A fitting formula for electron-ion energy partition fraction of 3.54-MeV fusion alpha particles in hot dense deuterium-tritium plasmas

doi:10.1088/1674-1056/abc53b

Abstract Based on our previous work (Phys. Plasmas 25 012704 (2018)), a fitting formula is given for electron-ion energy partition fraction of 3.54-MeV fusion alpha particles in deuterium-tritium (DT) plasmas as a function of plasma mass density ρ , electron temperature T_e, and ion temperature T_i. The formula can be used in a huge range of the plasma state, where ρ varies between 1.0 g/cc∼ 10.0³ g/cc and both T_e and T_i change from 0.1 keV to 100.0 keV. Relativistic effect for electrons is investigated including the effect of the projectile recoil in the plasmas at T_e≥ 50.0 keV. The partition fraction for T_e>T_i is found to be close to that for T_e=T_i. The comparisons with other fitting results are made at some plasma densities when T_e=T_i, and the difference is explained. The fitting result is very close to the calculated one in most cases, which is convenient for the simulation of alpha heating in hot dense DT plasmas for inertial confined fusion.

Keywords: inertial confinement fusion deuterium-tritium plasma alpha heating energy loss

Received: 01 September 2020
Revised: 19 October 2020
Accepted manuscript online: 28 October 2020

PACS:	52.40.Mj	(Particle beam interactions in plasmas)
	34.50.Bw	(Energy loss and stopping power)
	52.20.Hv	(Atomic, molecular, ion, and heavy-particle collisions)
	52.58.Hm	(Heavy-ion inertial confinement)

Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0402300 and 2017YFA0403200), the National Natural Science Foundation of China (Grant No. 11574034), the Innovation Development Foundation of China Academy of Engineering Physics (CAEP) (Grant No. CX20200029), and the Science Challenge Project (Grant Nos. JCKY201612A501).

Corresponding Authors: ^†Corresponding author. E-mail: hebin-rc@163.com

Cite this article:

Yan-Ning Zhang(张艳宁), Zhi-Gang Wang(王志刚), Yong-Tao Zhao(赵永涛), and Bin He(何斌) A fitting formula for electron-ion energy partition fraction of 3.54-MeV fusion alpha particles in hot dense deuterium-tritium plasmas 2021 Chin. Phys. B 30 015202

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A fitting formula for electron-ion energy partition fraction of 3.54-MeV fusion alpha particles in hot dense deuterium-tritium plasmas

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