D+离子束和自成型钛靶的作用特性研究

利用ZF-300 keV中子发生器，采用伴随粒子法研究D+离子束和自成型钛靶的中子产额随束流轰击时间的变化特性；利用X射线衍射分析和扫描电镜分别研究束流对靶物相结构和表面形貌的影响。结果表明，随D+离子束的轰击和注入，中子产额随轰击时间的变化逐渐变大，中子产额达到最大值后又随轰击时间的变化逐渐变小；束流轰击前后靶表面无熔坑出现，随D+离子束流的增大，靶表面的条纹状痕迹逐渐消失；D+离子束的轰击未改变自成型钛靶的物相结构。基于离子与固体相互作用的数值模拟，分析讨论了D+离子束和自成型钛靶的作用机制。

Study on Interaction of the Deuterium Ion Beam and the Drive-in Titanium Target

Interaction of the deuterium ion beam and the drive-in titanium target was studied by measuring the neutron yield as a function of bombarding time with the associated particles method in ZF-300 neutron generation. X-ray diffraction for phase analyses and scanning electron microscopy for the surface morphology were used to characterize the targets. During the bombarding period with deuterium ion beam, the neutron yield increases gradually with deuterium ion beam implantment at first, and then it decreases slowly. There is no obvious melting crater on the surface of the titanium targets bombarded with deuterium ion beam. With the increase of deuterium ion beam intensity, the transverse polishing marks of the titanium targets disappear gradually. The phase of the drive-in titanium target is not changed in the experiment conditions. The prominent physical mechanism of the deuterium ion beam and the drive-in titanium target interaction was discussed based on the numerical simulation of the beam and the solid interaction.