论文标题
密封的基于陶瓷的基于宝石的中子检测器
A sealed ceramic GEM-based neutron detector
论文作者
论文摘要
在过去的十年中，基于宝石的中子探测器蓬勃发展。然而，几乎所有基于宝石的中子探测器都在流量机模式下起作用，并且由于大气压和环境温度的动态变化，检测器的长期性能可能不稳定。在本文中，在中国散布中子源（CSN）开发了一个密封的基于宝石的中子探测器，其敏感面积为100 mm * 100 mm。提出和讨论了检测器的特征，其中包括高原曲线，中子束轮廓，中子波长光谱，空间分辨率（FWHM：2.77毫米），二维（2D）成像能力，中子检测效率和计数速率不稳定性（相对标准偏差（相对标准偏差（RSD）：0.7％）。结果表明，检测器在密封模式下具有良好的性能，可用于测量CSN处的直接中子束。
The GEM-based neutron detector has flourished in the past decade. However almost all the GEM-based neutron detectors work in the flow-gas mode, and the long-term performances of the detectors may be unstable due to the dynamic changes of atmospheric pressure and ambient temperature. In this paper, a sealed ceramic GEM-based neutron detector was developed at China Spallation Neutron Source (CSNS) and its sensitive area was 100 mm * 100 mm. The characterizations of the detector were presented and discussed, which included the plateau curve, the neutron beam profile, the neutron wavelength spectrum, the spatial resolution (FWHM: 2.77 mm), the two-dimensional (2D) imaging ability, the neutron detection efficiency and the counting rate instability (Relative Standard Deviation (RSD): 0.7%). The results show that the detector has good performances in sealed mode, and it can be used for the measurement of the direct neutron beam at CSNS.
