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Laser-Particle Collider for Multi-GeV Photon Production.

  • Author(s): Magnusson, J
  • Gonoskov, A
  • Marklund, M
  • Esirkepov, T Zh
  • Koga, JK
  • Kondo, K
  • Kando, M
  • Bulanov, SV
  • Korn, G
  • Bulanov, SS
  • et al.
Abstract

As an alternative to Compton backscattering and bremsstrahlung, the process of colliding high-energy electron beams with strong laser fields can more efficiently provide both a cleaner and brighter source of photons in the multi-GeV range for fundamental studies in nuclear and quark-gluon physics. In order to favor the emission of high-energy quanta and minimize their decay into electron-positron pairs, the fields must not only be sufficiently strong, but also well localized. We here examine these aspects and develop the concept of a laser-particle collider tailored for high-energy photon generation. We show that the use of multiple colliding laser pulses with 0.4 PW of total power is capable of converting more than 18% of multi-GeV electrons passing through the high-field region into photons, each of which carries more than half of the electron initial energy.

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