At Argonne National Laboratory, we are developing hard X-ray (2 to 20 keV) Transition Edge Sensor (TES) arrays for beamline science. The significantly improved energy resolution provided by superconducting detectors compared to semiconductor-based energy-dispersive detectors, but with better collection efficiency than wavelength-dispersive instruments, will enable greatly improved X-ray emission and absorption spectroscopic measurements. A prototype instrument with 24 microwave-frequency multiplexed pixels is now in testing at the Advanced Photon Source (APS) 1-BM beamline. Initial measurements show an energy resolution ten times better (150 eV compared to < 15 eV) than the silicon-drift detectors currently available to APS beamline users, and in particular demonstrate the ability to resolve closely-spaced emission lines in samples containing multiple transition metal elements, such as integrated circuits. Comparing fluorescence spectra of integrated circuits measured with our TESs at the beamline to those measured with silicon detectors, we find emission lines and elements largely hidden (e.g. Hf alongside Cu) from a semiconductor-based detector but well resolved by a TES. This directly shows the strengths of TES-based instruments in fluorescence mapping.
Development and extension of a monochromatic neutron beamline for neutron polarimetry device characterization at the Spallation Neutron Source
Lawrence Livermore National Laboratory(劳伦斯利弗莫尔国家实验室);University of Tennessee(田纳西大学);Oak Ridge National Laboratory(橡树岭国家实验室);Kellogg Radiation Laboratory, California Institute of Technology(加州理工学院凯洛格辐射实验室)
Soft X-ray spectroscopies in liquids and at solid-liquid interface at BACH beamline at Elettra
在意大利的里雅斯特Elettra同步加速器运行的Istituto Catenina dei Materiali-Consiglio Nazionale delle Ricerche(IOM-CNR)的高级双色光束线(BACH)在极紫外(EUV)-软X射线光子能量范围内工作,具有可选择的光偏振、高能量分辨率、亮度和时间分辨率。光束线为材料的电子、化学、结构、磁性和动力学性质的研究提供了一种多技术方法。最近的三个终端站之一已致力于实验的基础上在固/液界面和光催化或电化学反应过程中的电子转移过程。开发了在环境压力下在液体和试剂气体存在下进行软X射线光谱的合适的池。在这里,我们提出了两种类型的静态电池工作在传输或荧光产率,和电化学流动电池,允许进行循环伏安法原位,电沉积在工作电极(WE)和研究化学反应在operando条件。X射线吸收光谱(XAS)的测量在环境条件下进行,并在液体中的电化学实验的例子。
A new beamline for Resonant Excitation of Beams with Electromagnetic fields and Lasers (REBEL) and Stopping and Trapping of Radioactive Isotopes for Precision Experiments (STRIPE)
Development of an Extensible Unified Control System Using the STARS Framework and Common Commands for Detector Control
Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)(高能加速器研究机构物质结构科学研究所);Materials Structure Science Program, Graduate Institute for Advanced Studies, Graduate University for Advanced Studies (SOKENDAI)(高级研究大学物质结构科学项目研究生院);Graduate School of Pure and Applied Sciences(理学院研究生院)