With the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray spectrometer intended for these high repetition rate experiments, with particular emphasis on functionality within a PW level laser-plasma interaction chamber's extreme conditions. The spectrometer uses stacked scintillators to accommodate a broad range of gamma-ray energies, demonstrating its adaptability for various experimental setups. Additionally, it has been engineered to maintain compactness, electromagnetic pulse resistance, and ISO-5 cleanliness requirements while ensuring high sensitivity. The spectrometer has been tested in real conditions inside the PW-class level interaction chamber at the BELLA center, LBNL. The paper also outlines the calibration process thanks to a 60Co radioactive source.
@article{arxiv.2311.05356,
title = {Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser-matter interaction},
author = {G. Fauvel and K. Tangtartharakul and A. Arefiev and J. De Chant and S. Hakimi and O. Klimo and M. Manuel and A. McIlvenny and K. Nakamura and L. Obst-Huebl and P. Rubovic and S. Weber and F. P. Condamine},
journal= {arXiv preprint arXiv:2311.05356},
year = {2024}
}