Model for the transition to the radiatively improved mode in a tokamak

被引：96

作者：

Tokar, MZ

Ongena, J

Unterberg, B

Weynants, RR

机构：

[1] Forschungszentrum Julich, EURATOM Assoc, Inst Plasmaphys, D-52425 Julich, Germany

[2] Ecole Royale Mil Koninklijke Mil Sch, EURATOM Assoc, Lab Plasmafys, Lab Phys Plasmas, B-1000 Brussels, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.84.895

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A model for the transition to the radiatively improved (RI) mode triggered in tokamaks by seeding of impurities is proposed. This model takes into account that with increasing plasma effective charge the growth rate of the toroidal ion temperature gradient (ITG) instability, considered nowadays as the dominant source of anomalous energy losses in low-confinement (L) mode, decreases, Asa result the plasma density profile peaks due to an inward convection generated by trapped electron turbulence. This completely quenches ITG induced transport and a bifurcation to the RI mode occurs. Conditions necessary for the L-RI transition are investigated.

引用

页码：895 / 898

页数：4

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