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Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production

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Bibliographic Details
Title: Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production
Authors: Jansen, O., Wang, T., Stark, D.J., D'Humières, E., Toncian, T., Arefiev, A.V.
Contributors: Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB)
Source: Plasma Phys.Control.Fusion ; https://hal.archives-ouvertes.fr/hal-01815289 ; Plasma Phys.Control.Fusion, 2018, 60 (5), pp.054006. ⟨10.1088/1361-6587/aab222⟩
Publisher Information: HAL CCSD
Publication Year: 2018
Subject Terms: plasma, ultra-high magnetic fields, relativistic transparency, laser acceleration, pair creation, plasma channel, high energy radiation, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], socio, geo
Description: International audience ; The ability of an intense laser pulse to propagate in a classically over-critical plasma through the phenomenon of relativistic transparency is shown to facilitate the generation of strong plasma magnetic fields. Particle-in-cell simulations demonstrate that these fields significantly enhance the radiation rates of the laser-irradiated electrons, and furthermore they collimate the emission so that a directed and dense beam of multi-MeV gamma-rays is achievable. This capability can be exploited for electron–positron pair production via the linear Breit–Wheeler process by colliding two such dense beams. Presented simulations show that more than 103 pairs can be produced in such a setup, and the directionality of the positrons can be controlled by the angle of incidence between the beams.
Document Type: article in journal/newspaper
Language: English
Relation: https://hal.archives-ouvertes.fr/hal-01815289
Availability: https://hal.archives-ouvertes.fr/hal-01815289
Rights: undefined
Accession Number: edsbas.8DAAB66F
Database: BASE
Description
Abstract:International audience ; The ability of an intense laser pulse to propagate in a classically over-critical plasma through the phenomenon of relativistic transparency is shown to facilitate the generation of strong plasma magnetic fields. Particle-in-cell simulations demonstrate that these fields significantly enhance the radiation rates of the laser-irradiated electrons, and furthermore they collimate the emission so that a directed and dense beam of multi-MeV gamma-rays is achievable. This capability can be exploited for electron–positron pair production via the linear Breit–Wheeler process by colliding two such dense beams. Presented simulations show that more than 103 pairs can be produced in such a setup, and the directionality of the positrons can be controlled by the angle of incidence between the beams.