Open AccessBurning fraction, radial transport, and steady state profiles of multi-species particles in CFETR burning plasmas
Author(s) -
Weisheng Lin,
X. G. Wang,
Chijie Xiao,
Z.H. Wang,
Defeng Kong,
Yue Lang
Publication year - 2020
Publication title -
nuclear fusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.774
H-Index - 120
eISSN - 1741-4326
pISSN - 0029-5515
DOI - 10.1088/1741-4326/ab8c64
Subject(s) - plasma , fusion power , materials science , fusion , helium , particle (ecology) , diffusion , physics , analytical chemistry (journal) , atomic physics , thermodynamics , nuclear physics , chemistry , geology , chromatography , philosophy , linguistics , oceanography
The burning fraction of fuel particles is a crucial issue for future fusion reactors. In order to achieve the high tritium burning fraction required by China Fusion Engineering Test Reactor (CFETR) engineering design, fueling depths and quantities should be estimated by particle control analysis for different scenarios. Thus, in this paper, a multi-species fluid model of deuterium-tritium (D-T) fusion plasmas is applied to study radial transport and profile evolution with CFETR parameters under different fueling conditions. In the model, alpha particles are treated with a slowing down model and diffusion coefficients are introduced according to τ E _ 9 8 . Then, in such a self-consistent burning plasma simulation, the results show that the fusion reaction and fueling parameters effect remarkably changes the shape of D/T profiles, while to alphas and helium ash however, the effect of the fueling parameters is much weaker. It is also seen that the burning fraction is increased substantially with the fueling depth, and significantly affected by particle confinement. Furthermore, by substantially raising the D:T ratio to the regime of above unity, the burning fraction can be increased notably, but with a cost of a certain level of fusion power reduction.