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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 0.4PW 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.
Highlights
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
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 multiGeV electrons passing through the high-field region into photons, each of which carries more than half of the electron initial energy
The clarification of various theoretical aspects [7,8,9,10,11,12,13,14] as well as the development of analytical [15] and numerical [16,17,18,19,20,21,22] approaches has been instrumental in revealing various peculiar effects such as stochasticity [23,24,25], straggling [17,26], quantum quenching [27], trapping in traveling [28,29] and standing electromagnetic (EM) waves [25,30,31,32,33] and the alteration of ponderomotive effects [25,34]. These findings encouraged several promising proposals of both current [35,36] and future experiments. This includes the creation of positron [37] and photon [38,39,40,41,42,43,44] sources as well as probing fundamental aspects of quantum electrodynamics (QED) and astrophysics by reaching extreme conditions [45,46]
Summary
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. 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 multiGeV 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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