托卡马克等离子体环向转动对测地声模的影响
作者：
谢宝艺;余俊;龚学余;陈铀;余江妹
期刊：
核聚变与等离子体物理 ,2017年37(1):8-13 ISSN：0254-6086
作者机构：
南华大学数理学院,衡阳,421001;[龚学余] 南华大学数理学院,衡阳 421001;[龚学余] 南华大学核科学技术学院,衡阳 421001;[陈铀; 余江妹; 余俊; 谢宝艺] 南华大学
关键词：
环向转动;测地声模;低频模;声波分支;无碰撞阻尼
摘要：
采用回旋动理学方程推导得到了环向转动托卡马克等离子体中测地声模的色散关系,分析了环向转动对测地声模、低频模和声波分支的频率以及无碰撞阻尼率的影响。结果表明,测地声模的频率会随着环向转动马赫数而逐渐增大,而其无碰撞阻尼率则会随着环向转动马赫数而迅速减小。此外,低频模和声波分支的频率以及无碰撞阻尼率都会随着环向转动马赫数而逐渐减小,其中环向转动对声波分支的频率以及无碰撞阻尼率的影响非常小,基本上可以忽略。
语种：
中文
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Electron collisionless damping of the geodesic acoustic mode in rotating tokamak plasmas
作者：
Xie, Baoyi;Guo, Wenfeng* ;Gong, Xueyu;Yu, Jun;Chen, You;...
期刊：
Nuclear Fusion ,2016年56(12):124001 ISSN：0029-5515
通讯作者：
Guo, Wenfeng
作者机构：
[Chen, You; Xie, Baoyi; Gong, Xueyu; Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Guo, Wenfeng] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.;[Gong, Xueyu; Cao, Jinjia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Guo, Wenfeng] C;Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
关键词：
Damping;Electrons;Geodesy;Magnetoplasma;Plasma theory;Rotation;Safety factor;Tokamak devices;Collisionless;Dispersion relations;Electron dynamics;Electron response;Frequency up shift;Geodesic acoustic modes;Number of electrons;Toroidal rotation;Collisionless plasmas
摘要：
Collisionless damping of the geodesic acoustic mode due to electron dynamics in rotating tokamak plasmas is investigated. A dispersion relation of the geodesic acoustic mode with a non-adiabatic electron response in a rotating tokamak is derived and solved both analytically and numerically. It is found that the collisionless damping of the geodesic acoustic mode, due to electron dynamics, significantly increases with the increasing toroidal rotation, especially in the large safety factor regime. The rotation-induced frequency up-shift of the geodesic acoustic mode increases the resonant velocity, which enables a larger number of electrons to resonate with the geodesic acoustic mode. The significant increase of the number of the resonant electrons significantly enhances the collisionless damping of the geodesic acoustic mode. The result indicates that in rotating tokamak plasmas a more complete picture of the geodesic acoustic mode should include the electron dynamics. © 2016 IAEA, Vienna.
语种：
英文
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Kinetic theory of passing energetic ion transport in presence of the resonant interactions with a rotating magnetic island
作者：
Cao, Jinjia* ;Wang, Aike;Gong, Xueyu;Xiang, Dong;Huang, Qianhong;...
期刊：
PHYSICS OF PLASMAS ,2016年23(1):012301 ISSN：1070-664X
通讯作者：
Cao, Jinjia
作者机构：
[Xiang, Dong; Huang, Qianhong; Gong, Xueyu; Cao, Jinjia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Aike] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China.;[Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Cao, Jinjia] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
plasma collision processes;plasma flow;plasma kinetic theory;plasma transport processes
摘要：
The enhanced transport of passing energetic ions (PEIs) in presence of the resonant interactions with a rotating magnetic island is investigated within the drift kinetic framework. When the island rotation plays a role in the resonant interaction, we find that the velocities of PEIs satisfy a constraint relation of resonant flux surface in phase space. The resonant flux surfaces overlap with the magnetic flux surfaces in real space. A new transport channel responsible for the PEIs moving across the magnetic flux surfaces, i.e., continuously overlapping, is found. Two kinds of radial motions can be induced by the surface overlapping: one arises from the coupling between the resonance and the collision with the background plasma and the other from not completely overlapping of the two surfaces. The two radial motions and the symmetry-breaking induced radial motion constitute the total radial motion. When the pitch-angle scattering rate is very weak, the surface-shear induced transport is dominant. Only a small increase in the collision rate can significantly influence the total transport. ©2016 AIP Publishing LLC.
语种：
英文
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The transport characteristics of passing fast ions produced by nonlocal overlapping of drift island surfaces and magnetic island surfaces
作者：
Cao, Jinjia;Gong, Xueyu* ;Xiang, Dong;Huang, Qianhong;Yu, Jun
期刊：
PHYSICS OF PLASMAS ,2016年23(8):082301 ISSN：1070-664X
通讯作者：
Gong, Xueyu
作者机构：
[Xiang, Dong; Huang, Qianhong; Gong, Xueyu; Cao, Jinjia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Gong, Xueyu] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
plasma interactions;plasma transport processes
摘要：
The structure of the drift-island surface of passing fast ions (PFIs) is investigated in the presence of the resonant interaction with a magnetic island. Two overlapping regions of the drift-island surface and the magnetic island surface are found, one corresponding to local overlapping region and the other to non-local one. Here, the word "nonlocal" denotes that the resonances in the core plasma can have effects on the PFIs near the plasma boundary, while the "local" represents that the PFIs just near the resonant location are influenced. The nonlocal overlapping constructs a transport path along which the PFIs can become losses. There are three kinds of drift-island surfaces to join in forming the transport paths. A pitch angle region, which is called pitch angle gap, is found near the plasma boundary, where the drift-island surface cannot be formed and few PFIs are lost. The pitch-angle selective features of PFI losses are obtained by analyzing the three kinds of drift-island surfaces. The coupling between the crowd drift island surfaces and the collision can induce the prompt losses of PFIs and rapidly slowing down of PFI energy. The time of the prompt losses and the slowing down rate are calculated. Qualitatively, the theoretical results are in well agreement with the experimental observations in ASDEX Upgrade [M. García-Muñoz et al., Nucl. Fusion 47, L10 (2007)]. ©2016 Author(s).
语种：
英文
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托卡马克等熵平衡条件下等离子体环向转动对带状流的影响
作者：
谢宝艺;余俊;龚学余;陈铀;余江妹
期刊：
核聚变与等离子体物理 ,2016年36(3):208-212 ISSN：0254-6086
作者机构：
南华大学数理学院,衡阳,421001;[龚学余] 南华大学数理学院，衡阳 421001;南华大学核科学技术学院，衡阳 421001;[龚学余] 南华大学核科学技术学院，衡阳 421001;[陈铀; 余江妹; 余俊; 谢宝艺] 南华大学
关键词：
环向转动;等熵平衡;测地声模;低频带状流;声波
摘要：
采用流体模型理论推导了等熵平衡条件下环向转动托卡马克等离子体中带状流的色散关系。从理论上分析了环向转动对测地声模、低频带状流和声波的频率、压力和密度扰动量的影响。结果表明,环向转动对低频带状流的频率没有影响,但会使测地声模的频率逐渐增大。此外,存在环向转动时,低频带状流会具有驻波形式的压力和密度扰动量,且测地声模和声波可以沿着极向传播。而且还发现,等熵平衡可以看成是等温平衡的一种特殊情况。
语种：
中文
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Collisional damping of the geodesic acoustic mode with toroidal rotation. II. Gyrokinetic formulation
作者：
Xie, Baoyi;Yu, Jun;Gong, Xueyu* ;Guo, Wenfeng;Chen, You
期刊：
PHYSICS OF PLASMAS ,2016年23(3):032504 ISSN：1070-664X
通讯作者：
Gong, Xueyu
作者机构：
[Chen, You; Xie, Baoyi; Gong, Xueyu; Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Gong, Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Guo, Wenfeng] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
通讯机构：
[Gong, Xueyu] U;Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
damping;plasma collision processes;plasma flow;plasma kinetic theory;plasma toroidal confinement;Tokamak devices
摘要：
The collisional damping of the geodesic acoustic mode (GAM) is analytically investigated in toroidally rotating tokamaks by using the gyrokinetic equation. It is found that the toroidal rotation could decrease the collisional damping of the GAM in the small safety factor region and increase the collisional damping of the GAM in the large safety factor region at low ion collision rate;while at high ion collision rate, the toroidal rotation will increase the collisional damping of the GAM with arbitrary safety factor. Furthermore, the change quantity of collisional damping rate of the GAM due to the toroidal rotation at high collision rate is larger than that at low collision rate. ©2016 AIP Publishing LLC.
语种：
英文
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Collisional damping of the geodesic acoustic mode with toroidal rotation. I. Viscous damping
作者：
Gong, Xueyu;Xie, Baoyi;Guo, Wenfeng;Chen, You;Yu, Jiangmei;...
期刊：
PHYSICS OF PLASMAS ,2016年23(3):032503 ISSN：1070-664X
通讯作者：
Yu, Jun
作者机构：
[Gong, Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Chen, You; Yu, Jiangmei; Xie, Baoyi; Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Guo, Wenfeng] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
通讯机构：
[Yu, Jun] U;Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
dispersion relations;Mach number;plasma flow;plasma toroidal confinement;Tokamak devices
摘要：
With the dispersion relation derived for the geodesic acoustic mode in toroidally rotating tokamak plasmas using the fluid model, the effect of the toroidal rotation on the collisional viscous damping of the geodesic acoustic mode is investigated. It is found that the collisional viscous damping of the geodesic acoustic mode has weak increase with respect to the toroidal Mach number. ©2016 AIP Publishing LLC.
语种：
英文
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Low frequency zonal flow excitation by drift waves in tokamak plasmas with toroidal rotation
作者：
Yu, Jun* ;Gong, Xueyu;Chen, You
期刊：
Nuclear Fusion ,2015年55(2):023015 ISSN：0029-5515
通讯作者：
Yu, Jun
作者机构：
[Chen, You; Gong, Xueyu; Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Gong, Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yu, Jun] U;Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
关键词：
Dispersion (waves);Dispersions;Growth rate;Plasma confinement;Plasma theory;Plasma waves;Rotation;Tokamak devices;Turbulence;Finite amplitude;Geodesic acoustic modes;Nonlinear dispersion relation;Nonlinear growth rates;Nonlinear terms;Tokamak plasmas;Toroidal rotation;Zonal flows;Magnetoplasma
摘要：
With the nonlinear dispersion relation derived, excitation of low frequency zonal flow by drift waves is examined in tokamak plasmas with toroidal rotation. It is shown that the growth rate of the low frequency zonal flow is decreased by the frequency shift of the geodesic acoustic mode and is increased by the additional nonlinear terms with toroidal rotation velocity. If the amplitude of the pump drift wave is greater than the threshold value, which is the function of the Mach number of the toroidal rotation, the toroidal rotation increases the nonlinear growth rate, otherwise, it decreases the nonlinear growth rate. There is always a finite nonlinear growth rate of the low frequency zonal flow if only there is a finite amplitude of the pump wave in tokamak plasmas with a finite velocity of the toroidal rotation. © 2015 IAEA.
语种：
英文
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托卡马克等离子体极向转动对带状流的影响
作者：
余江妹;余俊;龚学余;谢宝艺;张能
期刊：
核技术 ,2015年38(10):100602-1-100602-5 ISSN：0253-3219
作者机构：
[余江妹; 谢宝艺; 张能] School of Mathematics and Physics, University of South China, Hengyang, 421001, China;[龚学余] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
关键词：
托卡马克;带状流;频率;等离子体极向转动
摘要：
采用理想磁流体力学模型,利用绝热近似方法,推导出托卡马克等离子体极向转动体系中带状流的色散方程,分析了极向转动对带状流产生的影响。结果表明,等离子体极向转动体系下,测地声模频率和声波频率都会随极向转动马赫数而增大。带状流的频率与采用等温近似时有一定的数值差别;测地声模的密度扰动量形式也发生变化,由静态体系中纯驻波的形式,变为由一个驻波和一个小振幅行波叠加的形式。
语种：
中文
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Transport study for passing energetic ions in presence of the resonant interactions with rotating magnetic islands
作者：
Cao, Jinjia* ;Wang, Aike;Gong, Xueyu;Xiang, Dong;Huang, Qianhong;...
期刊：
EPL ,2015年112(5):55001 ISSN：0295-5075
通讯作者：
Cao, Jinjia
作者机构：
[Xiang, Dong; Huang, Qianhong; Gong, Xueyu; Cao, Jinjia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Aike] Southwestern Inst Phys, Chengdu 610041, Peoples R China.;[Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Cao, Jinjia] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
EPL;Europhysics Letters
摘要：
The transport of passing energetic ions (EIs) in presence of the resonant interaction with a rotating magnetic island is studied within the frame of drift kinetics. The phase-space structure of the drift island induced by the resonances is first presented. New transport channels responsible for the transport of EIs are discovered when the drift island of phase space couples with the magnetic island in real space. When the pitch-angle scattering rate is very weak, the resonance-induced transport is dominant. Only a small increase in the collision rate can significantly influence the total transport.
语种：
英文
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Fully implicit iterative solving method for the fokker-planck equation in tokamak plasmas
作者：
Zheng Pingwei;Gong Xueyu* ;Yu Jun;Du Dan
期刊：
等离子体科学与技术：英文版 ,2014年16(11):1000-1006 ISSN：1009-0630
通讯作者：
Gong Xueyu
作者机构：
[Zheng Pingwei] Univ South China, Sch Environm Protect & Safety Engn, Hengyang 421001, Peoples R China.;[Gong Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Yu Jun; Gong Xueyu; Du Dan] Univ South China, Dept Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Gong Xueyu] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
tokamak plasmas;Fokker-Planck equation;current drive;benchmark
摘要：
A three dimensional bounce-averaged Fokker-Planck (FP) numerical code has been newly developed based on fully implicit iterative solving method, and relativistic effect is also included in the code. The code has been tested against various benchmark cases: Ohmic conductivity in the presence of weak Ohmic electric field, runaway losses of electrons in the presence of strong Ohmic electric field, lower hybrid current drive and electron cyclotron current drive via two- or three-dimensional simulation. All the test cases run fast and correctly during calculations. As a result, the code provides a set of powerful tools for studying radio frequency wave heating and current drive in tokamak plasmas.
语种：
英文
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Geodesic acoustic mode excitation by drift waves in tokamak plasmas with toroidal rotation
作者：
Yu, Jun* ;Gong, Xueyu
期刊：
Nuclear Fusion ,2013年53(12):123027 ISSN：0029-5515
通讯作者：
Yu, Jun
作者机构：
[Gong, Xueyu; Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Gong, Xueyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yu, Jun] U;Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
关键词：
Geodesic acoustic modes;Ideal magnetohydrodynamics;Nonlinear excitation;Nonlinear growth rates;Nonlinear terms;Radial wave numbers;Toroidal rotation;Toroidally rotating tokamak;Magnetohydrodynamics;Nonlinear equations;Plasma confinement;Plasma theory;Plasma waves;Rotation;Tokamak devices
摘要：
Nonlinear excitation of geodesic acoustic mode by drift waves is investigated in toroidally rotating tokamak plasmas using the ideal magnetohydrodynamic equations. It is found that both the radial wave number and the nonlinear growth rate of the driven geodesic acoustic mode increase with the speed of the toroidal rotation, where the decisive factor is the frequency shift of the geodesic acoustic mode induced by the toroidal rotation. The additional nonlinear terms induced by the toroidal rotation velocity make little effect, even though they promote the nonlinear excitation at all times. © 2013 IAEA, Vienna.
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英文
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East上的快波电流驱动扩散系数研究
作者：
尹岚;龚学余;余俊
期刊：
科学技术与工程 ,2013年13(30):8912-8915 ISSN：1671-1815
作者机构：
南华大学数理学院,衡阳,410000;[龚学余] 南华大学核科学与技术学院,衡阳,410000;[尹岚; 余俊] 南华大学
关键词：
电流驱动;准线性扩散系数
摘要：
针对East全超导托卡马克的参数,联合动力论和全波法数值模拟快波电流驱动,计算得到快波电流驱动的准线性扩散系数分布.结果说明East中通过选取恰当频率快波能有效的驱动电流,并对电流加以控制.
语种：
中文
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弱剪切环向转动托卡马克平衡方程研究
作者：
余俊
期刊：
数理医药学杂志 ,2013年26(1):29-31 ISSN：1004-4337
作者机构：
南华大学数理学院,衡阳,421001;[余俊] 南华大学
关键词：
托卡马克;环向转动;平衡方程;弱剪切
摘要：
为了理解环向转动对于托卡马克等离子体的影响,研究了弱剪切环向转动托卡马克等离子体平衡方程。对于较为典型的等离子体压强和电流分布,可以将弱剪切环向转动平衡方程化为Grad-Shafranov-Helmholtz方程的形式,其中参数a1和α2的值都包含了弱剪切环向转动效应,而a2则与没有环向转动时具有相同的物理意义。它可以形成单磁轴的嵌套磁面位形和多磁轴的电流反向平衡位形。
语种：
中文
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环向转动马赫数为常数时的托卡马克平衡位形
作者：
余俊;龚学余;李新霞;杜丹
期刊：
南华大学学报(自然科学版) ,2012年26(2):1-3 ISSN：1673-0062
作者机构：
南华大学数理学院,湖南衡阳,421001;南华大学核科学技术学院,湖南衡阳,421001;[李新霞; 龚学余; 杜丹; 余俊] 南华大学
关键词：
环向转动;平衡方程;马赫数
摘要：
在托卡马克等离子体环向转动的马赫数为常数的情况下,对于一定的等离子体压强和电流分布,平衡方程可以化为Grad-Shafranov-Helmholtz方程的形式,其中a1、a2与α的值与没有环向转动的情形均具有相同的物理意义.它可以形成单磁轴的传统嵌套磁面位形,也可以形成多磁轴的电流反向平衡位形.
语种：
中文
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Bootstrap current of fast ions in neutral beam injection heating
作者：
Huang, Qian-hong* ;Gong, Xue-yu;Yu, Jun;Li, Xin-xia
期刊：
PHYSICA SCRIPTA ,2012年85(5):055503 ISSN：0031-8949
通讯作者：
Huang, Qian-hong
作者机构：
[Gong, Xue-yu; Li, Xin-xia; Huang, Qian-hong] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Yu, Jun] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Huang, Qian-hong] U;Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要：
The bootstrap current of fast ions produced by neutral beam injection (NBI) is investigated in a large-aspect-ratio tokamak with circular cross-section under specific parameters. The bootstrap current density distribution and the total bootstrap current are reported. In addition, the beam bootstrap current always accompanies the electron return current due to the parallel momentum transfer from fast ions. With the electron return current taken into consideration, the net current density obviously decreases; at the same time, the peak of the current moves towards the central plasma. Numerical results show that the value of the net current depends sensitively not only on the angle of the NBI but also on the ratio of the velocity of fast ions to the critical velocity: the value of the net current is small for neutral beam parallel injection, but increases severalfold for perpendicular injection, and increases with increasing beam energy. © 2012 The Royal Swedish Academy of Sciences.
语种：
英文
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Excitation of geodesic acoustic mode continuum by drift wave turbulence
作者：
Yu, Jun* ;Dong, J. Q.;Li, X. X.;Du, D.;Gong, X. Y.
期刊：
Journal of Plasma Physics ,2012年78(6):651-655 ISSN：0022-3778
通讯作者：
Yu, Jun
作者机构：
[Du, D.; Yu, Jun] Univ S China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Dong, J. Q.] Zhejiang Univ, Inst Fus Theory & Simulat, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China.;[Dong, J. Q.] SW Inst Phys, Chengdu, Peoples R China.;[Li, X. X.; Gong, X. Y.] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yu, Jun] U;Univ S China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
关键词：
Coherent modes;Drift waves;Geodesic acoustic modes;Ion temperature;Radial structure;Wave-kinetic approach;Ions;Plasma simulation
摘要：
Excitation of the geodesic acoustic mode continuum by drift wave turbulence is studied using the wave kinetic approach. For a model profile of weak non-uniform ion temperature, the forms of growth rate and radial structure of geodesic acoustic modes are obtained analytically. The growth rate is analyzed for several conditions for present-day tokamaks and compared with that for uniform ion temperature, as well as that given by the coherent mode approach for non-uniform ion temperature.
语种：
英文
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测地声模连续谱参量激发过程的数值研究#@#@#Numerical Study of the Parametric Excitation of the Geodesic Acoustic Mode Continuum by Drift Wave
作者：
余俊;施文龙
期刊：
应用物理 ,2012年02(3):98-101 ISSN：2160-7567
作者机构：
南华大学数理学院;中国人民解放军63726部队
关键词：
测地声模连续谱;参量激发;漂移波Geodesic Acoustic Modes Continuum
摘要：
Abstract: The growth rate of the geodesic acoustic mode and the radial structures of the sideband drift waves and the geodesic acoustic modes continuum are studied as a parametric process in the tokamak plasmas with a non-uniform ion temperature profile for which the non-uniform part of the inherent geodesic acoustic mode frequency takes the form of sin function. It is shown that the radial structures of the drift wave sideband are close to the harmonic function, the en- ergies of the geodesic acoustic modes are mainly localized around the resonant points of the parametric excitations, and the growth rate is proportional to the square of the amplitude of the pump wave, which indicates that the corresponding analytical results is reasonable.#@#@#摘要: 为了验证Yu和Dong给出的解析结果的合理性，用数值计算的方法对离子温度为非均匀的等离子体中测地声模连续谱的非线性激发过程进行了研究。数值计算的结果表明，漂移波边带模的径向结构分布图与简谐振荡都很接近，这说明Yu和Dong对参量激发方程的解析求解的出发点是合理的。对于一定的离子温度分布，在一定共振频率的条件下，测地声模连续谱的增长率与漂移波的振幅的平方成正比，这和Yu和Dong给出的相关的解析结果的结论一致。根据所求出的漂移波边带模的径向分布，可以计算出测地声模的径向结构分布。计算的结果表明，测地声模连续谱的振幅在共振点附近具有最大值。
语种：
中文
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Theoretical analysis of the ICRH antenna's impedance matching for ELMy plasmas on EAST
作者：
Du, Dan* ;Gong, Xueyu;Wang, Zhenhua;Yu, Jun;Zheng, Pingwei
期刊：
Journal of Plasma Physics ,2012年78(6):595-599 ISSN：0022-3778
通讯作者：
Du, Dan
作者机构：
[Du, Dan; Yu, Jun] Univ S China, Dept Math & Phys, Hengyang City, Hunan, Peoples R China.;[Wang, Zhenhua; Gong, Xueyu] Univ S China, Dept Nucl Sci & Technol, Hengyang City, Hunan, Peoples R China.;[Zheng, Pingwei] Univ S China, Dept Environm Protect & Safety Engn, Hengyang City, Hunan, Peoples R China.
通讯机构：
[Du, Dan] U;Univ S China, Dept Math & Phys, Hengyang City, Hunan, Peoples R China.
关键词：
Antenna input impedance;Edgelocalized modes;ICRH antennas;Impedance mismatch;International thermonuclear experimental reactor;Ion cyclotron resonance heating;Radio frequency power;Real-time feedback;Rf-power;Steady-state plasmas;Superconducting tokamak;Antennas;Electric discharges;Impedance matching (electric);Optimization;Plasma diagnostics;Tokamak devices;Antenna feeders
摘要：
A well-optimized design of an ion cyclotron resonance heating (ICRH) antenna is very important for steady-state plasma heating with high radio frequency (RF) power of several tens of megawatts. However, a sharp decrease in the coupling RF power because of impedance mismatch of ICRH system is an issue that must be resolved for present-day fusion reactors and International Thermonuclear Experimental Reactor. This paper has theoretically analyzed the ICRH antenna's impedance matching for ELMy plasmas on experimental advanced superconducting tokamak (EAST) by the transmission line theory. The results indicate that judicious choice of the optimal feeder location is found useful for adjustable capacitors' tolerance to the variations of the antenna input impedance during edge-localized mode (ELM) discharge, which is expected to be good for the design of ICRH antenna system and for real-time feedback control during ELM discharge on EAST. Copyright © 2012 Cambridge University Press.
语种：
英文
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一种离子温度分布下的测地声模连续谱的参量激发
作者：
余俊;龚学余;黄千红
期刊：
南华大学学报(自然科学版) ,2012年26(3):5-8 ISSN：1673-0062
作者机构：
南华大学数理学院,湖南衡阳,421001;南华大学核科学技术学院,湖南衡阳,421001
关键词：
测地声模连续谱;参量激发;漂移波
摘要：
在离子温度为非均匀的等离子体中漂移波激发测地声模连续谱的过程中，对测地声模固有频率的径向分布函数的不均匀部分取双曲正切函数的情况，研究了漂移波边带模和测地声模连续谱的径向结构以及测地声模增长率．数值结果表明漂移波边带模的径向结构分布图都与简谐振荡都很接近，测地声模连续谱的能量都主要集中在参量激发的共振点附近，而测地声模增长率和泵波振幅的平方成正比．
语种：
中文
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