American Nuclear Society
Home

Home / Publications / Journals / Fusion Science and Technology / Volume 52 / Number 2 / Pages 154-160

A Quasi-Optical Beam-Tracing Code for Electron Cyclotron Absorption and Current Drive: GRAY

Daniela Farina

Fusion Science and Technology / Volume 52 / Number 2 / August 2007 / Pages 154-160

Technical Paper / Electron Cyclotron Wave Physics, Technology, and Applications - Part 1

The theoretical framework of quasi-optical propagation power absorption and driven current of a Gaussian beam of electron cyclotron (EC) waves in a general tokamak equilibrium implemented in the code GRAY is presented. Within the framework of the complex eikonal approach, the propagation of a general astigmatic Gaussian beam is described in terms of a set of coupled rays, allowing for diffraction effects. The computation of the EC wave absorption and current drive is performed for each ray of the beam, by means of a relativistic dispersion relation for EC waves and of a neoclassical response function for the current. The code has been designed and tested for calculations of propagation, power absorption, and current drive of realistic EC beams in ITER.

 
Questions or comments about the site? Contact the ANS Webmaster.
advertisement