Formation of the non-axisymmetric helical current driven by a biased electrode in the scrape-off layer on J-TEXT

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Indexed by:Journal paper

First Author:Nengchao Wang

Correspondence Author:Y. Liang

Journal:Nuclear Fusion

Included Journals:SCI

Volume:59

Issue:9

Page Number:096047

DOI number:10.1088/1741-4326/ab2d03

Date of Publication:2019-08-06

Abstract:Resonant magnetic perturbations (RMPs), which change the magnetic topology, have been applied to control the edge-localized modes (ELMs) in many tokamak experiments. The nonaxisymmetric helical currents induced by lower hybrid waves in the scrape-off layer (SOL) were observed to impact the magnetic topology profoundly and mitigated ELMs strongly in EAST (Liang et al 2013 Phys. Rev. Lett. 110 235002). In this paper, we present electrode biasing in the SOL as an alternative method to drive the non-axisymmetric helical currents in J-TEXT. A significant SOL current (e.g. ~150 A) was induced throug

Links to published journals:https://doi.org/10.1088/1741-4326/ab2d03