A Monte-Carlo particle code for modeling of RF and NB heating in tokamaks*

The MCGO [1] MC code has been further developed, aimed at calculations of heating and losses of fast ions that are produced by RF and/or NBI.  The code will be available as an Open Source.  Ion orbits from a thermal, and an included NB source, are integrated in time under effects of collisions, charge exchange events and RF kicks.  A procedure for accumulation of particle loss distributions to the wall of test ions and neutrals is included as a function of poloidal and toroidal distance along the wall, particle energy and the incident angle.  As a verification study, a comparison is made between the results from the MC code and the finite-orbit-width bounce-average continuum Fokker-Planck code CQL3D-FOW [2], in case of minority ICRH in C-Mod.   The developed MC methods are being adapted to the multi-processor and GPU compute platforms supported by the US DOE.  [1] http://www.compxco.com/mcgo.html;  [2] Yu.V. Petrov and R.W. Harvey, PPCF 58, 115001 (2016).