Energy deposition and deflection of α particles in hot dense plasmas relevant to inertial confinement fusions

Nuclear Fushion

article

Chengliang Lin¹  Bin He¹  Yong Wu¹  Jianguo Wang¹ 

[1] National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics;Center for Applied Physics and Technology, HEDPS, Peking University

关键词: stopping power;    deflection of α particles;    deuterium–tritium plasmas;    inertial confinement fusion;    quantum kinetic theory;    energy deposition;   

DOI  :  10.1088/1741-4326/acd19f

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Based on the kinetic theory, improvedT -matrix models for the continuous-slowing-down and the linear-energy-transfer stopping powers are established at the same level, where multiple scattering effects and the related transverse deflection are accounted for consistently and systematically. The degree of deflection characterizing the extent of transverse deflection is defined by means of the ratio of these two stopping powers. Calculations for the energy deposition and deflection ofαparticles in hot dense deuterium–tritium (DT) plasmas and also in hot dense DT plasmas mixed with carbon (C) impurities are performed. Multiple scattering effects and the resulting transverse deflection are demonstrated to have a significant influence on the stopping power ofαparticles, in particular, in mixtures containing different ions with large mass and charge asymmetry. It is shown that for DT plasma mixed with 5%C impurities, the range and penetration depth of theαparticle are shortened by about 21%and 27% , respectively. Our models are found to be appropriate for the evaluation of stopping powers not only in weakly coupled plasmas but also in moderately degenerate and correlated plasmas. These results manifest that multiple scattering effects and the induced transverse deflection need to be taken into account in modeling the transport ofαparticles in hot dense plasmas relevant to inertial confinement fusion.

【 授权许可】

Unknown