Soft X-Ray Emission Spectroscopy

本提案描述了利用软X射线发射光谱和非弹性电子散射光谱这两种主要技术来了解固体电子结构的各个方面的实验。他们设计并建造了一台具有许多独特功能的软X射线发射光谱仪。样品室是一个特高压系统，配有一把用于清洗的Ar离子枪和一台用于检查样品表面的俄歇光谱仪。环形全息衍射光栅将发射光谱聚焦到一个高量子效率的位置灵敏探测器上。他们最近增加了一个样品进入气闸，这样就可以在不让空气进入房间的情况下更换样品。样品室中的压力在10到负10的范围内。非弹性电子散射谱仪是几年前建造的，已被广泛用于各种工程。它们能够测量揭示动力学效应的光谱特征的动量传递依赖关系。此外，还可以复盖较宽的能量范围，从而可以进行Kramers-Kronig分析。

Experiments directed at understanding various aspects of the electronic structure of solids using two primary techniques are described in this proposal: soft x-ray emission spectroscopy and inelastic electron scattering spectroscopy. They have designed and built a soft x-ray emission spectrograph with a number of unique features. The sample chamber is a UHV system with an argon ion gun for cleaning and an Auger spectrometer to check sample surfaces. The toroidal holographic diffraction gratings focus the emission spectrum onto a high quantum efficiency- position-sensitive detector. They have recently added a sample entry airlock so samples can be changed without letting air in the chamber. The pressure in the sample chamber is in the 10 to the minus ten range. The inelastic electron scattering spectrometer was built several years ago, and has been used for a wide variety of projects. They are able to measure the momentum transfer dependence of spectral features revealing dynamical effects. In addition a wide energy range can be covered allowing a Kramers-Kronig analysis to be carried out.