Density peaking, anomalous pinch, and collisionality in tokamak plasmas

被引：145

作者：

Angioni, C ^{[1
]}

Peeters, AG ^{[1
]}

Pereverzev, GV ^{[1
]}

Ryter, F ^{[1
]}

Tardini, G ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, IPP, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.90.205003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The existence of an anomalous particle pinch in magnetized tokamak plasmas is still questioned. Contradictory observations have been collected so far in tokamaks. Clear experimental evidence that density peaking in tokamak plasmas drops with increasing collisionality is provided for the first time. This phenomenon is explained by means of existing theoretical models based on the fluid description of drift wave instabilities, provided that such models include the dissipative effects introduced by collisions on the mentioned instabilities. These results reconcile the apparent contradictions found so far in the experiments.

引用

页码：4 / 205003

页数：4

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