Abstract
A comparative study of the energy efficiency of proton beams with an energy from 0.5 GeV to 4 GeV and light ion beams (7Li, 9Be, 11B, and 12C) with energies from 0.25 AGeV to 1 AGeV in natural and enriched quasi-infinite U target is presented. The numerical results on the particle transport and interaction are obtained using the code Geant4. The following target optimization issues are addressed: the beam window dimensions, and the possibility to use a core from low Z materials. The best solution for ADS from the point of view of the energy gain and miniaturization is obtained for 7Li or 9Be beam with an energy of 0.3–0.4 AGeV and a target with Be core.
Highlights
The use of proton beams for energy production in accelerator-driven systems (ADS) was extensively investigated and the general opinion is that optimal for ADS is a proton beam with energy ∼ 1 GeV [1]
The first set of simulations was performed in a natU target irradiated with protons and ions with masses until 40Ca and energies from 0.3 AGeV to 10 AGeV
When accelerated in a synchrotron or linac ion beams starting with 7Li demonstrate higher energetic efficiency than protons.The maximum efficiency for ions with higher masses is reached at higher energies
Summary
The use of proton beams for energy production in accelerator-driven systems (ADS) was extensively investigated and the general opinion is that optimal for ADS is a proton beam with energy ∼ 1 GeV [1]. The possibility to use heavy ion beams was less analyzed and the conclusions of authors are contradictory [2]–[3]. Our results presented in [4] show that one can get a higher efficiency by accelerating heavier ions. In the present work we analyse in more detail the use of light ion beams at energies below 1 AGeV
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