The optimization on neutronic performance of the granular spallation target by using low-density porous tungsten
| Autor: | Yaling Zhang, Liangwen Chen, Zhi-Lei Zhang, Xuesong Yan, Xunchao Zhang, Jian-Yang Li, Xiaofei Gao, Han-Jie Cai, Lin Yu, Lei Yang |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Neutron transport 020209 energy Nuclear engineering chemistry.chemical_element 02 engineering and technology Tungsten 021001 nanoscience & nanotechnology chemistry 0202 electrical engineering electronic engineering information engineering Low density Neutron source Neutron Spallation 0210 nano-technology Porosity Instrumentation Leakage (electronics) |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 916:22-31 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2018.08.071 |
| Popis: | The concept of gravity-driven Dense Granular Target (DGT) has been proposed and tungsten granule is one of the candidate target materials. With the increase of DGT diameter, the source efficiency is significantly reduced, which is not conducive to the design of high-power. Low density porous tungsten particles are proposed as the target material of DGT instead of the natural tungsten. First, the neutronics of the bare target have been studied with porous tungsten granule density using Monte Carlo code. An ADS model was then set up to evaluate the neutron sources performance caused by density variation of porous tungsten granule. The results show that there is an optimal combination of tungsten granular density and target diameter to make the utmost of leakage neutrons. In the ADS driven by tungsten DGT, an appropriate density porous tungsten as the target material can effectively increase the source efficiency, reduce the beam requirement and the thermal deposition on the target. |
| Databáze: | OpenAIRE |
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