laser ablation pulsed plasma thruster is proposed,which separated the laser ablation and electromagn... In order to further improve the propulsion performance of pulsed plasma thrusters for space micro propulsion,a novel laser ablation pulsed plasma thruster is proposed,which separated the laser ablation and electromagnetic acceleration.Optical emission spectroscopy is utilized to investigate the plasma characteristics in the thruster.The spectral lines at different times,positions and discharge intensities are experimentally recorded,and the plasma characteristics in the discharge channel are concluded through analyzing the variation of spectral lines.With the discharge energy of 24 J,laser energy of 0.6 J and the use of aluminum propellant,the specific impulse and thrust efficiency reach 6808 s and 70.6%,respectively. 展开更多
关键词 laser ablation PULSED PLASMA THRUSTER optical EMISSION SPECTROSCOPY PLASMA PROPULSION performance
Plasma Cell Leukemia: A Case Report and Literature Review 认领
8
作者 B. Malam-Abdou A. Djibrilla Almoustapha +7 位作者 M. Chefou S. Brah M. Maman Brah F. Abba Ousmane M. Daou M. A. Mahamane Sani M. R. Badé E. O. Adehossi 《血液病期刊(英文)》 2020年第3期71-76,共6页
<span style="font-family:Verdana;">Plasma cell leukemia is a rare malignant hemopathy, characterized by a peripheral plasma cell proliferation of more than 20% of the leukocyte formula. A few rare case... <span style="font-family:Verdana;">Plasma cell leukemia is a rare malignant hemopathy, characterized by a peripheral plasma cell proliferation of more than 20% of the leukocyte formula. A few rare cases have been described. From which we report a case of plasma cell leukemia in a 52-year-old Nigerien subject initially in a coma, whose anemia led to the diagnosis in the Onco-Hematology department of the National Hospital of Niamey and the evolution was marked by clinical and biological remission after 3 cures of CTD, but died in an infectious picture after 6 cures. 展开更多
关键词 Plasma Cell Leukemia Onco-Hematology HNN Niamey-Niger
在线阅读 下载PDF
Estimation of plasma density perturbation from dusty plasma injection by laser irradiation on tungsten target in DiPS 认领
9
作者 In Je KANG Min-Keun BAE +2 位作者 In Sun PARK Min Ji LEE Kyu-Sun CHUNG 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第4期90-96,共7页
To investigate the interaction of dusty plasma with magnetized plasmas at divertor plasma simulator,radial profiles of plasma density(ne)and electron temperature were measured in terms of plasma discharge currents and... To investigate the interaction of dusty plasma with magnetized plasmas at divertor plasma simulator,radial profiles of plasma density(ne)and electron temperature were measured in terms of plasma discharge currents and magnetic flux intensity by using a fast scanning probes system with triple tips.Dusty plasma with dusts(a generation rate of 3μg s-1 and a size of 1–10μm)was produced via interactions between a high-power laser beam and a full tungsten target.As ne increases,the scale of the effects of dusty plasma injection on magnetized plasmas was decreased.Also,the duration of transient fluctuation was reduced.For numerical estimation of plasma density perturbation due to dusty plasma injection,the result was 10%at a core region of the magnetized plasma with ne of(2–5)×10^11 cm^-3 at steady state condition. 展开更多
关键词 PLASMA density PERTURBATION DUSTY PLASMA TUNGSTEN DUST DiPS
Effects of Plasma Treatment of Maize Seeds (No.2-Zhunuo) on the Biological Properties and Yield 认领
10
作者 Zhuwen Zhou Yanfen Huang +1 位作者 Guangqiang Xu Kong Bo 《农业科学(英文)》 2020年第4期439-447,共9页
The plasma seed processor was used to treat maize seeds (No.2-Zhunuo), and the effects of plasma treatment of the maize seeds on the biological properties and yield were studied by different doses (250 mA - 2000 mA). ... The plasma seed processor was used to treat maize seeds (No.2-Zhunuo), and the effects of plasma treatment of the maize seeds on the biological properties and yield were studied by different doses (250 mA - 2000 mA). The results showed that the effect of plasma treatment on the biological characters of maize was different, and the plant characters and yield of maize in the eight groups of plasma treatment were significantly higher than that of untreated (CK), especially the treatment current (dose) of 1500 mA, 1250 mA, and 750 mA, respectively, which had significant changes in the effect of maize plant traits. From the yield point of view, the top two are: plasma dose 1500 mA, and 1250 mA. The plasma doses of 750 mA, 1000 mA, and 1500 mA were selected from the fruit number of maize. The disease resistance of treated maize is also better than that of untreated maize (CK). In a word, the yield, plant traits, and disease resistance of maize seeds can be improved to different extent by different doses of plasma. 展开更多
关键词 PLASMA MAIZE SEED PLANT TRAITS YIELD
在线阅读 免费下载
Characterization of a microsecond pulsed non-equilibrium atmospheric pressure Ar plasma using laser scattering and optical emission spectroscopy 认领
11
作者 贾凤东 吴勇 +7 位作者 敏琦 苏茂根 Keigo TAKEDA Kenji ISHIKAWA Hiroki KONDO Makoto SEKINE Masaru HORI 钟志萍 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第6期120-127,共8页
A non-equilibrium atmospheric pressure argon(Ar)plasma excited by microsecond pulse is studied experimentally by laser scattering and optical emission spectroscopy(OES),and theoretically by collisional-radiative(CR)mo... A non-equilibrium atmospheric pressure argon(Ar)plasma excited by microsecond pulse is studied experimentally by laser scattering and optical emission spectroscopy(OES),and theoretically by collisional-radiative(CR)model.More specifically,the electron temperature and electron density of plasma are obtained directly by the laser Thomson scattering,the gas temperature is measured by laser Raman scattering,the optical emissions of excited Ar states of plasma are measured by OES.The laser scattering results show that the electron temperature is about 1 eV which is similar to that excited by 60 Hz AC power,but the gas temperature is as low as 300 K compared to about 700 K excited by 60 Hz AC power.It is shown that the microsecond pulsed power supply,rather than nanosecond ones,is short enough to reduce the gas temperature of atmospheric pressure plasma to near room temperature.The electron temperature and electron density are also obtained by CR model based on OES,and find that the intensities of the optical emission intensity lines of 727.41,811.73,841.08,842.83,852.44 and 912.86 nm of Ar can be used to characterize the behavior of electron density and electron temperature,it is very useful to quickly estimate the activity of the atmospheric pressure Ar plasma in many applications. 展开更多
关键词 plasma diagnosis laser Thomson scattering atmospheric pressure plasma
Acute Kidney Injury (AKI) in the Setting of Multi-Organ Dysfunction Syndrome (MODS) Secondary to Yellow Fever Infection (YFI) in a 19-Year-Old Woman 认领
12
作者 Peter K. Uduagbamen Charles J. Elikwu +3 位作者 Adesola T. Oyelese Marion I. Ogunmola Tunde E. Thompson Tolulope E. Falana 《生物科学与医学(英文)》 2020年第9期142-148,共7页
<strong>Background: </strong>Outbreak of yellow fever infection (YFI), a mosquito-borne disease, occurs sporadically worldwide especially in tropical nations. Acute kidney injury (AKI) commonly results fro... <strong>Background: </strong>Outbreak of yellow fever infection (YFI), a mosquito-borne disease, occurs sporadically worldwide especially in tropical nations. Acute kidney injury (AKI) commonly results from YFI and could be associated with a poor prognosis for victims even under intensive care unit (ICU). Pathophysiologic mechanisms for AKI include hypovolemic shut down, cytotoxicity, acute tubular necrosis (ATN), hemolysis, or coagulopathy. Early diagnosis, prompt and effective treatment modalities including dialysis improve treatment outcome. <strong>Aim: </strong>We report the case management of a 19-year-old woman who had yellow fever infection complicated by acute kidney injury in the setting of multi-organ dysfunction syndrome (MODS). <strong>Case Presentation: </strong>A 19-year-old woman who presented with fever, headache and vomiting for 2 weeks. In the course of the illness, urine volume became reduced and coke colored, followed by body swelling, yellowness of the eyes bleeding from the orifices. Examination revealed an acutely ill looking woman, icteric, and with pedal edema. Her pulse was 100/min and blood pressure was 120/80 mmHg. Liver was enlarged, soft and tender. She had proteinuria 3+ and polymerase chain reaction (PCR) confirmed yellow fever infection. She had markedly deranged serum biochemical parameters for which she had a three-hour session of hemodialysis with Heparin anticoagulation. The urea reduction ratio (URR) was 46.9%. Barrier nursing was commenced. She had 7 units of whole blood and a pint of fresh frozen plasma (FFP) with antibiotics, Rabeprazole, Tranexamic acid, Vitamin K and Frusemide. She had the second dialysis session of HD and entered into the recovering phase of AKI and was subsequently discharged after 18th days on admission. <strong>Conclusion: </strong>Yellow fever infection occurs sporadically and could lead to MODS involving the kidneys, liver and hematologic system. Prompt initiation of dialysis, correction of coagulopathy, and antibiotics use are measures needed to 展开更多
关键词 Acute Kidney Injury Acute Tubular Necrosis DIALYSIS Yellow Fever Virus Fresh Frozen Plasma
在线阅读 免费下载
Subtenon Injection of Autologous Platelet-Rich Plasma in Retinitis Pigmentosa: Is It a New Therapeutic Option? 认领
13
作者 Neslihan Sinim Kahraman Ayse Oner 《眼科学期刊(英文)》 2020年第1期77-88,共12页
Purpose: Growth factors (GFs) and neurotrophins can decelerate retinal degeneration. This study aimed to investigate the safety, efficacy and durability of subtenon injections of autologous platelet-rich plasma (aPRP)... Purpose: Growth factors (GFs) and neurotrophins can decelerate retinal degeneration. This study aimed to investigate the safety, efficacy and durability of subtenon injections of autologous platelet-rich plasma (aPRP) which is a rich source of GFs in retinitis pigmentosa (RP) patients. Methods: 154 eyes of 77 RP patients with various degrees of narrowed visual field were investigated in this study. Each patient received three injections with 4-week intervals and followed for at least 12 months. The examinations and the tests were obtained before the injection, 1 month after the third injection and every 3 months during the study. The primary aim was to evaluate the effects of aPRP on visual acuity (VA) and visual functions, the second aim was to estimate the duration of the therapy effect and the need for additional aPRP injection. Results: Median age of the 77 RP patients was 35.2 ± 13.9 years. All of the eyes received 3 monthly bilateral subtenon aPRP injections. Of these patients 26 received an additional one, 12 received additional two and 1 patient received additional 3 injections with 3-month interval. There were no significant ocular or systemic side effects. The mean baseline VA was 0.22 ± 0.18 Snellen lines. It improved to 0.31 ± 0.19 following three aPRP injections, which was statistically significant. At the end of the study period, the mean VA was 0.27 ± 0.22 Snellen lines. Conclusion: The subtenon injection of aPRP might be an effective therapy and might have a positive influence in the preservation of visual functions and visual acuity of RP patients. 展开更多
关键词 RETINITIS Pigmentosa Growth Factors Platelet-Rich Plasma Visual Functions
在线阅读 免费下载
Laser-induced liquid tin discharge plasma and its EUV spectra 认领
14
作者 王均武 王新兵 +1 位作者 左都罗 Vassily Zakharov 《中国光学快报:英文版》 SCIE EI CAS CSCD 2020年第5期40-43,共4页
Laser-induced discharge plasmas(LDPs) have the potential to be inspection and metrology sources in extreme ultraviolet(EUV) lithography. An LDP EUV source was developed to avoid tin electrode erosion in which a tin po... Laser-induced discharge plasmas(LDPs) have the potential to be inspection and metrology sources in extreme ultraviolet(EUV) lithography. An LDP EUV source was developed to avoid tin electrode erosion in which a tin pool was used as a cathode. A CO2 pulse laser was focused on the liquid tin target surface, and then a breakdown occurred in a very short time. The voltage-current characteristics of the discharge oscillated, lasting for several microseconds, and an RLC fitting model was used to obtain the inductance and resistance. An intensified chargecoupled device(ICCD) camera was used to investigate the dynamics of LDP, which can explain the formation of a discharge channel. The EUV spectra of laser-induced liquid tin discharge plasma were detected by a grazing incident ultraviolet spectrometer, compared with a laser-produced tin droplet plasma EUV spectrum. To explain the EUV spectrum difference of laser-induced liquid tin discharge plasma and laser-produced tin droplet plasma,the collision radiation(CR) model combined with COWAN code was used to fit the experimental EUV spectrum, which can estimate the electron temperature and density of the plasma. 展开更多
关键词 laser induced discharge plasma voltage-current characteristics liquid tin plasma plume extreme ultraviolet spectra
Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge 认领
15
作者 Trung Nguyen TRAN Bounyang OANTHAVINSAK +1 位作者 Shinichiro KADO Hiroto MATSUURA 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第11期36-41,共6页
In this study,the effects of the fluid cooling and electric field line deformation were investigated in a dielectric barrier discharge(DBD)plasma source.The DBD plasma jet is improved by covering the ground electrode ... In this study,the effects of the fluid cooling and electric field line deformation were investigated in a dielectric barrier discharge(DBD)plasma source.The DBD plasma jet is improved by covering the ground electrode and a power electrode with insulating oil.We obtained positive results as insulating oil prevents arc formation,while it improved the supplied power and plasma jet length,and increased radical production.Radical production of this nonthermal plasma jet is studied with polyvinyl alcohol-potassium iodide liquid. 展开更多
关键词 atmospheric pressure plasma jet APPJ Lissajous figure dielectric barrier discharge plasma plume
Numerical investigation on electron effects in the mass transfer of the plasma species in aqueous solution 认领
16
作者 王晓龙 谭震宇 +1 位作者 韩佳奇 李晓彤 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第11期103-113,共11页
The objective of this work is to contribute an understanding of the effects of electrons in the plasmas on the mass transfer of plasma species in aqueous solution by means of the numerical simulation based on a one-di... The objective of this work is to contribute an understanding of the effects of electrons in the plasmas on the mass transfer of plasma species in aqueous solution by means of the numerical simulation based on a one-dimensional diffusion-reaction model.The plasma species are divided into two groups,i.e.electrons and the other species,and the mass transfer in the three scenarios has been simulated,including the systematic calculations of the depth distributions of five major reactive species,OH,O3,HO2,O2^-,and H2O2.In the three scenarios,the particles considered to enter into aqueous solution are all the plasma species(the scenario Ⅰ,where the mass transfer of plasma species is a result due to the synergy of the electrons and the other plasma species),the other species(the scenario Ⅱ),and only electrons in plasma species(the scenario Ⅲ),respectively.The detailed analyses on the difference between the depth distributions of each reactive species in these three scenarios show the following conclusions.The electrons play an important role in the mass transfer of plasma species in aqueous solution and the synergy of the electrons and the other plasma species(the electron-species synergy)presents its different effects on the mass transfer.The vast majority of H2O2 are generated from a series of the electronrelated reactions in aqueous solution,which is hardly affected by the electron-species synergy.Compared to the results when only the electrons enter into the liquid region,the electron-species synergy evidently weakens the generation of O2^-,O3,and OH,but promotes to produce HO2. 展开更多
关键词 plasma species electron effect mass transfer aqueous solution plasma biomedicine
Development and performance characterization of a compact plasma focus based portable fast neutron generator 认领
17
作者 Rishi VERMA Ekansh MISHRA +4 位作者 Prosenjit DHANG Basanta Kumar DAS Manraj MEENA Lakshman RONGALI Archana SHARMA 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第11期127-135,共9页
The design details and performance characterization results of a newly developed plasma focus based compact and portable system(0.5 m×0.5 m×1.2 m,weighing≈100 kg)that produces an average neutron yield of~2&... The design details and performance characterization results of a newly developed plasma focus based compact and portable system(0.5 m×0.5 m×1.2 m,weighing≈100 kg)that produces an average neutron yield of~2×10^8 neutrons/shot(of fast D-D neutrons with typical energy~2.45 Me V)at~1.8 k J energy discharge are reported.From the detailed analysis of the experimental characterization and simulation results of this system,it has been conclusively revealed that specifically in plasma focus devices with larger static inductance:(i)pinch current is a reliable and more valid neutron yield scaling parameter than peak current,(ii)the ratio of pinch/peak current improves as static inductance of the system reduces,(iii)the benign role of the higher static/pinch inductance ratio enables the supply of inductively stored energy in densely pinched plasma with a larger time constant and it is well depicted by the extended dip observed in the discharge current trace,(iv)there is the need to redefine existing index values of the pinch(Ipinch^4.7)and peak(Ipeak^3.9)currents in neutron yield scaling equations to higher values. 展开更多
关键词 plasma focus neutrons time of flight pinch current peak current plasma pinch pseudospark switch
Direct electron acceleration by chirped laser pulse in a cylindrical plasma channel 认领
18
作者 胡永南 成丽红 +3 位作者 姚征伟 张小波 张爱霞 薛具奎 《中国物理B:英文版》 SCIE EI CAS CSCD 2020年第8期255-263,共9页
We study the dynamics of single electron in an inhomogeneous cylindrical plasma channel during the direct acceleration by linearly polarized chirped laser pulse.By adjusting the parameters of the chirped laser pulse a... We study the dynamics of single electron in an inhomogeneous cylindrical plasma channel during the direct acceleration by linearly polarized chirped laser pulse.By adjusting the parameters of the chirped laser pulse and the plasma channel,we obtain the energy gain,trajectory,dephasing rate and unstable threshold of electron oscillation in the channel.The influences of the chirped factor and inhomogeneous plasma density distribution on the electron dynamics are discussed in depth.We find that the nonlinearly chirped laser pulse and the inhomogeneous plasma channel have strong coupled influence on the electron dynamics.The electron energy gain can be enhanced,the instability threshold of the electron oscillation can be lowered,and the acceleration length can be shortened by chirped laser,while the inhomogeneity of the plasma channel can reduce the amplitude of the chirped laser. 展开更多
关键词 chirped laser pulse plasma channel laser-plasma interaction electron acceleration
等离子体处理医疗垃圾技术的研究 认领
19
作者 李新艳 赵红涛 +2 位作者 张盟娟 吕高锋 窦晓熙 《化工管理》 2020年第31期63-64,共2页
随着社会经济的发展,医疗垃圾的种类和数量逐年增多,因此研究和开发一种彻底、高效、经济的处理医疗垃圾的技术手段显得尤为迫切。文章介绍了传统各种医疗垃圾处理方法的不足,分析了等离子体技术处理医疗垃圾的原理及优势,探讨了等离子... 随着社会经济的发展,医疗垃圾的种类和数量逐年增多,因此研究和开发一种彻底、高效、经济的处理医疗垃圾的技术手段显得尤为迫切。文章介绍了传统各种医疗垃圾处理方法的不足,分析了等离子体技术处理医疗垃圾的原理及优势,探讨了等离子体技术处理医疗垃圾的工艺及特点,最后对我国等离子体技术处理医疗垃圾早日实现产业化应用提出几点建议。 展开更多
关键词 等离子体 医疗垃圾 等离子体反应器
在线阅读 下载PDF
Controlling fine particles in flue gas from lead-zinc smelting by plasma technology 认领
20
作者 竹涛 王若男 +4 位作者 张星 韩一伟 牛文凤 薛泽宇 王礼锋 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2020年第4期24-32,共9页
With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by co... With the aim of controlling the problem of fine particles in the flue gas of lead-zinc smelting,a low-temperature plasma-electrocoagulation and electric bag composite dedusting experimental platform was designed by combining electrocoagulation and electric bag composite dust removal technology based on the research of low-temperature plasma technology.Firstly,the properties of fine particles in flue gas from lead-zinc smelting were analyzed,and the effects of input voltage,filter wind speed,dust concentration,and pulse-jet ash-cleaning cycle on the dust collection efficiency of the integrated device were studied.Then,the energy efficiency of the integrated technology was analyzed,and the control mechanism of the fine particles was revealed.The experimental results show that the integrated technology of low-temperature plasma-electrocoagulation and electric bag composite dust removal achieves a fine particle removal efficiency of more than 99.99%and the energy consumption per unit mass of the dust is only 0.008 k W·h/g.The integrated technology has broad application prospects and farreaching practical significance for the lead-zinc smelting industry to achieve ultra-low emission targets for flue gas and achieve energy-saving and emission reduction effects. 展开更多
关键词 lead-zinc SMELTING smoke fine particles LOW-TEMPERATURE PLASMA LOW-TEMPERATURE plasma-electrocoagulation and electric BAG compound dust removal integrated technology
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈