NIFS-306

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Author(s):

S. Murakami, M. Okamoto, N. Nakajima, K.Y. Watanabe, T. Watari, T. Mutoh, R. Kumazawa and T. Seki

Title:

Monte Carlo Simulation for ICRF Heating in Heliotron/Torsatrons

Date of publication:

Sep. 1994

Key words:

Monte Carlo simulation, ICRF minority heating, Large Helical Device, heating efficiency, finite beta effects, orbit loss, radial electric field

Abstract:

A Monte Carlo simulation code has been developed for studying ICRF minority heating in heliotron/torsatrons, which includes complicated orbits of high energetic particles, Coulomb collisions, interactions between the particles and the applied RF-field, and the self-determined radial electric field in the finite beta equilibrium. Calculations have been carried out using the code to study physics of ICRF minority heating in heliotron/torsatrons taking the Large Helical Device as an example. The radial electric field is self-consistently determined taking into account orbit loss of accelerated minority ions. Common characteristics of physics of ICRF minority heating in heliotron/torsatrons, such as effects of finite beta, location of resonance layer, finite parallel component of k, localization of the RF-field, minority species, and the radial electric field, are clarified.

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