This paper proposes a sub-critical nuclear energy system driven by fusion neutron source, FDS, which can be used to transmute long-lived radioactive wastes and to produce fissile nuclear fuel as a way for early applic...This paper proposes a sub-critical nuclear energy system driven by fusion neutron source, FDS, which can be used to transmute long-lived radioactive wastes and to produce fissile nuclear fuel as a way for early application of fusion technology. The necessity and feasibility to develop that system in China are illustrated on the basis of prediction of the demand of energy source in the first half of the 21th century, the status of current fission energy supply and the progress in fusion technology in the world. The characteristics of fusion neutron driver and the potential for transmutation of long-lived nuclear wastes and breeding of fissile nuclear fuel in a blanket are analyzed. A scenario of development steps is proposed.展开更多
X-ray scattering has been an indispensable tool in advancing our understanding of matter,from the first evidence of the crystal lattice to recent discoveries of nuclei’s fastest dynamics.In addition to the lattice,ul...X-ray scattering has been an indispensable tool in advancing our understanding of matter,from the first evidence of the crystal lattice to recent discoveries of nuclei’s fastest dynamics.In addition to the lattice,ultrafast resonant elastic scattering of soft X-rays provides a sensitive probe of charge,spin,and orbital order with unparalleled nanometre spatial and femto-to picosecond temporal resolution.However,the full potential of this technique remains largely unexploited due to its high demand on the X-ray source.Only a selected number of instruments at large-scale facilities can deliver the required short-pulsed and wavelength-tunable radiation,rendering laboratory-scale experiments elusive so far.Here,we demonstrate time-resolved X-ray scattering with spectroscopic contrast at a laboratory-based instrument using the soft-X-ray radiation emitted from a laser-driven plasma source.Specifically,we investigate the photo-induced response of magnetic domains emerging in a ferrimagnetic FeGd heterostructure with 9 ps temporal resolution.The achieved sensitivity allows for tracking the reorganisation of the domain network on pico-to nanosecond time scales in great detail.This instrumental development and experimental demonstration break new ground for studying material dynamics in a wide range of laterally ordered systems in a flexible laboratory environment.展开更多
文摘This paper proposes a sub-critical nuclear energy system driven by fusion neutron source, FDS, which can be used to transmute long-lived radioactive wastes and to produce fissile nuclear fuel as a way for early application of fusion technology. The necessity and feasibility to develop that system in China are illustrated on the basis of prediction of the demand of energy source in the first half of the 21th century, the status of current fission energy supply and the progress in fusion technology in the world. The characteristics of fusion neutron driver and the potential for transmutation of long-lived nuclear wastes and breeding of fissile nuclear fuel in a blanket are analyzed. A scenario of development steps is proposed.
基金funding from the Leibniz Association through the Leibniz Junior Research Group Grant No.J134/2022from the Deutsche Forschungsgemeinschaft(DFG)through TRR 227,Project No.A02.
文摘X-ray scattering has been an indispensable tool in advancing our understanding of matter,from the first evidence of the crystal lattice to recent discoveries of nuclei’s fastest dynamics.In addition to the lattice,ultrafast resonant elastic scattering of soft X-rays provides a sensitive probe of charge,spin,and orbital order with unparalleled nanometre spatial and femto-to picosecond temporal resolution.However,the full potential of this technique remains largely unexploited due to its high demand on the X-ray source.Only a selected number of instruments at large-scale facilities can deliver the required short-pulsed and wavelength-tunable radiation,rendering laboratory-scale experiments elusive so far.Here,we demonstrate time-resolved X-ray scattering with spectroscopic contrast at a laboratory-based instrument using the soft-X-ray radiation emitted from a laser-driven plasma source.Specifically,we investigate the photo-induced response of magnetic domains emerging in a ferrimagnetic FeGd heterostructure with 9 ps temporal resolution.The achieved sensitivity allows for tracking the reorganisation of the domain network on pico-to nanosecond time scales in great detail.This instrumental development and experimental demonstration break new ground for studying material dynamics in a wide range of laterally ordered systems in a flexible laboratory environment.
