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Consideration for a gamma source at EupraXia

Luca Serafini, Vittoria Petrillo, Alessio DelDotto, Illya Drebot, Anna Giribono, Andrea Ghigo, Stefano Romeo, Andrea Renato Rossi, Cristina Vaccarezza, Fabio Villa, Massimo Ferrario

TL;DR

The paper analyzes a Compton gamma-ray source driven by the EuPRAXIA plasma-accelerated electron beam interacting with a 1030 nm laser, focusing on two operating points (1 GeV in phase and 2.2 GeV in upgrade) and assessing photon yields, energies, and bandwidths. CAIN-based simulations, complemented by start-to-end beam parameters, show tunable gamma energies from ~11.5 to ~26.7 MeV at 1 GeV and up to ~87 MeV at 2.2 GeV, with per-shot yields around 3.9×10^7–7.2×10^7 photons and fluxes up to ~3.9×10^10 s^-1, while preserving a 3% bandwidth and laser-like polarization. The work argues that the first phase provides a competitive gamma source for nuclear photonics, and outlines substantial upgrades that would extend energy reach toward the quantum regime (up to ~450 MeV and beyond) as well as potential low-energy FICS operation (200–300 keV) via energy extraction. These results position EuPRAXIA as a compact, tunable platform for a broad range of nuclear physics applications, from photofission and GD resonance studies to neutron and proton polarizability measurements, with practical implications for future accelerator science and technologies.

Abstract

In this paper, we present the potentiality and the application of a Compton source driven by the electron beam of EuPRAXIA, in interaction with a commercially available infrared laser.

Consideration for a gamma source at EupraXia

TL;DR

The paper analyzes a Compton gamma-ray source driven by the EuPRAXIA plasma-accelerated electron beam interacting with a 1030 nm laser, focusing on two operating points (1 GeV in phase and 2.2 GeV in upgrade) and assessing photon yields, energies, and bandwidths. CAIN-based simulations, complemented by start-to-end beam parameters, show tunable gamma energies from ~11.5 to ~26.7 MeV at 1 GeV and up to ~87 MeV at 2.2 GeV, with per-shot yields around 3.9×10^7–7.2×10^7 photons and fluxes up to ~3.9×10^10 s^-1, while preserving a 3% bandwidth and laser-like polarization. The work argues that the first phase provides a competitive gamma source for nuclear photonics, and outlines substantial upgrades that would extend energy reach toward the quantum regime (up to ~450 MeV and beyond) as well as potential low-energy FICS operation (200–300 keV) via energy extraction. These results position EuPRAXIA as a compact, tunable platform for a broad range of nuclear physics applications, from photofission and GD resonance studies to neutron and proton polarizability measurements, with practical implications for future accelerator science and technologies.

Abstract

In this paper, we present the potentiality and the application of a Compton source driven by the electron beam of EuPRAXIA, in interaction with a commercially available infrared laser.
Paper Structure (4 sections, 3 equations, 2 figures, 4 tables)

This paper contains 4 sections, 3 equations, 2 figures, 4 tables.

Table of Contents

  1. State of the art and application of gamma-rays
  2. A Gamma-ray source at EuPRAXIA
  3. Scientific case of the EuPRAXIA gamma source
  4. Conclusion

Figures (2)

  • Figure 1: Total (in grey) and collimated (in red) spectrum of gamma-ray for electron energy at 1 GeV. Photons collected in 150 $\mu$rad, for a bandwidth of 3%. Bandwidth and number of photons as function of collimation angle.
  • Figure 2: Total (in grey) and collimated (in red) spectrum of gamma-ray for electron energy at 2.2 GeV. Photons collected in 70 $\mu$rad, for a bandwidth of 3%. Bandwidth and number of photons as function of collimation angle.