改进三维CE/SE算法在气相爆轰中的应用

本文推导了一种改进三维CE/SE格式,用二步模型对氢氧(2H2+O2)气相爆轰进行了数值模拟,得到了氢氧爆轰的三维数值胞格结构。数值结果表明:1.本文的CE/SE格式能很好的适用于有化学反应存在的流动;2.氢氧爆轰具有复杂的三维结构。

Studies of a scintillator-bar detector for neutron wall at externaltarget facility

To achieve a better time resolution of a scintillator-bar detector for a neutron wall at the external target facility of HIRFL-CSR,we have carried out a detailed study of the photomultiplier,the wrapping material and the coupling media. The timing properties of a scintillator-bar detector have been studied in detail with cosmic rays using a high and low level signal coincidence. A time resolution of 80 ps has been achieved in the center of the scintillator-bar detector.