Fresnel Zone Plates for RIXS

We have implemented and successfully tested off-axis transmission Fresnel zone plates as spectral analyzers for resonant inelastic X-ray scattering (RIXS). The imaging capabilities of zone plates allow for two-dimensional (2D) mapping [1]. By varying the photon energy along a line focus on the sample, the parallel recording of emission spectra over a range of excitation energies becomes possible [2]. Moreover, by scanning a line focus across the sample in one dimension, we efficiently recorded RIXS spectra spatially resolved in 2D, increasing the throughput by two orders of magnitude [3]. Due to the compact geometry of off-axis Fresnel zone plate analyzers, it is possible to perform RIXS experiments at two different resonances, simultaneously [4]. The presented scheme opens up a variety of novel measurements and efficient, ultra-fast time resolved investigations at X-ray Free-Electron Laser sources.

Publications

1. F. Marschall et al. Transmission zone plates as analyzers for efficient parallel 2D RIXS-mapping. Scientific Reports 7 (1), 1-7 (2017).
2. F. Marschall et al. Zone plates as imaging analyzers for resonant inelastic x-ray scattering. Optics Express 25 (14), 15624-15634 (2017)
3. F. Döring et al. 1D-full field microscopy of elastic and inelastic scattering with transmission off-axis Fresnel zone plates. Microscopy and Microanalysis 24 (S2), 182-183 (2018)
4. F. Döring et al. A zone-plate-based two-color spectrometer for indirect X-ray absorption spectroscopy. Journal of synchrotron radiation 26 (4), 1266-1271 (2019)