We present the design, calculations and simulations of high-resolution concave-VLS-grating-based soft X-ray and VUV spectrographs, as well as a plane VLS grating instrument. We have designed a normal-incidence imaging VLS grating spectrograph for a 820 – 1690 Å spectral interval and a series of grazing-incidence VLS spectrographs with imaging capabilities. The experimentally recorded spectral images of laboratory laser plasmas were obtained with the aid of a VLS spectrometer based on a concave aperiodic multilayer mirror and a plane VLS grating. Two modifications of this spectrometer were implemented with two different VLS gratings. These modifications exhibit spectral resolution of 500 and 800 over the 125 – 300 Å spectral waveband. Spatial resolution corresponds to double CCD-detector pixel size.
Eugene A. Vishnyakov, Alexei O. Kolesnikov, Alexey N. Shatokhin, and Evgeny N. Ragozin, "Imaging VLS grating spectrographs," Proc. SPIE 10677, Unconventional Optical Imaging, 106770E (Presented at SPIE Photonics Europe: April 22, 2018; Published: 24 May 2018); https://doi.org/10.1117/12.2305918.
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