论文标题
Li-Glass/Multi-Anode光电塑料检测器对准直的热中子束的响应
Response of a Li-glass/multi-anode photomultiplier detector to collimated thermal-neutron beams
论文作者
论文摘要
已经使用准直中子的准束进行了对位置分辨率的热 - 独立检测开发用于热中子检测的位置敏感的Li-Glass闪烁体检测器的响应。检测器以0.5至1.0 mm的水平和垂直步骤垂直通过中子梁移动。在8 x 8像素多动物光电倍增管以逐个事件的基础上检测到闪烁。通常，几个像素在每个中子束位置注册了大信号。研究了高于设定阈值的像素的数量，而单击效率在检测器的最大可能面积上最大化，作为主要目标。在全部沉积峰的平均值的约50％的阈值下，大约80％的事件在单个像素中注册，导致X和Y中的有效位置分辨率约为5 mm。较低的阈值通常会导致表现出较高像素多数的事件，但这些事件也可以通过〜5 mm的位置分辨率进行定位。
The response of a position-sensitive Li-glass scintillator detector being developed for thermal-neutron detection with 6 mm position resolution has been investigated using collimated beams of thermal neutrons. The detector was moved perpendicularly through the neutron beams in 0.5 to 1.0 mm horizontal and vertical steps. Scintillation was detected in an 8 X 8 pixel multi-anode photomultiplier tube on an event-by-event basis. In general, several pixels registered large signals at each neutron-beam location. The number of pixels registering signal above a set threshold was investigated, with the maximization of the single-hit efficiency over the largest possible area of the detector as the primary goal. At a threshold of ~50% of the mean of the full-deposition peak, ~80% of the events were registered in a single pixel, resulting in an effective position resolution of ~5 mm in X and Y. Lower thresholds generally resulted in events demonstrating higher pixel multiplicities, but these events could also be localized with ~5 mm position resolution.
