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Title: Positron production at extreme light infrastructure – nuclear physics (ELI-NP)

Applied and material physics studies with positron beams of Fermi–surfaces, defects, interfaces etc. offer excellent diagnostics tools. At ELI-NP, an intense γ beam of about 10{sup 11} photons/s with energies up to 3.5 MeV will be used to generate a positron beam via pair production in a tungsten converter target. To obtain a high intensity beam of moderated positrons the design of the positron source is of high importance. The design of a dedicated positron source at ELI–NP is being investigated based on extensive GEANT4 simulations. The goal of the simulations is to optimize the geometry of the target and the gamma beam collimation. We present here the characteristics of the positron beam obtained for different geometries of the converter target.
Authors:
; ;  [1]
  1. Extreme Light Infrastructure - Nuclear Physics, IFIN-HH, Magurele-Bucharest (Romania)
Publication Date:
OSTI Identifier:
22390999
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1645; Journal Issue: 1; Conference: Carpathian Summer School of Physics 2014, Sinaia (Romania), 13-26 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; FERMI LEVEL; G CODES; INTERFACES; MEV RANGE; PAIR PRODUCTION; PHOTONS; POSITRON BEAMS; POSITRON SOURCES; POSITRONS; TUNGSTEN; VISIBLE RADIATION