Stellarator turbulence at electron gyroradius scales

Details Stellarator turbulence at electron gyroradius scales Stellarator turbulence at electron gyroradius scales

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002njph....4...35j&link_type=abstract

New Journal of Physics, Volume 4, Issue 1, pp. 35 (2002).

Physics

9

Scientific paper

Electromagnetic gyrokinetic simulations of electron-temperature-gradient-driven modes on electron gyroradius scales are performed in the geometry of an advanced stellarator fusion experiment, Wendelstein 7-AS. Based on linear simulations, a critical electron-temperature-gradient formula is established which happens to agree quite well with a previously derived formula for tokamaks in the appropriate limit. Nonlinear simulations are used to study the turbulence and transport characteristics which are dominated by the presence of high-amplitude radially elongated vortices or `streamers'. The role of Debye shielding effects is also examined.

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