BeH2材料的制备及在ICF中的应用
Preparation and application of beryllium hydride materials in inertial confinement fusion
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摘要: 简述了BeH2材料的制备方法、结构形式和物理化学性质，并分析了其在惯性约束聚变(ICF)中的应用。BeH2材料主要由二叔丁基铍热解法和元素化学气相沉积法制备，其纯度(质量分数)高达99%。非晶BeH2材料的结构是一种共用氢原子作为顶点的BeH4四面体网络结构。非晶BeH2材料不仅具有铍的优点，还具有聚合物的优点，作为ICF靶可以降低瑞利-泰勒不稳定性，而且掺入高Z元素后还可以降低D-T燃料的预热。非晶BeH2材料作为烧蚀层，掺入高Z元素后可以提高激光-X光的转换效率。Abstract: The preparation of beryllium hydride materials is described and the structure and the physical and chemical properties are analyzed in the paper. Its application in inertial confinement fusion is analyzed. The beryllium hydride materials are mainly produced by pyrolysis of di-tert-butyl beryllium and by CVD from elements. The structure of amorphous beryllium hydride is a network structure of corner-sharing BeH4 tetrahedron. Amorphous beryllium hydride can reduce the probability of Raighley-Taylor instability and diminish preheating of a DT-mixture by introduction of heavy-elements. Amorphous beryllium hydride, as ablator, can increase conversion from laser to X-rays.
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Key words:
- beryllium hydride /
- di-tert-butyl beryllium /
- cvd /
- icf
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