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Ion temperature gradient modes and the fraction of trapped electrons

Published online by Cambridge University Press:  10 May 2005

P. MALINOV  and
F. ZONCA
P. MALINOV
Affiliation:
Associazione EURATOM-ENEA sulla Fusione, C. P. 65-00044 Frascati, Rome, Italy ([email protected]) Permanent address: Sofia University, Faculty of Physics, BG-1164 Sofia, Bulgaria.
F. ZONCA
Affiliation:
Associazione EURATOM-ENEA sulla Fusione, C. P. 65-00044 Frascati, Rome, Italy ([email protected])
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Abstract

The influence of the trapped electrons fraction on the growth-rate of the ion temperature gradient (ITG) modes is studied numerically for JET relevant conditions. As a possible mechanism for increasing the ITG mode growth rate with an increase in the fraction of trapped electrons, a shift in the real frequency is assumed that leads to less Landau damping. Another possible mechanism is the destabilizing contribution of dissipation effects.

Type
Papers
Information
Journal of Plasma Physics , Volume 71 , Issue 3 , June 2005 , pp. 301 - 313
Copyright
2005 Cambridge University Press

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