纵向中子共振自旋回波谱仪RESEDA
The longitudinal neutron resonant spin echo spectrometer RESEDA
摘要：
介绍了德国加尔兴Heinz Maier-Leibnitz Zentrum（MLZ）中子共振自旋回波（NRSE）谱仪RESEDA的仪器布局和技术实现。RESEDA基于纵向场配置，与传统的横向布局相比，提高了光谱仪的动态范围和最大分辨率。共振中子自旋回波技术可以实现两种互补的实现方式：一种纵向NRSE（LNRSE）选项，可与经典中子自旋回波（NSE）方法相媲美，用于实现最高的能量分辨率和大的动量传递;另一种零努力强度调制（MIEZE）选项，可用于去极化样品或样品环境，如高磁场和强非相干散射样品。凭借其出色的动态范围，超过名义上的七个数量级，这两个选项涵盖了在硬和软凝聚态系统的超高分辨率中子光谱学的新领域。在本文中，RESEDA的概念以及技术实现与参考测量一起报告。
英文摘要：
The instrumental layout and technical realisation of the neutron resonant spin echo (NRSE) spectrometer RESEDA at the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching, Germany, is presented. RESEDA is based on a longitudinal field configuration, boosting both dynamic range and maximum resolution of the spectrometer compared to the conventional transverse layout. The resonant neutron spin echo technique enables the realisation of two complementary implementations: A longitudinal NRSE (LNRSE) option comparable to the classical neutron spin echo (NSE) method for highest energy resolution and large momentum transfers as well as a Modulation of Intensity with Zero Effort (MIEZE) option for depolarising samples or sample environments such as high magnetic fields, and strong incoherent scattering samples. With their outstanding dynamic range, exceeding nominally seven orders of magnitude, both options cover new fields for ultra-high resolution neutron spectroscopy in hard and soft condensed matter systems. In this paper the concept of RESEDA as well as the technical realisation along with reference measurements are reported.
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