论文标题
测量的速度光谱和中子密度的PF2超低 - 中子束端口端口laue-langevin
Measured velocity spectra and neutron densities of the PF2 ultracold-neutron beam ports at the Institut Laue--Langevin
论文作者
论文摘要
超代理中子（UCN）是基本物理实验的有用工具。它们可用于探测自由中子的寿命，在标准模型之外寻找新的CP违反过程和外来相互作用，进行拉姆西光谱，并进行中子光学干扰实验。所有这些实验都需要良好统计数据的高中子计数率。为了获得实验光束时间的最佳开发，需要准备这些实验，有时甚至会预先模拟。为此，重要的是要了解每个梁位置处的速度依赖性UCN通量。知道绝对中子通量还可以对先前收集的数据进行绝对校准。使用同一时间的实验设置，我们测量了在Grenoble Institut Laue-Langevin Institut Laue-Langevin的四个UCN梁端口中的三个中子通量。这些梁端口通常用于UCN通量实验和原理测试。
Ultracold neutrons (UCNs) are a useful tool for fundamental physics experiments. They can be used to probe the lifetime of free neutrons, search for new CP violating processes and exotic interactions beyond the Standard Model, perform Ramsey spectroscopy, and carry out neutron-optical interference experiments. All of these experiments require high neutron count rates for good statistics. For optimal exploitation of experimental beam time, these experiments need to be prepared and, at times, even simulated in advance. To this end, it is crucial to know the velocity-dependent UCN flux at each beam position. Knowing the absolute neutron flux also allows for an absolute calibration of previously gathered data. Using the same time-of-fight experimental setup, we have measured the differential neutron flux of three out of the four UCN beam ports at the PF2 instrument at Institut Laue--Langevin, Grenoble. These beam ports are commonly used for UCN flux experiments and proof-of-principle tests.
