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27 March 2022 Study on neutronics performance of the Soller collimator for neutron radiography based on Geant4
Lianxin Zhang, Size Chen, Zaodi Zhang, Lei Ren, Taosheng Li
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169BS (2022) https://doi.org/10.1117/12.2627034
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
Soller collimators can efficiently produce thermal neutron beams with a high collimation ratio. In order to promote the application of Soller collimators in neutron radiography systems, different neutronics designs of Soller collimators are compared by using the GEANT4 program. The calculations show that the Soller collimator with square structure has best neutron beam compared with round and hexagon structure; The neutron flux is positively associated with the neutron emission area of collimator; B4C/Al has best neutronics performance as wall material of collimator compared with Fe, Gd2O3 and Cd. Based on the above results, a Soller collimator with optimized parameters was compared with a traditional divergent collimator. The results show that the Soller collimator can provide higher-quality beam conditions for neutron radiography and has the potential to be used in miniaturized neutron radiography systems.
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Lianxin Zhang, Size Chen, Zaodi Zhang, Lei Ren, and Taosheng Li "Study on neutronics performance of the Soller collimator for neutron radiography based on Geant4", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169BS (27 March 2022); https://doi.org/10.1117/12.2627034
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KEYWORDS
Collimators
Collimation
Radiography
Absorption
Image resolution
Optical simulations
Spatial resolution
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