Nuclear data measurements at n_TOF for fusion and fission applications

新的核技术需要改进核数据，该项目旨在通过对裂变和聚变系统都很重要的关键材料的中子诱导反应来测量这些数据集。该项目的重点是在中子飞行时间设施n_TOF进行测量，在CERN，来自CERN加速器复合体的高能（20 GeV/c）质子撞击铅溅射靶，导致强中子源。中子穿过真空飞行路径所需的时间用于计算中子能量，并且可以测量中子诱导反应和相关量（例如反应截面）的测量。由于其宽中子能量范围和高中子通量，该设施可以进行独特的测量。可以在n_TOF处进行的核数据测量是中子诱发裂变、俘获和发射带电粒子的核数据测量。该学生最初将开发一种新的实验技术来测量非弹性散射截面测量，然后再进行对核聚变技术重要的中子诱导带电粒子反应测量。在n_TOF上使用LaBr 3探测器进行中子在Fe-56上非弹性散射的初步测试，其结果将有助于形成和指导未来在n_TOF上进行此类实验的实验计划。其次，学生将致力于开发使用环形硅探测器检测中子诱导带电粒子反应的实验装置。该项目将设计并实施一项在n_TOF上进行的实验，以测量与聚变技术有关的材料，如钨。此外，该项目将支持和加强英国对n_TOF设施的参与和贡献，该设施每年进行许多对核技术具有重要意义的测量。

New nuclear technologies require improved nuclear data and this project aims to measure these data sets through neutron induced reactions on key materials of importance to both fission and fusion systems.The focus of this project is to conduct measurements at the neutron time-of-flight facility n_TOF, CERN where high-energy (20 GeV/c) protons from the CERN accelerator complex impinge on a lead spallation target which leads to an intense neutron source. The time it takes a neutron to travel through an evacuated flight path is used to calculate the neutron energy and the measurement of neutron induced reactions and related quantities such as the reaction cross section can be measured. The facility allows unique measurements thanks to its wide neutron-energy range and high neutron flux. Nuclear data measurements that can be done at n_TOF are neutron-induced fission, capture, and ones emitting charged particles. The student will initially be developing a new experimental technique to measure inelastic scattering cross section measurements before moving onto performing neutron induced charged particle reaction measurements of importance to nuclear fusion technologies. An initial test to measure neutron inelastic scattering on Fe-56 will be performed at n_TOF using LaBr3 detectors, the results of which will help shape and guide a future experimental programme on these type of experiment at n_TOF.Secondly, the student will contribute to the development of an experimental setup for detecting neutron induced charged particle reactions using an annular silicon detector. An experiment at n_TOF will be designed and performed to measure a material of interest to fusion technologies such as tungsten.Furthermore, the project will support and bolster the UK's involvement and contribution to the n_TOF facility, where many measurements of importance to nuclear technologies are performed each year.