Fabrication of solid CH-CD multilayer microspheres for inertial confinement fusion

作     者：Meifang Liu Xing Ai Yiyang Liu Qiang Chen Shuai Zhang Zhibing He Yawen Huang Qiang Yin 

作者机构：Research Center of Laser FusionChina Academy of Engineering PhysicsMianyangChina State Key Laboratory of Envronment-Friendly Energy MaterialsSouthwest University of Science and TechnologyMianyangChina 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2021年第6卷第2期

页      面：28-36页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070305[理学-高分子化学与物理] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：funding from the National Natural Science Foundation of China(Grant Nos.51703212 and 52073264) the Open Project of the State Key Laboratory of Environment-Friendly Energy Materials(Grant Nos.18kfhg03 and 19kfhg02) a project supported by the CAEP Foundation(Grant No.PY20200117). 

主　　题：method. multilayer beads 

摘      要：Deuterated polymer microspheres can be used as a neutron source in conjunction with lasers because thermonuclear fusion neutrons can be produced efficiently by collisions of the resulting energetic deuterium ions.A new type of solid deuterated polymer microsphere with a carbon hydrogen–carbon deuterium(CH-CD)multilayer has been designed for preparing the target for inertial confinement fusion(ICF)experiments.To fabricate these solid CH-CD multilayer microspheres,CH beads are first fabricated by a microfluidic technique,and the CD coating layer is prepared by a plasma polymerization method.Both polystyrene(PS)and poly(α-methylstyrene)(PAMS)are used as the material sources for the CH beads.The effects of the PS and PAMS materials on the quality of the solid CH beads and the resulting CH-CD multilayer polymer microspheres are investigated.The solid PS beads have better sphericity and a smoother surface,but large vacuoles are observed in solid PS-CD multilayer microspheres owing to the presence of residual fluorobenzene in the beads and a glass transition temperature of the solid PS beads that is lower than the temperature of plasma polymerization.Therefore,solidPAMSbeads are more suitable as a mandrel for fabricating solid CH-CD multilayer polymer microspheres.Solid CH-CD multilayer microspheres with specified size have been successfully prepared by controlling the droplet size and the CD deposition rate and deposition time.Compared with the design value,the diameter deviation of the inner CH beads and the thickness deviation of the CD layer can be controlled within 20μmand 2μm,respectively.Thus,an approach has been developed to fabricate solid CH-CD multilayer microspheres that meet the physical design requirements for ICF.