Electromagnetic particle simulation of the effect of toroidicity on linear mode conversion and absorption of lower hybrid waves

被引：12

作者：

Bao, J. ^{[1
,2
]}

Lin, Z. ^{[2
]}

Kuley, A. ^{[2
]}

Wang, Z. X. ^{[2
]}

机构：

[1] Peking Univ, Fus Simulat Ctr, Beijing 100871, Peoples R China

[2] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

NUCLEAR FUSION | 2016年 / 56卷 / 06期

关键词：

lower hybrid wave; particle-in-cell simulation; tokamak; RF-DRIVEN CURRENTS; PARAMETRIC-INSTABILITIES; NEOCLASSICAL TRANSPORT; TOKAMAK PLASMA; PROPAGATION; FREQUENCY; ELECTRON;

D O I：

10.1088/0029-5515/56/6/066007

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Effects of toroidicity on linear mode conversion and absorption of lower hybrid (LH) waves in fusion plasmas have been studied using electromagnetic particle simulation. The simulation confirms that the toroidicity induces an upshift of parallel refractive index when LH waves propagate from the tokamak edge toward the core, which affects the radial position for the mode conversion between slow and fast LH waves. Furthermore, moving LH antenna launch position from low field side toward high field side leads to a larger upshift of the parallel refractive index, which helps the slow LH wave penetration into the tokamak core. The broadening of the poloidal spectrum of the wave-packet due to wave diffraction is also verified in the simulation. Both the upshift and broadening effects of the parallel spectrum of the wave-packet modify the parallel phase velocity and thus the linear absorption of LH waves by electron Landau resonance.

引用

页数：11

共 56 条

[1] Detection of lower hybrid waves in the scrape-off layer of tokamak plasmas with microwave backscattering [J].

Baek, S. G. ;

Shiraiwa, S. ;

Parker, R. R. ;

Bonoli, P. T. ;

Marmar, E. S. ;

Wallace, G. M. ;

Dominguez, A. ;

Kramer, G. J. ;

Lau, C. .

PHYSICS OF PLASMAS, 2014, 21 (01)

[2] Characterization of Onset of Parametric Decay Instability of Lower Hybrid Waves [J].

Baek, S. G. ;

Bonoli, P. T. ;

Parker, R. R. ;

Shiraiwa, S. ;

Wallace, G. M. ;

Porkolab, M. ;

Takase, Y. ;

Brunner, D. ;

Faust, I. C. ;

Hubbard, A. E. ;

LaBombard, B. L. ;

Lau, C. .

RADIOFREQUENCY POWER IN PLASMAS, 2014, 1580 :121-128

[3] Measurements of ion cyclotron parametric decay of lower hybrid waves at the high-field side of Alcator C-Mod [J].

Baek, S. G. ;

Parker, R. R. ;

Shiraiwa, S. ;

Wallace, G. M. ;

Bonoli, P. T. ;

Brunner, D. ;

Faust, I. C. ;

Hubbard, A. E. ;

LaBombard, B. ;

Porkolab, M. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2013, 55 (05)

[4] Particle simulation of lower hybrid wave propagation in fusion plasmas [J].

Bao, J. ;

Lin, Z. ;

Kuley, A. ;

Lu, Z. X. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2014, 56 (09)

[5]

Bao J., 2016, ARXIV160206554

[6] Lower hybrid current drive experiments on Alcator C-Mod: Comparison with theory and simulation [J].

Bonoli, P. T. ;

Ko, J. ;

Parker, R. ;

Schmidt, A. E. ;

Wallace, G. ;

Wright, J. C. ;

Fiore, C. L. ;

Hubbard, A. E. ;

Irby, J. ;

Marmar, E. ;

Porkolab, M. ;

Terry, D. ;

Wolfe, S. M. ;

Wukitch, S. J. ;

Wilson, J. R. ;

Scott, S. ;

Valeo, E. ;

Phillips, C. K. ;

Harvey, R. W. .

PHYSICS OF PLASMAS, 2008, 15 (05)

[7]

Bonoli P. T., 2014, B AM PHYS SOC, V59, P15

[8] Review of recent experimental and modeling progress in the lower hybrid range of frequencies at ITER relevant parameters [J].

Bonoli, Paul T. .

PHYSICS OF PLASMAS, 2014, 21 (06)

[9] TOROIDAL AND SCATTERING EFFECTS ON LOWER-HYBRID WAVE-PROPAGATION [J].

BONOLI, PT ;

OTT, E .

PHYSICS OF FLUIDS, 1982, 25 (02) :359-375

[10] SIMULATION-MODEL FOR LOWER HYBRID CURRENT DRIVE [J].

BONOLI, PT ;

ENGLADE, RC .

PHYSICS OF FLUIDS, 1986, 29 (09) :2937-2950

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