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等离子体科学和技术（英文版）
等离子体科学和技术（英文版）

万元熙、谢纪康

月刊

1009-0630

pst@ipp.ac.cn

0551-5591617，5593176

230031

合肥 中国科学院等离子体物理研究所PST编辑部

等离子体科学和技术（英文版）/Journal Plasma Science and TechnologyCSCD北大核心EISCI
查看更多>>“Plasma Science & Technology”（等离子体科学和技术）是中国科学院等离子体物理研究所主办的英文版学术期刊。其宗旨是向国内外报导我国等离子体科学界和国外科学家在高温等离子体、低温等离子体、天体空间等离子体、放电等离子体和激光等离子体等各个领域在基础研究、实验探索、装置建设和应用开发中所取得的具有新意的学术成果或阶段性成果，并刊登反映这些学科国际、国内发展新方向、新动态的综述，以及与等离子体有关的交叉学科和应用方面的最新成就等。
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    Investigation of an electrode-driven hydrogen plasma method for in situ cleaning of tin-based contamination

    彭怡超叶宗标王思蜀蒲国...
    73-83页
    查看更多>>摘要：To prolong the service life of optics,the feasibility of in situ cleaning of the multilayer mirror(MLM)of tin and its oxidized contamination was investigated using hydrogen plasma at different power levels.Granular tin-based contamination consisting of micro-and macroparticles was deposited on silicon via physical vapor deposition(PVD).The electrode-driven hydrogen plasma at different power levels was systematically diagnosed using a Langmuir probe and a retarding field ion energy analyzer(RFEA).Moreover,the magnitude of the self-biasing voltage was measured at different power levels,and the peak ion energy was corrected for the difference between the RFEA measurements and the self-biasing voltage(ERFEA-eVself).XPS analysis of O Is and Sn 3d peaks demonstrated the chemical reduction process after 1 W cleaning.Analysis of surface and cross-section morphology revealed that holes emerged on the upper part of the macroparticles while its bottom remained smooth.Hills and folds appeared on the upper part of the microparticles,confirming the top-down cleaning mode with hydrogen plasma.This study provides an in situ electrode-driven hydrogen plasma etching process for tin-based contamination and will provide meaningful guidance for understanding the chemical mechanism of reduction and etching.
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    Efficient activation of the Co/SBA-15 catalyst by high-frequency AC-DBD plasma thermal effects for toluene removal

    李越姜楠刘政妍秦亮...
    84-94页
    查看更多>>摘要：Dielectric barrier discharge(DBD)plasma excited by a high-frequency alternating-current(AC)power supply is widely employed for the degradation of volatile organic compounds(VOCs).However,the thermal effect generated during the discharge process leads to energy waste and low energy utilization efficiency.In this work,an innovative DBD thermally-conducted catalysis(DBD-TCC)system,integrating high-frequency AC-DBD plasma and its generated thermal effects to activate the Co/SBA-15 catalyst,was employed for toluene removal.Specifically,Co/SBA-15 catalysts are closely positioned to the ground electrode of the plasma zone and can be heated and activated by the thermal effect when the voltage exceeds 10 kV.At 12.4 kV,the temperature in the catalyst zone reached 261 ℃ in the DBD-TCC system,resulting in an increase in toluene degradation efficiency of 17％,CO2 selectivity of 21.2％,and energy efficiency of 27％,respectively,compared to the DBD system alone.In contrast,the DBD thermally-unconducted catalysis(DBD-TUC)system fails to enhance toluene degradation due to insufficient heat absorption and catalytic activation,highlighting the crucial role of AC-DBD generated heat in the activation of the catalyst.Furthermore,the degradation pathway and mechanism of toluene in the DBD-TCC system were hypothesized.This work is expected to provide an energy-efficient approach for high-frequency AC-DBD plasma removal of VOCs.
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    Particle-in-cell simulations of EUV-induced hydrogen plasma in the vicinity of a reflective mirror

    张宇强余新刚叶宗标
    95-103页
    查看更多>>摘要：Particle-In-Cell(PIC)simulations were performed in this work to study the dynamics of the EUV-induced hydrogen plasma.The Monte-Carlo Collision(MCC)model was employed to deal with the collisions between charged particles and background gas molecules.The dynamic evolution of the plasma sheath,as well as the flux and energy distribution of ions impacting on the mirror surface,was discussed.It was found that the emission of secondary electrons under the EUV irradiation on the ruthenium mirror coating creates a positively charged wall and then prevents the ions from impacting on the mirror and therefore changes the flux and energy distribution of ions reaching the mirror.Furthermore,gas pressure has a notable effect on the plasma sheath and the characteristics of the ions impinging on the mirrors.With greater gas pressure,the sheath potential decreases more rapidly.The flux of ions received by the mirror grows approximately linearly and at the same time the energy corresponding to the peak flux decreases slightly.However,the EUV source intensity barely changes the sheath potential,and its influence on the ion impact is mainly limited to the approximate linear increase in ion flux.
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    Analysis and verification of electrodynamic force,thermal stress and current sharing for CRAFT converter structure design

    王重马石朝毅张秀青卢文武...
    104-111页
    查看更多>>摘要：In the design realm of fusion power supplies,structural components play a pivotal role in ensuring the safety of fusion devices.To verify the reliability of the converter structure design at the Comprehensive Research Facility for Fusion Technology(CRAFT),meticulous analysis of the converter's dynamic impact is carefully performed based on the worst fault current(400 kA),firstly.Subsequently,the thermal stress analysis based on the maximum allowable steady-state temperature is finished,and the equivalent thermal stress,thermal deformation,maximum shear stress of a single bridge arm and the whole converter are studied.Furthermore,a simple research method involving the current-sharing characteristics of a bridge arm with multi-thyristor parallel connection is proposed using a combination of Simplorer with Q3D in ANSYS.The results show that the current-sharing characteristics are excellent.Finally,the structural design has been meticulously tailored to meet the established requirements.
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    Design of a 3D-printed liquid lithium divertor target plate and its interaction with high-density plasma

    苑聪聪叶宗标刘建星郭恒鑫...
    112-120页
    查看更多>>摘要：A liquid Li divertor is a promising alternative for future fusion devices.In this work a new divertor model is proposed,which is processed by 3D-printing technology to accurately control the size of the internal capillary structure.At a steady-state heat load of 10 MW m-2,the thermal stress of the tungsten target is within the bearing range of tungsten by finite-element simulation.In order to evaluate the wicking ability of the capillary structure,the wicking process at 600 ℃was simulated by FLUENT.The result was identical to that of the corresponding experiments.Within 1 s,liquid lithium was wicked to the target surface by the capillary structure of the target and quickly spread on the target surface.During the wicking process,the average wicking mass rate of lithium should reach 0.062 g s-1,which could even supplement the evaporation requirement of liquid lithium under an environment＞950 ℃.Irradiation experiments under different plasma discharge currents were carried out in a linear plasma device(SCU-PSI),and the evolution of the vapor cloud during plasma irradiation was analyzed.It was found that the target temperature tends to plateau despite the gradually increased input current,indicating that the vapor shielding effect is gradually enhanced.The irradiation experiment also confirmed that the 3D-printed tungsten structure has better heat consumption performance than a tungsten mesh structure or multichannel structure.These results reveal the application potential and feasibility of a 3D-printed porous capillary structure in plasma-facing components and provide a reference for further liquid-solid combined target designs.
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    Real-time data processing method for CO2 dispersion interferometer on EAST

    张家敏姚远刘郁阳储宇奇...
    121-126页
    查看更多>>摘要：A real-time data processing system is designed for the carbon dioxide dispersion interferometer(CO2-DI)on EAST.The system utilizes the parallel and pipelining capabilities of an field-programmable gate array(FPGA)to digitize and process the intensity of signals from the detector.Finally,the real-time electron density signals are exported through a digital-to-analog converter(DAC)module in the form of analog signals.The system has been successfully applied in the CO2-DI system to provide low-latency electron density input to the plasma control system on EAST.Experimental results of the latest campaign with long-pulse discharges on EAST(2022-2023)demonstrate that the system can respond effectively in the case of rapid density changes,proving its reliability and accuracy for future electron density calculation.
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