Transmutation prospect of long-lived nuclear waste induced by high-charge electron beam from laser plasma accelerator
Abstract
Photo-transmutation of long-lived nuclear waste induced by high-charge relativistic electron beam (e-beam) from laser plasma accelerator is demonstrated. Collimated relativistic e-beam with a high charge of approximately 100 nC is produced from high-intensity laser interaction with near-critical-density (NCD) plasma. Such e-beam impinges on a high-Z convertor and then radiates energetic bremsstrahlung photons with flux approaching 10^{11} per laser shot. Taking long-lived radionuclide ^{126}Sn as an example, the resulting transmutation reaction yield is the order of 10^{9} per laser shot, which is two orders of magnitude higher than obtained from previous studies. It is found that at lower densities, tightly focused laser irradiating relatively longer NCD plasmas can effectively enhance the transmutation efficiency. Furthermore, the photo-transmutation is generalized by considering mixed-nuclide waste samples, which suggests that the laser-accelerated high-charge e-beam could be an efficient tool to transmute long-lived nuclear waste.
Keywords
Cite
@article{arxiv.1705.05770,
title = {Transmutation prospect of long-lived nuclear waste induced by high-charge electron beam from laser plasma accelerator},
author = {X. L. Wang and Z. Y. Xu and W. Luo and H. Y. Lu and Z. C. Zhu and X. Q. Yan},
journal= {arXiv preprint arXiv:1705.05770},
year = {2020}
}
Comments
13 pages, 8 figures, it has been submitted to Physics of Plasma