Abstract
A high-power neutron source system is very useful for multifunctional applications, such as material facilities for advanced nuclear power, space radiation studies, radiography and tomography. Here the idea of inclined dense granular flow is utilized and developed in a new conceptual design of a compact high-power target to produce a high-energy and high-flux neutron irradiation (the flux is up to 1015 n/cm2 /s or even 1016 ). Comparing to the traditional solid and liquid heavy metal targets, this design has advantages in material choice, fluid stability, heat removal, etc. In this paper the natures of the granular flows in an inclined chute are investigated and preliminary experimental and numerical results are reported. Then the feasibility of this design is discussed.
Highlights
In many areas of physics, chemistry, biology, materials, and nuclear engineering, to study the structure and functionality of materials, it is very valuable for a very intense source of neutrons
Spallation neutron source is an accelerator-driven facility to produce high intensity neutrons based on spallation reactions
Compared to currently wide used targets, the attractions for Dense Granular Target (DGT) include: 1) The flowing behaviors of grains in DGT are analogous to the fluids [8] and the deposited high power will be removed off-line
Summary
In many areas of physics, chemistry, biology, materials , and nuclear engineering, to study the structure and functionality of materials, it is very valuable for a very intense source of neutrons. Spallation neutron source is an accelerator-driven facility to produce high intensity neutrons based on spallation reactions. The new concept of gravity-driven Dense Granular Target (DGT) was proposed [6]. Compared to currently wide used targets, the attractions for DGT include: 1) The flowing behaviors of grains in DGT are analogous to the fluids [8] and the deposited high power will be removed off-line.
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