Ion-temperature-gradient driven modes in pinch configurations within a linear 
gyrokinetic particle-in-cell simulation of ions and electrons

Sorge, S.; Hatzky, R.

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Ion-temperature-gradient driven modes in pinch configurations within a linear gyrokinetic particle-in-cell simulation of ions and electrons

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Sorge, S.
Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society;

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Hatzky, R.
Computer Center Garching (RZG), Max Planck Institute for Plasma Physics, Max Planck Society;

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Sorge, S., & Hatzky, R. (2002). Ion-temperature-gradient driven modes in pinch configurations within a linear gyrokinetic particle-in-cell simulation of ions and electrons. Plasma Physics and Controlled Fusion, 44(11), 2471-2481.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0027-42CA-5

Abstract

The influence of trapped electrons on ion-temperature-gradient driven plasma instabilities is investigated in the bumpy pinch configuration as a simplified model of the Wendelstein 7-X stellarator. For these investigations a gyrokinetic global linear particle-in-cell simulation of the plasma ions and electrons was done with the GYrokinetic Global Linear Equation Solver(GYGLES) code (Fivaz M et al 1998 Comp. Phys. Comm. 111 27, Hatzky R and Fivaz M 1998 Proc. EPS 25th Conf on Controlled Fusion and Plasma Physics (Prague, 1998) (Petit-Lancy: European Physical Society) p 1804). For this purpose, the code was modified by replacing the adiabatic response of the electrons with a gyrokinetic treatment. The growth rates of the modes considered were found to increase owing to the trapped electrons and the gradient of the electron temperature. However, the effect is small in relation to that of trapped electrons in typical tokamak configurations.