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Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive
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2001 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 8711, no 11, art. no.-115001 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
reversed magnetic shear, confinement, transport, tokamaks
Identifiers
URN: urn:nbn:se:kth:diva-20939ISI: 000170984600022OAI: oai:DiVA.org:kth-20939DiVA: diva2:339636
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Rachlew, Elisabeth

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