Fast Ion Transport in the Three-Dimensional Reversed-Field Pinch

被引：2

作者：

Bonofiglo, P. J. ^{[1
]}

Anderson, J. K. ^{[1
]}

Boguski, J. ^{[1
]}

Kim, J. ^{[1
]}

Egedal, J. ^{[1
]}

Gobbin, M. ^{[2
]}

Spong, D. A. ^{[3
]}

Parke, E. ^{[4
]}

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

[2] Associaz Euratom ENEA Fus, Consorzio RFX, I-35127 Padua, Italy

[3] Oak Ridge Natl Lab, POB 2009, Oak Ridge, TN 37831 USA

[4] TAE Technol Inc, Foothill Ranch, CA 92610 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 05期

关键词：

FLUCTUATIONS;

D O I：

10.1103/PhysRevLett.123.055001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first comprehensive experimental and numerical study of fast ion transport in the helical reversed-field pinch (RFP). Classical orbit effects dominate the macroscopic confinement properties. The strongest effect arises from growth in the dominant fast ion guiding-center island, but substantial influence from remnant subdominant tearing modes also plays a critical role. At the formation of the helical RFP, neutron flux measurements indicate a drastic loss of fast ions at sufficient subdominant mode amplitudes. Simulations corroborate these measurements and suggest that subdominant tearing modes strongly limit fast ion behavior. Previous work details a sharp thermal transport barrier and suggests the helical RFP as an Ohmically heated fusion reactor candidate; the enhanced transport of fast ions reported here identifies a key challenge for this scheme, but a workable scenario is conceivable with low subdominant tearing mode amplitudes.

引用

页数：5

共 26 条

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