MHD stability of negative triangularity DIII-D plasmas

Nuclear Fushion

article

W. Boyes¹  F. Turco¹  J. Hanson¹  A. Marinoni²  A. Turnbull³  M. Austin⁴  G. Navratil¹ 

[1] Department of Applied Physics and Applied Mathematics, Columbia University;Plasma Science and Fusion Center, Massachusetts Institute of Technology;General Atomics;The University of Texas at Austin

关键词: MHD;    scenarios;    negative triangularity;    tearing modes;   

DOI  :  10.1088/1741-4326/acd564

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptiven= 2 tearing modes, which experienceq _mingeqslant1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain3$" align="top">{beta _{ext{N}}} > 3 , high enough to reconsider long held views of NT stability. Ideal MHD and tearing stability analysis of well-diagnosed equilibrium reconstructions of experimental hybrid-like plasmas predict that among shape parameters, MHD stability limits are only sensitive to average triangularity. Operation is predicted to be possible at {beta _{ext{N}}}relevant to upcoming tokamaks and commercial NT reactors.

【 授权许可】

Unknown