检索结果-南通市图书馆

Predictions of H-mode access and edge pedestal instability in the EHL-2 spherical torus

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2025年第02期 59-68页

作者：王嵎民李凯黄卓刘一良戴舒宇张洁黄艳清顾翔赵毅航徐帅王二辉郭栋石跃江谢华生梁云峰刘敏胜 the EHL-2 Team Hebei Key Laboratory of Compact fusion ENN Science and Technology Development Co. Ltd. Centre for Theoretical and Computational Physics College of Physics Qingdao University College of Computer Science South-Central Minzu University Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education)School of Physics Dalian University of Technology department of Plasma Physics and fusion Engineering University of Science and Technology of China College of Physics and Electronic Engineering Hengyang Normal University Forschungszentrum Jülich GmbH Institute of Fusion Energy and Nuclear Waste Management-Plasmaphysik

The EHL-2 spherical torus is designed to demonstrate proton-boron(p-11B) fusion within a compact spherical *** planned heating system includes a negative ion-based neutral beam injection（N-NBI）,two positive ion-based NBI systems（P-NBI）,electron cyclotron resonance heating（ECRH）,ion cyclotron resonance heating（ICRH）,and high harmonic fast wave（HHFW）,with a total power output of 31 *** to scaling law estimates,the device is capable of achieving H-mode *** plasma density,ne,min,at the minimum LH power threshold,PLH,is estimated to be 4.4× *** pedestal parameters were calculated using the REPED *** B as the primary impurity ion,the predicted pedestal width and height are lower compared to the typical case with carbon *** pedestal collisionality for EHL-2 is estimated to range between 0.06 and 0.17,indicating the potential for significant energy loss due to edge localized modes（ELMs）.The heat flux on the divertor plate has been calculated using the JOREK *** peak heat fluxes during ELM bursts are approximately 31.0 MW/m2at the lower inboard target and 39.5 MW/m2at the lower outboard target.A preliminary design of the resonant magnetic perturbation（RMP） coils has been completed to both control type-Ⅰ ELMs and correct error *** system comprises 16coils arranged into 2×4 *** ELM control mode,a 14/2 component is generated at 1.7 G/kAt,with a current of 4.9 kA required to achieve σChirikov=1 at the resonant surface,where the normalized poloidal magnetic flux is *** error field（EF） modulation mode,2/1 and 3/1components are generated at 3.5 G/kAt and 2.8 G/kAt,respectively.

关键词：

Nonlinear dynamics of the reversed shear Alfvén eigenmode in burning plasmas

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2024年第5期26卷 1-16页

作者：王涛魏士朝 Sergio BRIGUGLIO Gregorio VLAD Fulvio ZONCA 仇志勇 Institute for fusion Theory and Simulation and School of Physics Zhejiang UniversityHangzhou 310027People’s Republic of China Center for Nonlinear Plasma Science ENEA C.R.FrascatiFrascati 00044Italy fusion and nuclear safety department ENEA C.R.FrascatiFrascati 00044Italy

In a tokamak fusion reactor operated at steady state,the equilibrium magnetic field is likely to have reversed shear in the core region,as the noninductive bootstrap current profile generally peaks *** reversed shear Alfvén eigenmode(RSAE)as a unique branch of the shear Alfvén wave in this equilibrium,can exist with a broad spectrum in wavenumber and frequency,and be resonantly driven unstable by energetic particles(EP).After briefly discussing the RSAE linear properties in burning plasma condition,we review several key topics of the nonlinear dynamics for the RSAE through both wave-EP resonance and wave-wave coupling channels,and illustrate their potentially important role in reactor-scale fusion *** means of simplified hybrid MHD-kinetic simulations,the RSAEs are shown to have typically broad phase space resonance structure with both circulating and trapped EP,as results of weak/vanishing magnetic shear and relatively low *** the route of wave-EP nonlinearity,the dominant saturation mechanism is mainly due to the transported resonant EP radially decoupling with the localized RSAE mode structure,and the resultant EP transport generally has a convective *** saturated RSAEs also undergo various nonlinear couplings with other collective *** typical routes as parametric decay and modulational instability are studied using nonlinear gyrokinetic theory,and applied to the scenario of spontaneous excitation by a finite amplitude pump *** RSAEs could naturally couple and induce the spectral energy cascade into a low frequency Alfvénic mode,which may effectively transfer the EP energy to fuel ions via collisionless Landau ***,zero frequency zonal field structure could be spontaneously excited by modulation of the pump RSAE envelope,and may also lead to saturation of the pump RSAE by both scattering into stable domain and local distortion of the continuum structure.

关键词： reversed shear Alfvén eigenmode energetic particle nonlinear gyrokinetic theory saturation burning plasma

Neutron and Ion Beams Emitted from Plasma Focus (112.5 J) Device

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2010年第1期12卷 1-5页

作者： G.M.EL-ARAGI Plasma Physics and nuclear fusion department Nuclear Research Center

Preliminary results of recent experiments performed within the Mather-type 112.5 J plasma focus device are presented. The ion beams from the focus device operated with deuterium filling at 1 mbar were registered using CR-39 solid state nuclear track detectors （SSNTD） and a Faraday cup detector for time-resolved measurements. The time-resolved neutron emission from the focus region measurements was detected with a photomultiplier tube （IP-28） optically coupled with a plastic scintillator NE 102.

关键词： plasmas neutron scintillator detectors photomultiplier Faraday

Overview of the physics design of the EHL-2 spherical torus

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2025年第02期 9-28页

作者：梁云峰谢华生石跃江顾翔姜欣辰董力立王雪韵杨丹可刘文军孙恬恬王嵎民李直蔡剑青宋显明谭沐芝杨光赵寒月董家齐彭元凯宋绍栋陈正元李颖颖刘兵罗迪杨圆明刘敏胜 Jianqing CAI Zhengyuan CHEN Jiaqi DONG Lili DONG Kaiming FENG Xingxin GE Xiang GU Dong GUO Lei HAN Hairong HUANG Kunwei HUANG Xianli HUANG Xinchen JIANG Dongxu LI Hongyue LI Pengmin LI Songjian LI Yingying LI Zhi LI Yunfeng LIANG Bing LIU Minsheng LIU Shuo LIU Wenjun LIU Yong LIU Xiuchun LUN Di LUO Wenwu LUO Yueng-Kay Martin PENG Ji QI Yuejiang SHI Shaodong SONG Xianming SONG Tiantian SUN Muzhi TAN Renyi TAO Hanqing WANG Xueyun WANG Yu WANG Yumin WANG Xiao XIAO Huasheng XIE Qifeng XIE Danke YANG Enwu YANG Guang YANG Xu YANG Yuanming YANG Baoshan YUAN Hong ZANG Wenwei ZHANG Hanyue ZHAO Xin ZHAO Yihang ZHAO Peihai ZHOU Hongfeng ZHU Xiaojun ZHU Debu BANERJEE Zhongyong CHEN Shuyu DAI Di HU Jiankun HUA Yanqing HUANG Zhuo HUANG Kai LI Li LI Chengyue LIU Tong LIU Yiliang LIU Zhifang LIN Haojie MA Zhiwei MA Erhui WANG Feng WANG Fuqiong WANG Zhengxiong WANG Shuai XU Qingwei YANG Jie ZHANG Pingwei ZHENG Wei ZHENG Hebei Key Laboratory of Compact fusion Forschungszentrum Jülich GmbH Institute of fusion Energy and nuclear Waste Management-Plasmaphysik ENN Science and Technology Development Co. Ltd. Southwestern Institute of Physics DISAT Polytechnic University of Turin Huazhong University of Science and Technology Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education) School of Physics Dalian University of Technology Beihang University Hengyang Normal University College of Computer Science South-Central Minzu University Centre for Theoretical and Computational Physics College of Physics Qingdao University College of physics Donghua University School of Physics Hefei University of Technology School of Electrical Engineering& Automation Jiangsu Normal University School of Liberal Arts and Sciences North China Institute of Aerospace Engineering Zhejiang University department of Plasma Physics and fusion Engineering University of Science and Technology of China University of South China

ENN is planning the next generation experimental device EHL-2 with the goal to verify the thermal reaction rates of p-11B fusion,establish spherical torus/tokamak experimental scaling laws at 10's keV ion temperature,and provide a design basis for subsequent experiments to test and realize the p-11B fusion burning *** on 0-dimensional（0-D） system design and 1.5-dimensional transport modelling analyses,the main target parameters of EHL-2 have been basically determined,including the plasma major radius,R0,of 1.05 m,the aspect ratio,A,of 1.85,the maximum central toroidal magnetic field strength,B0,of 3 T,and the plasma toroidal current,Ip,of 3 *** main heating system will be the neutral beam injection at a total power of 17 *** addition,6 MW of electron cyclotron resonance heating will serve as the main means of local current drive and MHD instabilities *** physics design of EHL-2 is focused on addressing three main operating scenarios,i.e.,（1） high ion temperature scenario,（2） high-performance steady-state scenario and（3） high triple product *** scenario will integrate solutions to different important issues,including equilibrium configuration,heating and current drive,confinement and transport,MHD instability,p-11B fusion reaction,plasma-wall interactions,*** that,there are several unique and significant challenges to address,including● establish a plasma with extremely high core ion temperature(Ti,0> 30 keV),and ensure a large ion-to-electron temperature ratio(Ti,0/Te,0> 2),and a boron concentration of 10%-15% at the plasma core;● realize the start-up by non-inductive current drive and the rise of MA-level plasma toroidal *** is because the volt-seconds that the central solenoid of the ST can provide are very limited;● achieve divertor heat and particle fluxes control including complete detachment under high P/R（> 20 MW/m） at relatively low electron *** overview will introduce the advanced progress in the ph

关键词：

Effective nucleus-nucleus potentials for heavy-ion fusion reactions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

nuclear Science and Techniques 2025年第2期36卷 103-111页

作者： Ning Wang Jin-Ming Chen Min Liu Present Address:department of Physics Guangxi Normal UniversityGuilin 541004China Guangxi Key Laboratory of nuclear Physics and Technology Guilin 541004China

Based on the Skyrme energy density functional and reaction Q-value,this study proposed an effective nucleus-nucleus poten-tial for describing the capture barrier in heavy-ion fusion *** 443 extracted barrier heights were well reproduced with a root-mean-square(RMS)error of 1.53 MeV,and the RMS deviations with respect to 144 time-dependent Hartree-Fock capture barrier heights were only 1.05 *** with the Siwek-Wilczyński formula,wherein three parameters were determined by the proposed effective potentials,the measured capture cross sections at energies around the barriers were reasonably well reproduced for several fusion reactions induced by nearly spherical nuclei as well as by nuclei with large deformations,such as^(154)Sm and^(238)*** shallow capture pockets and small values of the average barrier radii resulted in the reduction of the capture cross sections for 52,54Cr-and 64 Ni-induced reactions,which were related to the synthesis of new super-heavy nuclei.

关键词： Nucleus-nucleus potential fusion reactions Superheavy nuclei Capture cross sections

Effect of High-Frequency Electric Field on Propagation of Electrostatic Wave in a Non-Uniform Relativistic Plasma Waveguide

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2008年第3期10卷 278-283页

作者： Kh.H.EL-SHORBAGY Plasma Physics and nuclear fusion department Nuclear Research Center Atomic Energy Authority Cairo Egypt

The effect of a high frequency （HF） electric field on the propagation of electrostatic wave in a 2D non-uniform relativistic plasma waveguide is investigated. A variable separation method is applied to the two-fluid plasma model. An analytical study of the reflection of electrostatic wave propagation along a magnetized non-uniform relativistic plasma slab subjected to an intense HF electric field is presented and compared with the case of a non relativistic plasma. It is found that, when the frequency of the incident wave is close to the relativistic electron plasma frequency, the plasma is less reflective due to the presence of both an HF field and the effect of relativistic electrons. On the other hand, for a low-frequency incident wave the reflection coefficient is directly proportional to the amplitude of the HF field. Also, it is shown that the relativistic electron plasma leads to a decrease in the value of reflection coefficient in comparison with the case of the non relativistic plasma.

关键词： electrostatic wave relativistic plasma waveguide reflection coefficient separation method

Non-Perturbative Guiding Center and Stochastic Gyrocenter Transformations:Gyro-Phase Is the Kaluza-Klein 5^(th) Dimension also for Reconciling General Relativity with Quantum Mechanics

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Physics 2018年第4期9卷 701-752页

作者： Claudio Di Troia enea Fusion and Nuclear Safety DepartmentC.R.FrascatiItaly

The non perturbative guiding center transformation is extended to the relativistic regime and takes into account electromagnetic fluctuations. The main solutions are obtained in covariant form: the gyrating particle and the guiding particle solutions, both in gyro-kinetic as in MHD orderings. Moreover, the presence of a gravitational field is also considered. The way to introduce the gravitational field is original and based on the Einstein conjecture on the feasibility to extend the general relativity theory to include electromagnetism by geometry, if applied to the extended phase space. In gyro-kinetic theory, some interesting novelties appear in a natural way, such as the exactness of the conservation of a magnetic moment, or the fact that the gyro-phase is treated as the non observable fifth dimension of the Kaluza-Klein model. Electrodynamics becomes non local, without the inconsistency of self-energy. Finally, the gyrocenter transformation is considered in the presence of stochastic e.m. fluctuations for explaining quantum behaviors via Nelson’s approach. The gyrocenter law of motion is the Schrödinger equation.

关键词： Guiding Center Transformation Gyrocenter Transformation Kaluza-Klein General Relativity Higher Dimensions Stochastic Quantum Mechanics Schrodinger Equation Lorentz’s Force Law

Unexpanded nonlinear electromagnetic gyrokinetic equations for magnetized plasmas

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2020年第10期22卷 1-4页

作者： Liu CHEN Fulvio ZONCA Haotian CHEN Institute for fusion Theory and Simulation and department of Physics Zhejiang UniversityHangzhou 310027People’s Republic of China department of Physics and Astronomy University of CaliforniaIrvineCA 92697United States of America enea Fusion and Nuclear Safety DepartmentC.R.FrascatiVia E.Fermi 4500044 Frascati(Roma)Italy Institute of Space Science and Technology Nanchang UniversityNanchang 330031.People's Republic of China

Nonlinear electromagnetic gyrokinetic equations have been constructed without expanding the field variables into background and finite but small-amplitude fluctuating components. At the long-wavelength limit, these unexpanded nonlinear gyrokinetic equations recover the wellknown drift-kinetic equations. At the expanded limit, they recover the usual nonlinear gyrokinetic equations. These equations can therefore be applied to long-term simulations covering from microscopic to macroscopic spatial scales.

关键词： gyrokinetic theory plasma turbulence nonlinear phenomena

Cross-focusing of two chirped Gaussian laser beams and THz wave generation in plasmas of multi-ion species under a weakly relativistic and ponderomotive regime

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2022年第10期24卷 1-11页

作者： M R JAFARI MILANI S REZAEI M J JAFARI Photonics and Quantum technologies Research School Nuclear Science and Technology Research InstituteTehran 14665-678Iran Plasma and fusion Research School Nuclear Science and Technology Research InstituteTehran 14399-51113Iran

The generation of terahertz(THz)waves via the beating of two high-intensity chirped Gaussian lasers in a multi-ion-species plasma is numerically studied by taking into account the weak relativistic and ponderomotive regime of *** coupled differential equations for beamwidth parameters are extracted by introducing the dielectric function of such plasma and using WKB and paraxial ray *** amplitude of THz radiation at beat frequency resulting from the nonlinear current density induced by the beat ponderomotive force of the cross-focusing of beams was *** impacts of the chirp frequency parameter,initial laser intensity and initial ionic species density(specifically,the presence of singly and doubly charged ions)in the plasma on THz generation were *** numerical results reveal that THz radiation generation strongly depends on the chirp frequency parameter.A specific range of chirp frequencies exists for self-focusing as well as THz generation with a'turning point',where the THz emission reaches its maximum *** results show that the strength of self-focusing and consequently the generated THz radiation are reduced by increasing the density of doubly charged ionic species in the plasma due to the suppression of the nonlinear effects.

关键词： laser–plasma interaction THz generation chirped Gaussian laser beams