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A brief review:experimental investigation of zonal flows and geodesic acoustic modes in fusion plasmas
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作者 K J ZHAO J Q DONG +1 位作者 J Q LI L W YAN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2018年第9期72-84,共13页
Zonal flows self-generated by turbulence play an important role in regulating turbulence,reducing transport level,and thus improve plasma confinement in fusion plasmas.The zonal flows and geodesic acoustic modes have ... Zonal flows self-generated by turbulence play an important role in regulating turbulence,reducing transport level,and thus improve plasma confinement in fusion plasmas.The zonal flows and geodesic acoustic modes have been identified in various devices.The related issues,such as the poloidal and toroidal symmetries,coupling to turbulence,effects on turbulence and transport,nonlinear energy transfer between turbulence and zonal flows,dependence of the plasma parameters,roles in the confinement regime transitions etc are overviewed briefly in this paper.The interaction between zonal flows and magnetic islands is emphasized. 展开更多
关键词 zona flow TOKAMAK TURBULENCE fusion plasma
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Kinetic Alfvén waves in a deuterium-tritium fusion plasma with slowing-down distributed α-particles
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作者 Fei-Fei Lu San-Qiu Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第3期392-398,共7页
The dispersion relation and damping rate of kinetic Alfvén waves(KAWs) in a deuterium-tritium fusion plasma with slowing-down distributed α-particles are investigated using the kinetic theory. The variations of ... The dispersion relation and damping rate of kinetic Alfvén waves(KAWs) in a deuterium-tritium fusion plasma with slowing-down distributed α-particles are investigated using the kinetic theory. The variations of wave frequency and damping rate with respect to the α concentration(n_(α)/n_(e)) and perpendicular wave number(k_(⊥)) are studied from a numerical way. The results show that the fluctuation of α concentration slightly affects the frequency and damping rate of KAWs at low n_(α)/n_(e). In addition, the frequency and the damping rate increase as the k_(⊥) and the background temperature Te increase. For comparison, the calculations are performed also in the case of α-particles following an equivalent Maxwellian distribution. For a given k_(⊥), the value of the frequency obtained in the slowing-down distribution case is smaller than that obtained in the Maxwellian distribution case. Conversely, the value of the damping rate obtained in the slowing-down distribution case is slightly larger than that obtained in the Maxwellian distribution case. 展开更多
关键词 kinetic Alfvén wave dispersion relation deuterium-tritium fusion plasma
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Quantum Transport Theory for Fusion Plasmas
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作者 Keh-Ning Huang Hsiao-Ling Sun +1 位作者 Sheng-Fang Lin Hao-Tse Shiao 《Journal of Energy and Power Engineering》 2013年第6期1172-1177,共6页
Fundamental quantum transport equation for impact-ionization processes in fusion plasmas is formulated in the actor-spectator description. The density-matrix formulism is adopted to treat both coherent and incoherent ... Fundamental quantum transport equation for impact-ionization processes in fusion plasmas is formulated in the actor-spectator description. The density-matrix formulism is adopted to treat both coherent and incoherent effects in a unified fashion. Quantum electrodynamic effects are also considered for high-temperature scenarios. Electron-impact ionization of uranium ion U91+ and proton-impact ionization of hydrogen are given as examples. 展开更多
关键词 Quantum collision impact ionization density matrix QED (quantum electrodynamic) effects fusion plasmas.
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Implosion Plasma Driven Fusion Pellet of Inertial Confinement(A Short Memorandum)
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作者 Rahele Zadfathollah Seyed Kamal Mousavi Balgehshiri +2 位作者 Ali Zamani Paydar Masoud J.Moghaddam Bahman Zohuri 《Journal of Energy and Power Engineering》 2023年第1期15-26,共12页
The implosion plasma drive fusion pellet of inertial confinement is a concept related to nuclear fusion,a process in which atomic nuclei combine to form heavier nuclei,releasing a large amount of energy in the process... The implosion plasma drive fusion pellet of inertial confinement is a concept related to nuclear fusion,a process in which atomic nuclei combine to form heavier nuclei,releasing a large amount of energy in the process.The implosion plasma drive fusion pellet is a potential fuel source for achieving controlled nuclear fusion.ICF(inertial confinement fusion)is a technique used to achieve fusion by compressing a small target containing fusion fuel to extremely high densities and temperatures using lasers or other methods.The implosion plasma drive fusion pellet concept involves using a small pellet of deuterium and tritium(two isotopes of hydrogen)as fusion fuel,and then rapidly heating and compressing it using a pulsed power system.The implosion process creates a high-pressure plasma that ignites the fusion reactions,releasing energy in the form of neutrons and charged particles.The resulting energy can be captured and used for power generation.This technology is still in the experimental stage,and significant research and development is required to make it commercially viable.However,it has the potential to provide a virtually limitless source of clean energy with no greenhouse gas emissions or long-term radioactive waste.Be that as it may,ICF has to get exact control of the implosion process,mitigate insecurities,and create modern materials and advances to resist the extraordinary conditions of the combined response. 展开更多
关键词 plasma fusion plasma driven fusion magnetic reconnection TOKAMAK magnetic confinement fusion ICF
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Induction System for a Fusion Reactor: Quantum Mechanics Chained up
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作者 Friedrich Björn Grimm 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第1期158-166,共9页
In the quest for a sustainable and abundant energy source, nuclear fusion technology stands as a beacon of hope. This study introduces a groundbreaking quantum mechanically effective induction system designed for magn... In the quest for a sustainable and abundant energy source, nuclear fusion technology stands as a beacon of hope. This study introduces a groundbreaking quantum mechanically effective induction system designed for magnetic plasma confinement within fusion reactors. The pursuit of clean energy, essential to combat climate change, hinges on the ability to harness nuclear fusion efficiently. Traditional approaches have faced challenges in plasma stability and energy efficiency. The novel induction system presented here not only addresses these issues but also transforms fusion reactors into integrated construction systems. This innovation promises compact fusion reactors, marking a significant step toward a clean and limitless energy future, free from the constraints of traditional power sources. This revolutionary quantum induction system redefines plasma confinement in fusion reactors, unlocking clean, compact, and efficient energy production. 展开更多
关键词 fusion Reactor plasma Confinement Quantum Mechanics Clean Energy
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Positions Open in the Field of Plasma and Fusion
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《Plasma Science and Technology》 SCIE EI CAS CSCD 2004年第5期i001-i001,共1页
Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is sear... Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is searching for 5 senior and 10 junior scientists of plasma and fusion in the following superconducting tokamak research areas: theory and simulation, diverter and edge physics, plasma diagnostics, electron cyclotron resonant heating, ion cyclotron resonant heating, lower hybrid wave, neutral beam injection, reactor design, fusion material, superconducting engineering. 展开更多
关键词 Positions Open in the Field of plasma and fusion OPEN
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Positions Open in the Field of Plasma and Fusion
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《Plasma Science and Technology》 SCIE EI CAS CSCD 2004年第6期i004-i004,共1页
Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is sear... Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is searching for 5 senior and 10 junior scientists of plasma and fusion in the following superconducting tokamak research areas: theory and simulation, diverter and edge physics, plasma diagnostics, electron cyclotron resonant heating, ion cyclotron resonant heating, lower hybrid wave, neutral beam injection, reactor design, fusion material, superconducting engineering. 展开更多
关键词 OPEN Positions Open in the Field of plasma and fusion
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Positions Open in the Field of Plasma and Fusion
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《Plasma Science and Technology》 SCIE EI CAS CSCD 2004年第3期i001-i001,共1页
Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important Laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is sear... Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), one of the most important Laboratories on magnetically confined fusion in China and the Nuclear Fusion Research Center of the World Laboratory, is searching for 5 senior and 10 junior scientists of plasma and fusion in the following superconducting tokamak research areas: theory and simulation, diverter and edge physics, plasma diagnostics, electron cyclotron resonant heating, ion cyclotron resonant heating, lower hybrid wave, neutral beam injection, reactor design, fusion material, superconducting engineering. 展开更多
关键词 OPEN Positions Open in the Field of plasma and fusion
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Nuclear Fusion Within Extremely Dense Plasma Enhanced by Quantum Particle Waves
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作者 苗峰 曾宪俊 邓柏权 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第5期366-371,共6页
Quantum effects play an enhancement role in p-p chain reactions occurring within stars. Such an enhancement is quantified by a wave penetration factor that is proportional to the density of the participating fuel part... Quantum effects play an enhancement role in p-p chain reactions occurring within stars. Such an enhancement is quantified by a wave penetration factor that is proportional to the density of the participating fuel particles. This leads to an innovative theory for dense plasma, and its result shows good agreement with independent data derived from the solar energy output. An analysis of the first Z-pinch machine in mankind's history exhibiting neutron emission leads to a derived deuterium plasma beam density greater than that of water, with plasma velocities exceeding 10000 km/s. Fusion power could be achieved by the intersection of four such pinched plasma beams with powerful head-on collisions in their common focal region due to the beam and target enhanced reaction. 展开更多
关键词 quantum effects fusion enhancement extremely dense plasma
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Cold Fusion Based on Matter-Antimatter Plasma Formed in Molecular Crystals 被引量:1
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作者 Mohamed Assaad Abdel-Raouf Abdelfattah T. Elgendy Amr Abd Al-Rahman Youssef 《Journal of High Energy Physics, Gravitation and Cosmology》 2022年第1期56-66,共11页
The main purpose of this work is to shed light on the possibility of producing huge amount of energy based on the construction matter-antimatter plasma in a molecular crystal. It is assumed that two beams of isotherma... The main purpose of this work is to shed light on the possibility of producing huge amount of energy based on the construction matter-antimatter plasma in a molecular crystal. It is assumed that two beams of isothermal hydrogen and antihydrogen are injected into a palladium crystal leading to a plasma state composed of particles and antiparticles. The collapse of this state releases a huge amount of energy which can be used as fuel for space shuttles. Thus, the novel system of isothermal pressure interaction enhances the energy power carried out by the quantum ion acoustic soliton (QIAS). In addition to the energy power released from the particle-antiparticle annihilation. The probability of merging the energy from these two cases is available at certain condition. The released energy may be a significant step in solving the energy scape of Tokomak to produce fusion energy. The study starting from the one-dimensional quantum hydrodynamic model (in which the term of electron-positron and proton-antiproton for hydrogen-antihydrogen is included), a Korteweg de Vries equation (kdv) is derived, the QIAS energy experiences and the annihilation energy power are calculated. It is found that the total energy of QIAS and the energy resulting from hydrogen-antihydrogen annihilation are important step towards the establishment of a cold fusion power station. 展开更多
关键词 Cold fusion Annihilation Energy plasma Energy Ion-Acoustic plasma Cold and Hot plasma Matter-Antimatter plasma in Molecular Crystals Fuel for Space Shuttles in Palladium Crystals
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碱熔-电感耦合等离子体质谱法测定铌钽矿中铌钽锂铍 被引量:1
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作者 李振 钟莅湘 +1 位作者 崔承洋 李志伟 《矿产综合利用》 CAS 2024年第3期200-205,共6页
这是一篇矿物分析测试领域的论文。建立了碱熔-电感耦合等离子体质谱法同时测定铌钽矿中铌钽锂铍的快速测定方法。采用过氧化钠:氢氧化钠=1:1的混合熔剂分解样品,水提取使铌钽等元素完全形成沉淀,与液体分离,采用10%硫酸+10%过氧化氢溶... 这是一篇矿物分析测试领域的论文。建立了碱熔-电感耦合等离子体质谱法同时测定铌钽矿中铌钽锂铍的快速测定方法。采用过氧化钠:氢氧化钠=1:1的混合熔剂分解样品,水提取使铌钽等元素完全形成沉淀,与液体分离,采用10%硫酸+10%过氧化氢溶液25 mL转化沉淀和溶液后用电感耦合等离子体质谱仪测定样品中铌、钽、锂、铍元素的含量。采用该方法测定国家一级标准物质GBW 07153、GBW 07155、GBW 07185,各元素的测定值与认定值基本一致,相对误差为0.50%~4.77%,相对标准偏差(n=6)为-0.009%~0.008%,适用于铌钽精矿、难分解或复杂样品中铌钽等元素的测定,并在生产实践中进行了应用。 展开更多
关键词 矿物分析测试 碱熔 电感耦合等离子体质谱法
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微观组织对叠片结构钨基面向等离子体材料的热疲劳效应的影响
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作者 祁超 马玉田 +2 位作者 齐艳飞 肖善曲 王波 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第11期101-109,共9页
钨(W)作为面向等离子体材料的最佳候选者,对热冲击载荷的响应是未来聚变装置研究中的重要问题.在热负荷作用下,钨基面向等离子体材料(W-based plasma-facing material,W-PFM)的表面会产生热损伤,包括脆性开裂和疲劳裂纹.本文提出了抑制W... 钨(W)作为面向等离子体材料的最佳候选者,对热冲击载荷的响应是未来聚变装置研究中的重要问题.在热负荷作用下,钨基面向等离子体材料(W-based plasma-facing material,W-PFM)的表面会产生热损伤,包括脆性开裂和疲劳裂纹.本文提出了抑制W-PFM热损伤的新方案,即叠片结构W-PFM方案.利用电子束设备对不同厚度和热处理工艺的W箔组成的叠片结构W进行了热疲劳实验.样品施加功率密度为48 MW/m^(2)的热脉冲,循环5000次.随着W箔片厚度的减小,叠片结构W表面的裂纹损伤减轻.叠片结构W在循环热载荷作用后表面产生的主裂纹均近似平行于箔片厚度方向.厚度较小的W箔表面只有主裂纹,厚度较大的W箔表面除了出现主裂纹外,还会形成裂纹网络,且主裂纹宽度较大.最终选取热损伤区域的扫描电子显微镜图像,并利用计算机图片处理软件和分析软件,对表面热疲劳裂纹损伤进行了定量分析.发现相同厚度下应力态W的裂纹面积最小,裂纹数量最少,说明去应力态W的抗辐照损伤能力最强.实验结果还表明,除了微观组织的影响,叠片结构W-PFM的单轴应力状态和裂纹阻断机制也都对其热疲劳性能的提高有所贡献. 展开更多
关键词 聚变 面向等离子体材料 热疲劳
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基于挠性梁结构的电推进器推力测量方法研究
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作者 王洛麒 郑金星 +7 位作者 刘海洋 李飞 孟东东 陆玉东 杜宜凡 唐卓尧 吴涛 史佳明 《核技术》 EI CAS CSCD 北大核心 2024年第5期91-101,共11页
电推进系统在空间任务中相比于传统化学燃料推进工作寿命更长、燃料消耗更低,在近年来备受关注。但基于可控核聚变思想研发的高功率霍尔效应电推进器,其推力很难测量,原因在于这些电推进器需要在高温环境下电离推进剂,所以工作时会产生... 电推进系统在空间任务中相比于传统化学燃料推进工作寿命更长、燃料消耗更低,在近年来备受关注。但基于可控核聚变思想研发的高功率霍尔效应电推进器,其推力很难测量,原因在于这些电推进器需要在高温环境下电离推进剂,所以工作时会产生高温等离子体羽流,导致传统推力测试方法无法准确测量其推力。推进器推力的准确测量直接关系到航天器姿态以及轨道保持的控制精度,因此必须在地面测试中准确地测量推力。本文设计并搭建了一套基于挠性梁结构的推力测量平台,可以在高温环境下测量电推进器产生的推力。实验结果表明,以可变比冲磁等离子体火箭为例,在中心磁场强度0.2 T、质量流率为20 mg·s-1的工况下,实时测得电推进器推力为266.5 mN,证明了测量平台的可行性,为后续电推进器推力测量实验提供参考。 展开更多
关键词 电推进器 可控核聚变 等离子体 挠性梁 推力测量
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毫米波功率应用研究进展(特邀)
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作者 鲁钝 傅文杰 +3 位作者 Mikhail Glyavin 唐相伟 胡旻 刘盛纲 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 2024年第4期503-519,共17页
微波功率应用是一种直接利用微波的功率和能量与物质互作用的应用。近年来,随着毫米波功率源技术的发展,微波功率应用逐渐向毫米波频段发展。由于毫米波波长较短,在功率应用中展现出诸多独特特性,并发展出一系列独特应用。本文对毫米波... 微波功率应用是一种直接利用微波的功率和能量与物质互作用的应用。近年来,随着毫米波功率源技术的发展,微波功率应用逐渐向毫米波频段发展。由于毫米波波长较短,在功率应用中展现出诸多独特特性,并发展出一系列独特应用。本文对毫米波在物理科学、材料科学、生物医学等领域的研究工作进行了评述,主要包括聚变等离子体加热与诊断、材料加工与分析、生物效应应用等,对目前研究和发展中的主要瓶颈问题进行了介绍,并对未来发展进行了展望。 展开更多
关键词 真空电子器件 毫米波 功率应用 聚变等离子体 材料加工与分析 生物效应 研究进展
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面向等离子体钨基材料热负荷损伤研究进展
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作者 尹怡 秦思贵 +2 位作者 史英丽 于宏新 徐世伟 《粉末冶金技术》 CAS CSCD 北大核心 2024年第3期242-254,共13页
在核聚变反应堆运行过程中,面向等离子体钨基材料需要承受住一定次数稳态和瞬态热负荷的冲击而不发生开裂、熔化等损伤,因此改善面向等离子体钨基材料的力学性能及高温稳定性是极其重要的,主要手段包括合金强化、弥散强化、纤维增韧、... 在核聚变反应堆运行过程中,面向等离子体钨基材料需要承受住一定次数稳态和瞬态热负荷的冲击而不发生开裂、熔化等损伤,因此改善面向等离子体钨基材料的力学性能及高温稳定性是极其重要的,主要手段包括合金强化、弥散强化、纤维增韧、第二相强化、复合强化等。本文分析了合金强化、弥散强化等改性手段对钨基材料热负荷损伤行为的影响,总结了各种强化手段的优势和不足,并对面向等离子体掺杂钨基材料热负荷损伤行为进行了展望。 展开更多
关键词 核聚变 面向等离子体材料 热负荷 合金化 弥散强化
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低杂波注入对剥离气球模的作用
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作者 樊浩 陈少永 +3 位作者 牟茂淋 刘泰齐 张业民 唐昌建 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第9期204-215,共12页
基于BOUT++代码研究了托卡马克高约束模等离子体中低杂波(LHW)注入对边缘台基区剥离气球模(P-B模)线性和非线性特性的影响.模拟中分别考虑了LHW驱动的常规主等离子体电流和刮削层螺旋电流丝(HCF)产生三维扰动磁场对P-B模的作用.线性结... 基于BOUT++代码研究了托卡马克高约束模等离子体中低杂波(LHW)注入对边缘台基区剥离气球模(P-B模)线性和非线性特性的影响.模拟中分别考虑了LHW驱动的常规主等离子体电流和刮削层螺旋电流丝(HCF)产生三维扰动磁场对P-B模的作用.线性结果表明,LHW驱动的主等离子体电流通过降低平衡的归一化压强梯度和磁剪切,使得线性环向模谱整体向高模数和低增长率的方向移动.非线性模拟表明,由于线性模谱的展宽,LHW驱动的主等离子体电流对P-B模不同模式具有整体的抑制效果,可以降低边缘局域模(ELM)造成的台基能量损失;LHW驱动HCF产生的三维扰动磁场可以通过增强不同模式之间的耦合,促进主模之外的其他模式增长来降低ELM造成的能量损失.研究发现,HCF产生的三维扰动磁场促进增长的P-B模式集中在较高模数,当P-B模的主导模式远离此模数区间,ELM能量损失降低更明显.研究结果有助于深入理解LHW控制ELM实验中的物理机制. 展开更多
关键词 磁约束聚变等离子体 边缘局域模 低杂波 剥离气球模
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基于超级电容器的充放电电路系统研制及其在EAST限制器探针测量中的应用
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作者 张问博 刘少承 +6 位作者 廖亮 魏文崟 李乐天 王亮 颜宁 钱金平 臧庆 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第6期258-269,共12页
EAST限制器探针安装在低场侧限制器,在环向上共有两个阵列,可以同时工作在悬浮电位测量、离子饱和流测量和扫描单探针模式.当朗缪尔静电探针运行在离子饱和流测量模式时,需要为其提供稳定的偏压.本文采用大容量电容器为探针提供偏压,相... EAST限制器探针安装在低场侧限制器,在环向上共有两个阵列,可以同时工作在悬浮电位测量、离子饱和流测量和扫描单探针模式.当朗缪尔静电探针运行在离子饱和流测量模式时,需要为其提供稳定的偏压.本文采用大容量电容器为探针提供偏压,相比于其他磁约束聚变装置上使用的9 V干电池组,大容量电容器具有电压设置灵活、易于维护和环保等优点.为此,研发和测试了整套超级电容器的充放电控制电路.本文还基于Python语言开发了超级电容器充放电控制电路的控制软件,通过该软件可以实现对电路的远程控制和自动控制.经实验测试,电容器充放电控制电路可以在长脉冲放电条件下为探针输出稳定的偏压,适用于磁约束聚变的复杂电磁环境.通过将超级电容器充放电控制电路应用于EAST限制器探针诊断,测量了2.45 GHz和4.6 GHz两种低杂波加热条件下刮削层等离子体离子饱和流、悬浮电位、电子温度和密度等特征参数的三维分布,发现2.45 GHz低杂波加热时刮削层电子密度较高,而双波协同加热时刮削层电子密度最高.这一系列测试与物理实验充分验证了超级电容器充放电控制电路的可靠性和稳定性. 展开更多
关键词 朗缪尔探针 超级电容器 磁约束聚变等离子体 托卡马克
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增材制造Ti6Al4V合金的闪速等离子体电解氧化与在生理介质中的电化学行为
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作者 H.MORA-SANCHEZ C.RAMOS +3 位作者 M.MOHEDANO B.TORRES R.ARRABAL E.MATYKINA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第4期1150-1166,共17页
研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(PEO)处理及其电化学行为。通过短时间(<120 s)PEO处理(也称闪速PEO),在AM合金和传统合金表面制备了3~10μm厚、含Ca和P的涂层。然后在... 研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(PEO)处理及其电化学行为。通过短时间(<120 s)PEO处理(也称闪速PEO),在AM合金和传统合金表面制备了3~10μm厚、含Ca和P的涂层。然后在改良的α-MEM溶液中,通过动电位极化曲线和电化学阻抗谱(EIS)评估了合金的电化学行为。与传统合金相比,AM合金中形成了细小的层片状α显微组织和层间小尺寸的β相颗粒,这促使了火花的产生,从而促进了PEO涂层的生长。闪速PEO涂层提高了传统合金和AM合金的耐腐蚀性,最薄的涂层(<3μm)提供了高达3倍的保护。AM Ti6Al4V由于其高的晶界密度,易受局部缝隙腐蚀的影响。而即使短至35 s的闪速PEO处理也足以成功避免这种情况。 展开更多
关键词 增材制造 激光粉末床熔融 等离子体电解氧化 闪速PEO 缝隙腐蚀 α-MEM
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电感耦合等离子体原子发射光谱(ICP-AES)法测定石煤钒矿石中钒、铁、钛的含量 被引量:2
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作者 严慧 戴长文 +3 位作者 叶明 王干珍 汤行 邓飞跃 《中国无机分析化学》 北大核心 2024年第3期324-329,共6页
研究一种快速准确测定石煤钒矿石中钒、铁、钛含量的方法对石煤钒矿检测行业的发展和石煤钒矿资源的开发利用、综合评价具有重要的意义。试样经过氧化钠在650℃完全熔融后保持1~3 min,取出冷却,热水浸提,盐酸酸化,定容稀释,选择V 292.40... 研究一种快速准确测定石煤钒矿石中钒、铁、钛含量的方法对石煤钒矿检测行业的发展和石煤钒矿资源的开发利用、综合评价具有重要的意义。试样经过氧化钠在650℃完全熔融后保持1~3 min,取出冷却,热水浸提,盐酸酸化,定容稀释,选择V 292.402 nm、Fe 259.940 nm、Ti 334.941 nm为分析谱线,利用电感耦合等离子体原子发射光谱法(ICP-AES),建立了石煤钒矿石中同时测定钒、铁、钛含量的方法。优化了钒、铁、钛元素的分析谱线和背景校正模式,采用全程序样品空白稀释配制的校准曲线消除盐度钠基影响;研究了坩埚、熔剂种类、直接碱熔与灼烧-碱熔前处理方式、酸度效应的影响。结果表明:方法检出限为0.009%~0.019%,定量限为0.027%~0.057%;铁、钛、钒3种元素浓度在0.10~30.0μg/mL时,校准曲线线性回归方程的相关系数均大于0.9999;采用国家一级标准物质(GBW07876、GBW07877、GBW07878)进行验证,相对标准偏差(RSD,n=12)为0.49%~0.87%,且测定值与标准值吻合。方法具有快速简便、精密度好、准确度高、同时测定钒、铁、钛等优点,满足石煤钒矿石化学分析检测需求,且可为石煤钒矿化学分析标准方法的建立提供技术支撑。 展开更多
关键词 过氧化钠 碱熔 石煤钒矿 电感耦合等离子体原子发射光谱法
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磁约束燃烧等离子体物理的现状与展望
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作者 孙有文 仇志勇 万宝年 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第17期1-13,共13页
本文从设计和运行托卡马克聚变堆需求的角度,简要概述了托卡马克高约束运行方案和高能量粒子约束涉及的关键物理的发展现状和挑战.过去几十年中,托卡马克高约束模式物理研究取得了重要进展,明确了聚变堆运行区的主要稳定性和约束的限制... 本文从设计和运行托卡马克聚变堆需求的角度,简要概述了托卡马克高约束运行方案和高能量粒子约束涉及的关键物理的发展现状和挑战.过去几十年中,托卡马克高约束模式物理研究取得了重要进展,明确了聚变堆运行区的主要稳定性和约束的限制条件及其性能优化的主要调控手段,发展了感应、混合和稳态等若干可能适用于未来托卡马克聚变堆的运行方案.在反应堆阿尔法粒子加热主导的条件下,潜在主导阿尔法粒子输运损失的阿尔芬不稳定性的线性谱特征和激发机制得到了充分的理解;在阿尔芬不稳定性的非线性饱和、阿尔法粒子约束,及通过加热沉积和微观湍流对等离子体约束的影响等方面开展了大量的实验和理论探索.当前,磁约束聚变物理已进入临近点火燃烧等离子体研究的新阶段,面临着全新的挑战,如:聚变堆条件下如何实现高能量阿尔法粒子对等离子体有效自加热;在阿尔法粒子自加热为主条件下,如何通过调控等离子体关键参数分布维持等离子体稳定性和高约束性能,实现聚变堆高效安全运行;能否建立全尺度模型,实现聚变堆复杂等离子体的长时间动力学过程的准确预测等.这些关键问题的解决,可为未来聚变堆的设计和运行奠定坚实的物理基础,同时推动等离子体学科的发展. 展开更多
关键词 磁约束核聚变 托卡马克 燃烧等离子体物理 运行方案
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