Characterisation of a Multi-layer Boron-coated GEM detector for transmission measurements

Future spallation sources require new detectors to performe experiments at very high count rate. A new GEM detector optimised to detect thermal and epithermal neutron has been developed at Milano-Bicocca University and ITSP-CNR laboratories. The detector has been equipped with a series of GEM foils coverd on both side with a B4C layer (BGEM) and with 6 BGEM foils a detection efficiency of 20% may be reached. A series of relevant standard samples will be investigated in order to verify the detector features in realistic conditions. We expect the use of this detecotr in transmission geometry may improve the quality of cross section data in thermal and epithermal neutron range.

未来的散裂中子源需要新型探测器，以开展极高计数率条件下的实验研究。米兰比可卡大学（Milano-Bicocca University）与ITSP-CNR实验室已研发出一款针对热中子与超热中子探测优化的气体电子倍增器（Gas Electron Multiplier，GEM）探测器。该探测器搭载了一系列双面均涂覆有碳化硼（B₄C）层的GEM箔片（BGEM）；当配置6片BGEM箔片时，可实现20%的探测效率。研究团队将对一系列相关标准样品开展测试研究，以在真实实验条件下验证该探测器的性能特性。我们预计，在透射几何构型下使用该探测器，可提升热中子与超热中子能区的截面数据质量。