Gyrokinetic simulation of driftwave instability in field-reversed configuration

被引：13

作者：

Fulton, D. P. ^{[1
,2
]}

Lau, C. K. ^{[2
]}

Schmitz, L. ^{[1
]}

Holod, I. ^{[2
]}

Lin, Z. ^{[2
]}

Tajima, T. ^{[1
]}

Binderbauer, M. W. ^{[1
]}

机构：

[1] Tri Alpha Energy Inc, Rancho Santa Margarita, CA 92688 USA

[2] Univ Calif Irvine, Irvine, CA 92697 USA

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 05期

关键词：

TURBULENT TRANSPORT; PARTICLE SIMULATION; PLASMA; CONFINEMENT;

D O I：

10.1063/1.4948285

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：

Following the recent remarkable progress in magnetohydrodynamic (MHD) stability control in the C-2U advanced beam driven field-reversed configuration (FRC), turbulent transport has become one of the foremost obstacles on the path towards an FRC-based fusion reactor. Significant effort has been made to expand kinetic simulation capabilities in FRC magnetic geometry. The recently upgraded Gyrokinetic Toroidal Code (GTC) now accommodates realistic magnetic geometry from the C-2U experiment at Tri Alpha Energy, Inc. and is optimized to efficiently handle the FRC's magnetic field line orientation. Initial electrostatic GTC simulations find that ion-scale instabilities are linearly stable in the FRC core for realistic pressure gradient drives. Estimated instability thresholds from linear GTC simulations are qualitatively consistent with critical gradients determined from experimental Doppler backscattering fluctuation data, which also find ion scale modes to be depressed in the FRC core. Beyond GTC, A New Code (ANC) has been developed to accurately resolve the magnetic field separatrix and address the interaction between the core and scrape-off layer regions, which ultimately determines global plasma confinement in the FRC. The current status of ANC and future development targets are discussed. Published by AIP Publishing.

引用

页数：7

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