학술논문
Criterion for long sustained highly peaked ion temperature in diverted configuration of KSTAR tokamak.
Document Type
Article
Author
Source
Subject
*TOKAMAKS
*ION temperature
*NEUTRAL beams
*FAST ions
*PLASMA beam injection heating
*MAGNETIC fields
*LOW voltage systems
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Language
ISSN
1070-664X
Abstract
In the context of KSTAR plasma research, the discovery of the fast ion regulated enhanced mode is noteworthy due to its remarkable ability to maintain ion temperatures exceeding up to 10 keV for a few tens of seconds, avoid impurity accumulation, and keep low loop voltages. This new plasma operating scenario is achieved in a diverted configuration plasma by avoiding the H-mode transitions with sufficient additional power for the transition. Keeping the density low is the primary method for the avoidance. Additionally, adjustments to other parameters (plasma shape, neutral beam injection, and toroidal magnetic field) associated with the H-mode threshold power are applied to inhibit the transition process. This paper includes an experimental analysis and discussion of these findings. [ABSTRACT FROM AUTHOR]