Modular soft x-ray spectrometer for applications in energy sciences and quantum materials

Yi De Chuang, Yu Cheng Shao, Alejandro Cruz, Kelly Hanzel, Adam Brown, Alex Frano, Ruimin Qiao, Brian Smith, Edward Domning, Shih Wen Huang, L. Andrew Wray, Wei Sheng Lee, Zhi Xun Shen, Thomas P. Devereaux, Jaw Wern Chiou, Way Faung Pong, Valeriy V. Yashchuk, Eric Gullikson, Ruben Reininger, Wanli YangJinghua Guo, Robert Duarte, Zahid Hussain

    Research output: Contribution to journalArticlepeer-review


    Over the past decade, the advances in grating-based soft X-ray spectrometers have revolutionized the soft X-ray spectroscopies in materials research. However, these novel spectrometers are mostly dedicated designs, which cannot be easily adopted for applications with diverging demands. Here we present a versatile spectrometer design concept based on the Hettrick-Underwood optical scheme that uses modular mechanical components. The spectrometer’s optics chamber can be used with gratings operated in either inside or outside orders, and the detector assembly can be reconfigured accordingly. The spectrometer can be designed to have high spectral resolution, exceeding 10 000 resolving power when using small source (∼1μm) and detector pixels (∼5μm) with high line density gratings (∼3000 lines/mm), or high throughput at moderate resolution. We report two such spectrometers with slightly different design goals and optical parameters in this paper. We show that the spectrometer with high throughput and large energy window is particularly useful for studying the sustainable energy materials. We demonstrate that the extensive resonant inelastic X-ray scattering (RIXS) map of battery cathode material LiNi1/3Co1/3Mn1/3O2 can be produced in few hours using such a spectrometer. Unlike analyzing only a handful of RIXS spectra taken at selected excitation photon energies across the elemental absorption edges to determine various spectral features like the localized dd excitations and non-resonant fluorescence emissions, these features can be easily identified in the RIXS maps. Studying such RIXS maps could reveal novel transition metal redox in battery compounds that are sometimes hard to be unambiguously identified in X-ray absorption and emission spectra. We propose that this modular spectrometer design can serve as the platform for further customization to meet specific scientific demands.

    Original languageEnglish (US)
    Article number013110
    JournalReview of Scientific Instruments
    Issue number1
    StatePublished - Jan 1 2017

    ASJC Scopus subject areas

    • Instrumentation


    Dive into the research topics of 'Modular soft x-ray spectrometer for applications in energy sciences and quantum materials'. Together they form a unique fingerprint.

    Cite this