Roles of Electric Field Shear and Shafranov Shift in Sustaining High Confinement in Enhanced Reversed Shear Plasmas on the TFTR Tokamak

E. J. Synakowski, S. H. Batha, M. A. Beer, M. G. Bell, R. E. Bell, R. V. Budny, C. E. Bush, P. C. Efthimion, G. W. Hammett, T. S. Hahm, B. LeBlanc, B. Levinton, E. Mazzucato, H. Park, A. T. Ramsey, G. Rewoldt, S. D. Scott, G. Schmidt, W. M. Tang, G. TaylorM. C. Zarnstorff

Research output: Contribution to journalArticlepeer-review

Abstract

The relaxation of core transport barriers in TFTR enhanced reversed shear plasmas has been studied by varying the radial electric field using different applied torques from neutral beam injection. Transport rates and fluctuations remain low over a wide range of radial electric field shear, but increase when the local E×B shearing rates are driven below a threshold comparable to the fastest linear growth rates of the dominant instabilities. Shafranov-shift-induced stabilization alone is not able to sustain enhanced confinement.

Original languageEnglish (US)
Pages (from-to)2972-2975
Number of pages4
JournalPhysical Review Letters
Volume78
Issue number15
DOIs
StatePublished - Apr 14 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Roles of Electric Field Shear and Shafranov Shift in Sustaining High Confinement in Enhanced Reversed Shear Plasmas on the TFTR Tokamak'. Together they form a unique fingerprint.

Cite this