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arXiv · 2312.02924

High-rate electron detectors to study Compton scattering in non-perturbative QED

Antonios Athanassiadis·John Hallford·Louis Helary·Luke Hendriks·Ruth Magdalena Jacobs·Jenny List·Gudrid Moortgat-Pick·Evan Ranken·Stefan Schmitt·Matthew Wing
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Abstract

Research in non-perturbative QED in strong-field backgrounds has gained interest in recent years, due to advances in high-intensity laser technologies that make extreme fields accessible in the laboratory. One key signature of strong-field QED is non-linear Compton scattering in collisions between a relativistic electron beam and a high-intensity laser pulse. In the vicinity of strong fields, the electron gains a larger effective mass, which leads to a laser-intensity-dependent shift of the kinematic Compton edge and the appearance of higher-order harmonics in the energy spectrum. One of the challenges of measuring the Compton energy spectrum in laser-electron-beam collisions is the enormous flux of outgoing Compton-scattered electrons and photons, ranging from $10^3$ to $10^9$ particles per collision. We present a combined detector system for high-rate Compton electron detection in the context of the planned LUXE experiment, consisting of a spatially segmented gas-filled Cherenkov detector and a scintillator screen imaged by an optical camera system. The detectors are placed in a forward dipole spectrometer to resolve the electron energy spectrum. Finally, we discuss techniques to reconstruct the non-linear Compton electron energy spectrum from the high-rate electron detection system and to extract the features of non-perturbative QED from the spectrum.

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Antonios Athanassiadis, John Hallford, Louis Helary, Luke Hendriks, Ruth Magdalena Jacobs, Jenny List, Gudrid Moortgat-Pick, Evan Ranken, Stefan Schmitt, Matthew Wing. 2023-12-05. High-rate electron detectors to study Compton scattering in non-perturbative QED. https://arxiv.org/abs/2312.02924

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