Ultra-compact x-ray spectrometer for high-repetition-rate laser-plasma experiments

G Zeraouli; D Mariscal; E Grace; G G Scott; K K Swanson; R Simpson; B Z Djordjevic; R Nedbailo; H Song; J Morrison; J Park; R Hollinger; S Wang; J J Rocca; T Ma

doi:10.1063/5.0100970

Ultra-compact x-ray spectrometer for high-repetition-rate laser-plasma experiments

Rev Sci Instrum. 2022 Nov 1;93(11):113508. doi: 10.1063/5.0100970.

Authors

G Zeraouli¹, D Mariscal², E Grace², G G Scott², K K Swanson², R Simpson², B Z Djordjevic², R Nedbailo¹, H Song¹, J Morrison¹, J Park¹, R Hollinger¹, S Wang¹, J J Rocca¹, T Ma²

Affiliations

¹ Colorado State University, Fort Collins, Colorado 80523, USA.
² Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

PMID: 36461516
DOI: 10.1063/5.0100970

Abstract

We present in this work the development of an ultra-compact, multi-channel x-ray spectrometer (UCXS). This diagnostic has been specially built and adapted to perform at high-repetition-rate (>1 Hz) for high-intensity, short-pulse laser plasma experiments. X-ray filters of varying materials and thicknesses are chosen to provide spectral resolution up to ΔE ≈ 1 keV over the x-ray energy range of 1-30 keV. These filters are distributed over a total of 25 channels, where each x-ray filter is coupled to a single scintillator. The UCXS is designed to detect and resolve a large variety of laser-driven x-ray sources such as low energy bremsstrahlung emission, fluorescence, and betatron radiation (up to 30 keV). Preliminary results from commissioning experiments at the ABL laser facility at Colorado State University are provided.