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

[21] The CHEASE code for toroidal MHD equilibria [J].

Lutjens, H ;

Bondeson, A ;

Sauter, O .

COMPUTER PHYSICS COMMUNICATIONS, 1996, 97 (03) :219-260

[22] Transport properties of energetic particles in a turbulent electrostatic field [J].

Manfredi, G ;

Dendy, RO .

PHYSICS OF PLASMAS, 1997, 4 (03) :628-635

[23] Test-particle transport in strong electrostatic drift turbulence with finite larmor radius effects [J].

Manfredi, G ;

Dendy, RO .

PHYSICAL REVIEW LETTERS, 1996, 76 (23) :4360-4363

[24] Nonlinear saturation of trapped electron modes via perpendicular particle diffusion [J].

Merz, F. ;

Jenko, F. .

PHYSICAL REVIEW LETTERS, 2008, 100 (03)

[25] Dispersion of ideal particles in a two-dimensional model of electrostatic turbulence [J].

Naulin, V ;

Nielsen, AH ;

Rasmussen, JJ .

PHYSICS OF PLASMAS, 1999, 6 (12) :4575-4585

[26] Dynamical alignment in three species tokamak edge turbulence [J].

Scott, BD .

PHYSICS OF PLASMAS, 2005, 12 (08) :1-11

[27] Turbulent transport of ions with large Larmor radii [J].

Vlad, M ;

Spineanu, F ;

Itoh, SI ;

Yagi, M ;

Itoh, K .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (07) :1015-1029

[28]

Vlad M, 2004, PHYS REV E, V70, DOI 10.1103/PhysRevE.70.056304

[29] Lagrangian versus Eulerian correlations and transport scaling [J].

Vlad, M ;

Spineanu, F ;

Misguich, JH ;

Reuss, JD ;

Balescu, R ;

Itoh, K ;

Itoh, SI .

PLASMA PHYSICS AND CONTROLLED FUSION, 2004, 46 (07) :1051-1063

[30] Larmor radius effects on impurity transport in turbulent plasmas [J].

Vlad, M ;

Spineanu, F .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (02) :281-294

← 1 2 3 4 →