Neutral beam stopping and shine-through calculations for fusion neutron source DEMO-FNS

Abstract

BTR code, which is generally used for NBI beamlines design and optimizations, is applied to calculate beam stopping and shine-through power in a fusion neutron source DEMO-FNS tokamak (R = 3.2m, a = 1m, k = 2, B = 5T, ED = 500keV, PNBI ≈ 30MW). Beam-plasma model applies the available cross-section fits and reproduces the detailed beam spatial and angular distributions (BTR standard beam) for different operation scenarios and calculates atomic power decay 3D-profiles, beam footprints and ions source distributions. The model is used to study the effect of injected beam geometry on the beam capture and shine-through power deposition.BTR code, which is generally used for NBI beamlines design and optimizations, is applied to calculate beam stopping and shine-through power in a fusion neutron source DEMO-FNS tokamak (R = 3.2m, a = 1m, k = 2, B = 5T, ED = 500keV, PNBI ≈ 30MW). Beam-plasma model applies the available cross-section fits and reproduces the detailed beam spatial and angular distributions (BTR standard beam) for different operation scenarios and calculates atomic power decay 3D-profiles, beam footprints and ions source distributions. The model is used to study the effect of injected beam geometry on the beam capture and shine-through power deposition.