Intermittent transport in edge plasma with a 3-D magnetic geometry in the Large Helical Device

被引：3

作者：

Tanaka, H. ^{[1
]}

Masuzaki, S. ^{[1
]}

Ohno, N. ^{[2
]}

Morisaki, T. ^{[1
]}

Tsuji, Y. ^{[2
]}

机构：

[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[2] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷

关键词：

SCRAPE-OFF-LAYER; DIII-D TOKAMAK; ALCATOR C-MOD; T-10; TOKAMAK; FLUCTUATION; TURBULENCE; BOUNDARY;

D O I：

10.1016/j.jnucmat.2013.01.117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Blobby plasma transport is a universally observed phenomenon in magnetic confinement devices, and it is considered to be closely related to edge plasma physics. We have investigated such an intermittent event observed inside the divertor region of the Large Helical Device by using a fast-scanning Langmuir probe with two electrodes. Ion saturation current fluctuations showed negative spikes in the divertor leg and positive spikes in the private region. Further, the time delay between the two fluctuations followed a unique trajectory in the positive-skewness region. We found common as well as different fluctuation characteristics between the LHD and tokamaks. We discuss the analysis results in relation to the blob-generation and propagation behaviors in the three-dimensional magnetic geometry around the divertor leg. In addition, we quantitatively estimated the blob propagation velocity and size based on a theoretical assumption. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：S563 / S566

页数：4

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