Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive

被引：126

作者：

Hawkes, NC ^{[1
]}

Stratton, BC

Tala, T

Challis, CD

Conway, G

DeAngelis, R

Giroud, C

Hobirk, J

Joffrin, E

Lomas, P

Lotte, P

Mailloux, J

Mazon, D

Rachlew, E

Reyes-Cortes, S

Solano, E

Zastrow, KD

机构：

[1] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[3] Assoc Euratom Tekes, VTT Chem Technol, Espoo, Finland

[4] Max Planck Inst Plasmaphys, EURATOM Assoc, D-85740 Garching, Germany

[5] EURATOM Assoc, ENEA Fus, CRE Frascati, Rome, Italy

[6] CEA Cadarache, EURATOM Assoc, CEA, F-13108 St Paul Durance, France

[7] Royal Inst Technol, Dept Phys 1, Euratom NFR, SE-10044 Stockholm, Sweden

[8] Ctr Fusao Nucl, Euratom IST Assoc, P-1049001 Lisbon, Portugal

[9] CIEMAT, CIEMAT Fus, Assoc EURATOM, E-28040 Madrid, Spain

[10] EFDA CSU JET, Abingdon OX14 3EA, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.87.115001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Simultaneous current ramping and application of lower hybrid heating and current drive (LHCD) have produced a region with zero current density within measurement errors in the core (r/a less than or equal to 0.2) of JET tokamak optimized shear discharges. The reduction of core current density is consistent with a simple physical explanation and numerical simulations of radial current diffusion including the effects of LHCD. However, the core current density is clamped at zero, indicating the existence of a physical mechanism which prevents it from becoming negative.

引用

页码：art. no. / 115001

页数：4

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