Beta limits in H-mode-like discharges
type: Item
instance of: scholarly article
title: Beta limits in H-mode-like discharges
zbMATH Open document ID: 0613.76057
DOI: 10.1016/0021-9991(86)90072-0
author: A. D. Turnbull
author: M. A. Secrétan
author: F. Troyon
author: S. Semenzato
author: Ralf Gruber
published in: Journal of Computational Physics
publication date: 1986-01-01T00:00:00Z
review text: Recent tokamak beta optimization studies have indicated the existence of a \(\beta\) limit proportional to the plasma current. A two-step numerical optimization procedure is described for finding \(\beta\) limits in tokamak configurations with peaked current and flat pressure profiles, such as are believed to be characteristic of H-mode plasmas immediately after the L to H transition. Current and pressure-driven instabilities are optimized independently by specifying both the averaged current density and the pressure gradient directly. Direct control over both the global and local characteristics of the pressure profile also permits independent optimization of ballooning modes and the low n kink modes that arise at high \(\beta\). Results are given for the optimization of a circular cross-section tokamak, computed for one value of the plasma current. An optimized, stable equilibrium is found.
Mathematics Subject Classification ID: 76E25
Mathematics Subject Classification ID: 76X05
Mathematics Subject Classification ID: 76M99
zbMATH DE Number: 3993156
zbMATH Keywords: ideal MHD stability limit
zbMATH Keywords: tokamak beta optimization
zbMATH Keywords: two-step numerical optimization procedure
zbMATH Keywords: tokamak configurations
zbMATH Keywords: peaked current
zbMATH Keywords: flat pressure profiles
zbMATH Keywords: H-mode plasmas
zbMATH Keywords: ballooning modes
zbMATH Keywords: kink modes
zbMATH Keywords: circular cross-section tokamak
describes a project that uses: ERATO
MaRDI profile type: Publication
full work available at URL: 0021-9991(86)90072-0
OpenAlex ID: W2000708712
cites work: New approach to magnetohydrodynamic stability: I. A practical stability concept
description: scientific article; zbMATH DE number 3993156