升级后的CERN-n_TOF装置中子捕获测量的新视角

J. Lerendegui-Marco, A. Casanovas, V. Alcayne, The nTOF Collaboration
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引用次数: 5

摘要

n_TOF设施刚刚在2021年进行了一次重大升级,安装了第三代散裂目标,旨在优化两条n_TOF飞行时间线的性能。这篇文章描述了在目标升级之前的两条波束线捕获测量的关键特征和限制,并介绍了作为升级设施调试的一部分进行的(n,γ)测量的初步结果。特别是,在保持长波束线n_TOF-EAR1的高分辨率的同时,20 m长的垂直波束线的能量分辨率得到了明显的提高,而能量分辨率是提高信本比和获得准确共振参数的关键因素。n_TOF中子束线的改进需要与仪器的改进相伴随。综述了最近的探测器研发项目,旨在解决现有的挑战,进一步提高该设施的能力。
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New perspectives for neutron capture measurements in the upgraded CERN-n_TOF Facility
The n_TOF facility has just undergone in 2021 a major upgrade with the installation of its third generation spallation target that has been designed to optimize the performance of the two n_TOF time-of-flight lines. This contribution describes the key features and limitations for capture measurements in the two beam lines prior to the target upgrade and presents first results of (n,γ) measurements carried out as part of the commissioning of the upgraded facility. In particular, the energy resolution, a key factor for both increasing the signal-to-background ratio and obtaining accurate resonance parameters, has been clearly improved for the 20 m long vertical beam-line with the new target design while keeping the remarkably high resolution of the long beamline n_TOF-EAR1. The improvements in the n_TOF neutron beam-lines need to be accompanied by improvements in the instrumentation. A review is given on recent detector R&D projects aimed at tackling the existing challenges and further improving the capabilities of this facility.
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