^(238)U束流发射度的测量

Beam emittance measurements of ^(238)U

为实现236U的高灵敏测量,对意大利那不勒斯第二大学的同位素研究环境与文化遗产中心的加速器质谱装置进行了升级改造。采用单缝单丝法测量了238U的束流发射度,并与13C和H的束流发射度进行了比较。测量结果表明,238U在X方向和Y方向的边界发射度分别为(9.5±1.0)、(2.7±0.3)mm.m rad。根据测量的发射度数值,确定了拟安装的飞行时间探测器在束流线上的位置。

In order to accomplish the high sensitivity measurement of 236U,Center for Isotopic Research on Cultural and Environmental Heritage（CIRCE） AMS facility at Second University of Naples in Caserta,Italy was upgraded.The beam emittance of 238U was implemented by slit-wire method.The beam emittances of 13C and H were measured by using the same slit-wire system.The results indicated that the boundary emittances of 238U along X and Y axis are（9.5±1.0）and（2.7±0.3）mm·mrad,respectively.According to the results,the position of the detector of flight time on the beam line was located.