Turbulent transport of beam ions

被引：31

作者：

Dannert, T. ^{[1
]}

Guenter, S. ^{[2
]}

Hauff, T. ^{[2
]}

Jenko, F. ^{[2
]}

Lapillonne, X. ^{[1
]}

Lauber, P. ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland

[2] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

来源：

PHYSICS OF PLASMAS | 2008年 / 15卷 / 06期

关键词：

D O I：

10.1063/1.2936886

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：

The radial redistribution of energetic ions by background turbulence is investigated by means of linear and nonlinear gyrokinetic simulations with the GENE code [T. Dannert and F. Jenko, Phys. Plasmas 12, 072309 (2005)]. The fast particles are described by an asymmetric and anisotropic Maxwellian distribution function, and they are treated as passive tracers. It is found that there can be a significant fast ion diffusivity for particle energies up to about 10 times the thermal energy, with details depending on the properties of the magnetic geometry and of the microinstabilities driving the turbulence. This finding provides a possible explanation of experimental results concerning the efficiency of neutral beam current drive reported recently from ASDEX Upgrade [S. Gunter , Nucl. Fusion 47, 920 (2007)]. (c) 2008 American Institute of Physics.

引用

页数：16

共 36 条

[1] Non-Gaussian transport in strong plasma turbulence [J].

Annibaldi, SV ;

Manfredi, G ;

Dendy, RO .

PHYSICS OF PLASMAS, 2002, 9 (03) :791-799

[2] Turbulent flux and the diffusion of passive tracers in electrostatic turbulence [J].

Basu, R ;

Jessen, T ;

Naulin, V ;

Rasmussen, JJ .

PHYSICS OF PLASMAS, 2003, 10 (07) :2696-2703

[3] FIELD-ALIGNED COORDINATES FOR NONLINEAR SIMULATIONS OF TOKAMAK TURBULENCE [J].

BEER, MA ;

COWLEY, SC ;

HAMMETT, GW .

PHYSICS OF PLASMAS, 1995, 2 (07) :2687-2700

[4] GYROKINETIC ENERGY-CONSERVATION AND POISSON-BRACKET FORMULATION [J].

BRIZARD, A .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1989, 1 (07) :1381-1384

[5] SHEAR, PERIODICITY, AND PLASMA BALLOONING MODES [J].

CONNOR, JW ;

HASTIE, RJ ;

TAYLOR, JB .

PHYSICAL REVIEW LETTERS, 1978, 40 (06) :396-399

[6] Gyrokinetic simulation of collisionless trapped-electron mode turbulence [J].

Dannert, T ;

Jenko, F .

PHYSICS OF PLASMAS, 2005, 12 (07) :1-8

[7]

DANNERT T, 2005, THESIS TECHNISCHE U

[8]

EFTHIMION PC, 1989, PLASMA PHYS CONTROLL, V1, P307

[9] Turbulent transport of alpha particles in reactor plasmas [J].

Estrada-Mila, C. ;

Candy, J. ;

Waltz, R. E. .

PHYSICS OF PLASMAS, 2006, 13 (11)

[10] Gyrokinetic simulations of ion and impurity transport [J].

Estrada-Mila, C ;

Candy, J ;

Waltz, RE .

PHYSICS OF PLASMAS, 2005, 12 (02) :022305-1

← 1 2 3 4 →