Study Of The Magnetic Nano-particles/Polystyrene Used As ICF Target Materials

The bottleneck for inertial confinement fusion (ICF) to realize the commercialization is that the energy gain is very low, which means the ratio of the releasing nuclear energy to the drive implosion energy. And the energy gain of ICF is relating to the targets designing, fabrication and the efficiency of laser on the targets. In this study, the assumption for ICF targets levitating in the magnetic field so as to realize the ICF targets implosion without supporting is designed. Because the ICF target is levitating in the magnetic field, so as to reduce the target surface roughness, also the radiation of laser and X-rays can act on target materials uniformly and symmetrically from different direction, and realize the high energy gain. In order to realize such purpose, by the method of magnetic nanometer powder doped polystyrene, magnetic target materials was prepared, which laid the groundwork for the magnetic ICF target fabrication, also laid the groundwork for realizing the ICF targets implosion without supporting.In the present study, magnetic nanometer BaFe₁₂O₁₉ and Fe₃O₄ were prepared by the methods of sol-gel and double micro-emulsion. And by the reality polymerization technology, BaFe₁₂O₁₉ PS and Fe₃O₄/ PS composite materials were prepared. The theoretic model of the ICF target to realize the levitation without supporting in the magnetic field was established, also the needed magnetic field strength to realize the levitation of the ICF target in the magnetic field was calculated. By the means of XRD, FTIR TG-DSC SEM TEM AFM VSM et al, the prepared nanometer powder and the composite materials were analyzed, and obtained following results:(l)The average particle size of BaFe₁₂O₁₉ prepared by the method of sol-gel was about 50nm, and the coercive was about 2.2KOe, and the residual magnetization was about 4.2KGs. The average particle size of Fe₃O₄ prepared by the method of double micro-emulsion was about 20nm, and the saturation magnetization was about 62emu/g.(2)The saturation magnetizations of BaFe₁₂O₁₉/PS and Fe₃O₄ PS composite materials were increasing with the content of the magnetic powder.