Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models

被引：40

作者：

Rodriguez-Fernandez, P. ^{[1
]}

White, A. E. ^{[1
]}

Howard, N. T. ^{[1
]}

Grierson, B. A. ^{[2
]}

Staebler, G. M. ^{[3
]}

Rice, J. E. ^{[1
]}

Yuan, X. ^{[2
]}

Cao, N. M. ^{[1
]}

Creely, A. J. ^{[1
]}

Greenwald, M. J. ^{[1
]}

Hubbard, A. E. ^{[1
]}

Hughes, J. W. ^{[1
]}

Irby, J. H. ^{[1
]}

Sciortino, F. ^{[1
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA

[3] Gen Atom, POB 85608, San Diego, CA 92186 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 07期

关键词：

ELECTRON HEAT-TRANSPORT; BEHAVIOR;

D O I：

10.1103/PhysRevLett.120.075001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A long-standing enigma in plasma transport has been resolved by modeling of cold-pulse experiments conducted on the Alcator C-Mod tokamak. Controlled edge cooling of fusion plasmas triggers core electron heating on time scales faster than an energy confinement time, which has long been interpreted as strong evidence of nonlocal transport. This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-pulse experiments in tokamak plasmas.

引用

页数：6

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