Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP
Authors: Mario Podesta, M. Gorelenkova and R.B. White
Abstract: Fast ion transport models presently implemented in the tokamak transport code TRANSP [R. J. Hawryluk,
in Physics of Plasmas Close to Thermonuclear Conditions, CEC Brussels, 1 , 19 (1980)] are not capturing
important aspects of the physics associated with resonant transport caused by instabilities such as Toroidal
Alfven Eigenmodes (TAEs). This work describes the implementation of a fast ion transport model consistent
with the basic mechanisms of resonant mode-particle interaction. The model is formulated in terms
of a probability distribution function for the particle's steps in phase space, which is consistent with the
MonteCarlo approach used in TRANSP. The proposed model is based on the analysis of fast ion response
to TAE modes through the ORBIT code [R. B. White et al., Phys. Fluids 27 , 2455 (1984)], but it can be
generalized to higher frequency modes (e.g. Compressional and Global Alfven Eigenmodes) and to other
numerical codes or theories.
__________________________________________________
Submitted to: Plasma Physics and Controlled Fusion (February 2014)
__________________________________________________
Download PPPL-5002 (pdf 4.16 MB pp)
__________________________________________________