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VITESS polarized neutron suite: Allows for the simulation of performance of any existing polarized neutron scattering instrument

机译:VITESS极化中子套件:可以模拟任何现有的极化中子散射仪的性能

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摘要

As neutron simulations packages are used for analysis of the expected performance for practically all newly built neutron instruments, possibilities for simulations with polarized neutrons have been relatively underdeveloped. During the last years we developed a new approach for the representation of time-dependent magnetic fields (both in magnitude and direction) for the VITESS simulation package. This allowed us to simulate the neutron spin dynamics in practically all polarized neutron devices (RF neutron flipper, adiabatic gradient RF flipper, the Drabkin resonator, etc.). In this article the above-mentioned VITESS instrument components (modules) will be presented and the simulated performance of a number of polarized neutron scattering instruments (NRSE, MIEZE, SESANS, etc.) will be demonstrated. Thus, we practically complete the polarized neutron suite of the VITESS, which seems sufficient for the simulation of performance of any existing polarized neutron scattering instrument. Future work will be concentrated on developments of dedicated sample modules (kernels) to allow for virtual experiments with VITESS.
机译:由于中子模拟软件包用于分析几乎所有新建中子仪器的预期性能,因此极化中子模拟的可能性相对不足。在过去的几年中,我们开发了一种新的方法来表示VITESS仿真程序包中随时间变化的磁场(大小和方向)。这使我们能够模拟几乎所有极化中子装置(RF中子鳍,绝热梯度RF鳍,Drabkin谐振器等)中的中子自旋动力学。在本文中,将介绍上述VITESS仪器的组件(模块),并演示许多极化中子散射仪器(NRSE,MIEZE,SESANS等)的模拟性能。因此,我们实际上完成了VITESS的极化中子套件,这似乎足以模拟任何现有极化中子散射仪器的性能。未来的工作将集中在专用样本模块(内核)的开发上,以允许使用VITESS进行虚拟实验。

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