Two-dimensional toroidal geometry neutral atom transport and material erosion rates in the TEXTOR and TFTR tokamaks

Abstract

The power deposition and wall material erosion rates due to charge-exchange neutral atoms resulting from a recycling source at limiters in the TEXTOR and TFTR tokamaks are reported. The analysis is carried out using a recently developed finite element, two-dimensional toroidal geometry diffusion theory neutral atom transport theory and the computer code, FENAT. The power deposition and material erosion are highest at the limiter. The first wall suffers very little erosion except for the portion near the limiter.