Radiation emitted by charged particles in ordered crystalline structures can, through channeling radiation and coherent bremsstrahlung, yield enhanced, quasi-monochromatic photon peaks compared with the broad spectra from amorphous bremsstrahlung targets. For electron beams from 50 MeV to several GeV, the photon yield can increase and the spectrum can be tuned by varying beam and crystal parameters[1]. These properties make oriented crystal radiators attractive for accelerator-based applications requiring high spectral brilliance, tunability, small angular divergence, such as polarized photon beams, positron production and X-ray generation, with implications for medical uses and detector calibration[2]. Within the INFN CORAL (Crystal radiatORs for AcceLerators) project, we use Geant4 simulations to model coherent processes and guide target optimization, including thermo-mechanical stress under heating and irradiation[3]. Forthcoming experiments will measure photon yield, spectral characteristics and emission stability over a wide energy range, including studies of the impact of heating and irradiation on intensity and degree of monochromaticity, in response to growing interest in replacing conventional bremsstrahlung targets for applications from nuclear fission and transmutation to high-intensity γ-ray beams for fundamental physics. [1]V.Baier,V.Katkov,V.Strakhovenko,Singapore,1998 [2]G.Sushko, A.Korol,A.Solov’yov,PRAB,27(2024)100703 [3]A.Sytov et al., JKPS 83,132–139(2023)

Radiation emitted by charged particles in ordered crystalline structures can, through channeling radiation and coherent bremsstrahlung, yield enhanced, quasi-monochromatic photon peaks compared with the broad spectra from amorphous bremsstrahlung targets. For electron beams from 50 MeV to several GeV, the photon yield can increase and the spectrum can be tuned by varying beam and crystal parameters[1]. These properties make oriented crystal radiators attractive for accelerator-based applications requiring high spectral brilliance, tunability, small angular divergence, such as polarized photon beams, positron production and X-ray generation, with implications for medical uses and detector calibration[2]. Within the INFN CORAL (Crystal radiatORs for AcceLerators) project, we use Geant4 simulations to model coherent processes and guide target optimization, including thermo-mechanical stress under heating and irradiation[3]. Forthcoming experiments will measure photon yield, spectral characteristics and emission stability over a wide energy range, including studies of the impact of heating and irradiation on intensity and degree of monochromaticity, in response to growing interest in replacing conventional bremsstrahlung targets for applications from nuclear fission and transmutation to high-intensity γ-ray beams for fundamental physics. [1]V.Baier,V.Katkov,V.Strakhovenko,Singapore,1998 [2]G.Sushko, A.Korol,A.Solov’yov,PRAB,27(2024)100703 [3]A.Sytov et al., JKPS 83,132–139(2023)