Evaporation for heat pulses on Ni, Mo, W and ATJ graphite as first wall materials

Abstract

An analytical formula is presented for estimating the evaporation yield for heat pulses, i.e. a high energy deposition on a surface for a short time for different materials in a one-dimensional geometry. The amount of material evaporated from ATJ graphite is a factor 106 higher than from Mo and a factor 1011 higher than from W for the same heat pulse. Mo can stand about 15% higher and W about 65% higher heat pulses than ATJ graphite before melting or sublimation takes place. © 1980, All rights reserved.