Conceptual Design of a High-flux Multi-GeV Gamma-ray Spectrometer

• DOI: 10.1038/s41598-020-66832-x
• Publication Date: 2020-06-18T10:03:26Z
• Authors: K. Fleck; N. Cavanagh; G. Sarri
• Keywords: 0103 physical sciences; 530; 01 natural sciences; Article

AbstractWe present here a novel scheme for the high-resolution spectrometry of high-flux gamma-ray beams with energies per photon in the multi-GeV range. The spectrometer relies on the conversion of the gamma-ray photons into electron-positron pairs in a solid foil with high atomic number. The measured electron and positron spectra are then used to reconstruct the spectrum of the gamma-ray beam. The performance of the spectrometer has been numerically tested against the predicted photon spectra expected from non-linear Compton scattering in the proposed LUXE experiment, showing high fidelity in identifying distinctive features such as Compton edges and non-linearities.