Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive
2001 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 8711, no 11, art. no.-115001 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2001. Vol. 8711, no 11, art. no.-115001 p.
reversed magnetic shear, confinement, transport, tokamaks
IdentifiersURN: urn:nbn:se:kth:diva-20939ISI: 000170984600022OAI: oai:DiVA.org:kth-20939DiVA: diva2:339636
QC 201005252010-08-102010-08-10Bibliographically approved