Abstract
RIKEN Accelerator-driven compact neutron source, RANS, has been operational since 2013. There are two major goals of RANS research and development. One is to establish a new compact low energy neutron non-destructive evaluation system on-site of floor-standing type for industrial use. Another goal is to invent a novel transportable compact neutron system for the preventive maintenance of large scale construction such as a bridge. The low energy transmission imaging, neutron diffractometer, small angle scattering instruments, fast neutron transmission imaging, fast neutron back scattering imaging, neutron induced prompt gamma-ray analysis and neutron activation analysis are available with RANS. To solve the lack of nuclear data to develop compact neutron sources, we have created new function which gives neutron spectrum from the 9Be +p reaction with protons of energy below 12 MeV. For further compact neutron system, RANS-II is now ready to generate neutrons in the RANS experimental hall with individual shielding system. The novel proton accelerator tube and 500 MHz solid state high-frequency amplifier for RANS-III, of a transportable neutron system, are now ready to be developed in RIKEN.
Highlights
Accelerator-driven compact neutron sources have attracted much attention in neutron and X-ray fields and in fields such as materials development aimed at significant weight reduction in automobiles and other transportations, cancer therapy, and non-destructive inspection technology
We have developed new formalism, a function, to give the total neutron production cross section, angular distribution, and energy spectrum via the 9Be + p reaction by fitting experimental data to characterize compact neutron sources with thick
Neutron non-destructive visualization with slow and fast neutron, neutron engineering diffraction for microstructural analysis of iron and steel samples, elemental analysis with neutron induced prompt gammaray activation analysis are the major subjects that we are requested to perform with RIKEN acceleratordriven compact neutron source (RANS) based on the strong request from the users of such field as industry, public work
Summary
Accelerator-driven compact neutron sources have attracted much attention in neutron and X-ray fields and in fields such as materials development aimed at significant weight reduction in automobiles and other transportations, cancer therapy, and non-destructive inspection technology. For the accelerator driven compact neutron source development, the discrepancy of the neutron spectrum and its angular distribution between any of nuclear data of 9Be +p reaction and experimental results, is widely recognized especially for the lower energy of proton. We have developed new formalism, a function, to give the total neutron production cross section, angular distribution, and energy spectrum via the 9Be + p reaction by fitting experimental data to characterize compact neutron sources with thick. For the design of new compact neutron sources with beryllium target and proton whose energy is less than 12 MeV, the program with this function is available. The neutron spectrum and angler distribution will be obtained when the target thickness, and proton energy are given
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