用大角度伴随粒子法测量聚变中子产额及其校对实验

Measurement and Check of Fusion Neutron Yield with the Method of Associated Particles at a Large Angle

描述了用大角度（１７８．２°）伴随α粒子方法测量绝对Ｄ－Ｔ 聚变中子产额及其校对实验。为此，设计和加工了一套三叉管校对靶室。α粒子探测器分别置于与Ｄ＋ 束成９０°、１３５°和１７８．２°的方向上。测量和比较了三个方向的α粒子谱和绝对中子产额。分析了实验误差来源。并对实验结果进行了讨论。

In this paper, it is described that how the absolute D T fusion neutron yield was measured by using the method of associated alpha particles at a large angle (178.2°) direction. A checking target chamber with three directions was designed and manufactured. Associated alpha particle detectors were put at the directions of 90°,135°and 178.2°to D + beam current. Alpha particle spectra and absolute neutron yields at the three directions were measured and compared. The sources of experimental errors were analyzed in detail. The experimental results were discussed.