Power Scaling for Collimated $\gamma$-Ray Beams Generated by Structured Laser-Irradiated Targets and Its Application to Two-Photon Pair Production - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phys.Rev.Applied Année : 2020

Power Scaling for Collimated $\gamma$-Ray Beams Generated by Structured Laser-Irradiated Targets and Its Application to Two-Photon Pair Production

T. Wang
  • Fonction : Auteur
Z. Gong
  • Fonction : Auteur
O. Jansen
  • Fonction : Auteur
D. Stutman
  • Fonction : Auteur
T. Toncian
A. Arefiev
  • Fonction : Auteur

Résumé

Using three-dimensional kinetic simulations, we examine the emission of collimated γ-ray beams from structured laser-irradiated targets with a prefilled cylindrical channel and its scaling with laser power (in the multi-PW range). The laser power is increased by increasing the laser energy and the size of the focal spot while keeping the peak intensity fixed at 5×1022W/cm2. The channel radius is increased proportionally to accommodate the change in laser spot size. The efficiency of conversion of the laser energy into a beam of MeV-level γ rays (with a 10∘ opening angle) increases rapidly with the incident laser power P before it roughly saturates above P≈4PW. Detailed particle tracking reveals that the power scaling is a result of enhanced electron acceleration at higher laser powers. One application that directly benefits from such a strong scaling is pair production via two-photon collisions. We investigate two schemes for generating pairs through the linear Breit-Wheeler process: colliding two γ-ray beams and colliding one γ-ray beam with black-body radiation. The two scenarios project up to 104 and 105 pairs, respectively, for the γ-ray beams generated at P=4PW. A comparison with a regime of laser-irradiated hollow channels corroborates the robustness of the setup with prefilled channels.

Dates et versions

hal-02739849 , version 1 (02-06-2020)

Identifiants

Citer

T. Wang, X. Ribeyre, Z. Gong, O. Jansen, E. d'Humières, et al.. Power Scaling for Collimated $\gamma$-Ray Beams Generated by Structured Laser-Irradiated Targets and Its Application to Two-Photon Pair Production. Phys.Rev.Applied, 2020, 13 (5), pp.054024. ⟨10.1103/PhysRevApplied.13.054024⟩. ⟨hal-02739849⟩
21 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More