论文标题
纵向中子谐振旋转回波光谱仪的Miasans reseda
MIASANS at the longitudinal neutron resonant spin-echo spectrometer RESEDA
论文作者
论文摘要
Reseda（用于不同应用的共振旋转回波）仪器已针对广泛参数范围内准弹性和非弹性过程的中子散射测量进行了优化。 Reseda的一个光谱仪臂配置为Mieze（强度的调节，用零努力）技术，其中测量的信号是由两个精确调谐的射频（RF）弹奏者制备的中子强度的振荡。使用Mieze，所有自旋操作都是在光束到达样品之前执行的，因此在那里的任何去极化条件（即磁性材料和场）不会破坏样品散射的信号。 Mieze光谱仪正在针对小角度中子散射（Miasans）的需求进一步优化，这是两种技术的空间和动态分辨能力的多功能组合。我们介绍了（i）新安装的超导螺线管作为RF脚板的一部分的当前状态，以显着扩展动态范围（ii）在新的较大的Sans-Sans-type真空管中的转换阶段开发和安装新探测器的灵活性，以使用角度覆盖和分辨率和（ii II）降低背景。
The RESEDA (Resonant Spin-Echo for Diverse Applications) instrument has been optimized for neutron scattering measurements of quasi-elastic and inelastic processes over a wide parameter range. One spectrometer arm of RESEDA is configured for the MIEZE (Modulation of Intensity with Zero Effort) technique, where the measured signal is an oscillation in neutron intensity over time prepared by two precisely tuned radio-frequency (RF) flippers. With MIEZE, all spin-manipulations are performed before the beam reaches the sample, and thus the signal from sample scattering is not disrupted by any depolarizing conditions there (i.e. magnetic materials and fields). The MIEZE spectrometer is being further optimized for the requirements of small angle neutron scattering (MIASANS), a versatile combination of the spatial and dynamical resolving power of both techniques. We present the current status of (i) the newly installed superconducting solenoids as part of the RF flippers to significantly extend the dynamic range (ii) the development and installation of a new detector on a translation stage within a new larger SANS-type vacuum vessel for flexibility with angular coverage and resolution, and (iii) the efforts to reduce background.
