2018/08/19 by Zhuo Li, Bin Li, Li, Zhuo +1
Chemistry · Engineering · Materials Science · #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optical Coatings and Gratings #Optics (physics.optics) #Photonic and Optical Devices #Spectroscopy and Laser Applications
paper · pdf · doi:10.48550/arxiv.1808.07559
openalex publication_date 2018/08/19 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
The optical design of a novel spectrometer is present, combining a cylindrically convex pre-mirror with a cylindrically concave VLS grating (both in meridional) to deliver a resolving power of 100,000-200,000 in 'water window' (2-5nm). More remarkably, unlike a typical RIXS spectrometer to obtain such high resolution by tight focusing or tiny confinement slit (<1μm), here the resolution could be achieved for an effective meridional source size of 50μm (r.m.s.). The overall optical aberrations of the system are well analysed and compensated, providing an excellent flat field at the detector domain throughout the whole spectral range. And a machine learning scheme - SVM is introduced to explore and reconstruct the optimal system with pretty high efficiency.