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arXiv 2512.09482physics.ins-dethep-ex
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为地下核实验室(LNGS)研制便携式中子谱仪

Commissioning of a mobile neutron spectrometer for LNGS

University of L’Aquila(拉奎拉大学);INFN, Laboratori Nazionali del Gran Sasso(意大利国家核物理研究所,格兰萨索国家实验室);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);Heidelberg University(海德堡大学)

Francesco Pompa, Klaus Eitel, Alfredo Davide Ferella, Felix Kratzmeier, Melih Solmaz, Kathrin Valerius

AI总结:

为地下核实验室研制便携式中子谱仪,通过捕获门控光谱学技术,实现对中子背景的精确测量和分析。

摘要:

环境中的中子是地下实验室中稀有事件搜索的背景源。由于大部分中子背景来自 cavern 墙,这是由于混凝土和岩石的固有放射性,中子通量是时间和位置依赖的。因此,需要精确了解谱和总通量,以设计屏蔽和 veto 机制。这里介绍了 ALMOND(An LNGS Mobile Neutron Detector)。它是一种便携式中子谱仪,基于捕获门控光谱学,由塑料闪烁体条阵列包裹着 Gadolinium 薄膜组成。该探测器已使用 Americium-Beryllium 源在卡尔斯鲁厄理工学院和 Americium-Boron 源和 D-D 生成器在 ENEA Frascati 进行校准。这里展示了中子校准结果,包括时间飞行法和 D-D 生成器的结果,以及捕获时间剖面的初步结果。此外,还展示了在 LNGS Hall A 进行的中子背景运行的初步结果。

英文摘要:

Environmental neutrons are a source of background for rare event searches in underground laboratories. Since the majority of the neutron background comes from the cavern walls due to the intrinsic radioactivity of concrete and rock, the flux is known to be time and location dependent. Therefore, a precise knowledge of the spectrum and of the total flux is needed to devise shielding and veto mechanisms for rare event searches. Here ALMOND (An LNGS Mobile Neutron Detector) is presented. It is a mobile neutron spectrometer, based on capture-gated spectroscopy and comprised of an array of plastic scintillator bars wrapped with gadolinium foils. The detector has been calibrated with Americium-Beryllium source at Karlsruhe Institute of Technology and with an Americium-Boron source and a D-D generator at ENEA Frascati. The results of the neutron calibration with the time of flight method and the D-D generator are shown here, alongside the first results on capture time profile. Moreover, the first results from the neutron background run in Hall A at LNGS are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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