Abstract
In this manuscript we review the challenges of Compton backscattering sources in advancing photon beam performances in the 1 – 20 MeV energy range, underlining the design criteria bringing to maximum spectral luminosity and briefly describing the main achievements in conceiving and developing new devices (multi-bunch RF cavities and Laser recirculators) for the case of ELI-NP Gamma Beam System (ELI-NP-GBS).
Highlights
One of the main projects in progress in this field is the ELI-NP Gamma Beam System [2], designed and being constructed by the European EuroGammaS collaboration under a contract with IFIN-HH, the Romanian Institution in charge of developing the ELI-NuclearPhysics Romanian Pillar of E.L.I. (Extreme Light Infrastructure) in Bucharest
Where the first term in the denominator is responsible for the typical 4γ2 scaling of Thomson Sources, while the second term in the denominator accounts for quantum effects, namely the electron recoil, and it is responsible for the correct energy and momentum conservation in the scattering reaction
This second term is negligible for FEL’s and X-ray Thomson Sources, while it is small but not negligible for Compton Sources of Nuclear Physics and Photonics, and becomes the dominant term for deep Compton Sources as those planned for γ − γ colliders in TeV range
Summary
One of the main projects in progress in this field is the ELI-NP Gamma Beam System [2], designed and being constructed by the European EuroGammaS collaboration under a contract with IFIN-HH, the Romanian Institution in charge of developing the ELI-NuclearPhysics Romanian Pillar of E.L.I. (Extreme Light Infrastructure) in Bucharest. Quite often in the literature radiation sources based on back-scattering of optical photons carried by laser pulses by relativistic (MeV to GeV energy) electron beams are referred as either Thomson or Compton back-scattering Sources (hereafter referred as TCS).
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