Monitoring mixed neutron-proton field near the primary proton and deuteron beams in spallation targets

Indian Journal of Pure & Applied Physics

article

P Tichý¹  J Adam¹  A A Baldin¹  P Chudoba²  W I Furman¹  S A Gustov¹  J H Khushvaktov¹  A Krása⁷  M Majerle²  I I Mar’in¹  A A Solnyshkin¹  M Suchopár⁸  J Svoboda¹  O Svoboda²  S I Tyutyunnikov¹  J Vrzalová¹  V Wagner²  L Závorka⁹  M Zeman¹ 

[1] Joint Institute for Nuclear Research;Nuclear Physics Institute of the CAS;Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague;Faculty of Electrical Engineering and Communication, Brno University of Technology;Institute for Advanced Studies "OMEGA", Universitetskaya 19;Institute of Nuclear Physics ASRU;Belgian Nuclear Research Centre SCK-CEN;ÚJV Řež;Los Alamos National Laboratory

关键词: Accelerator-driven systems (ADS);    Subcritical assembly;    Neutron flux;    Monte Carlo;    Activation technique;    High-energy beam;    Phasotron;    Nuclotron;    Article;   

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

At the Joint Institute for Nuclear Research (JINR) we are involved in the Accelerator-Driven-System (ADS) research. We perform experiments with assemblies composed of a spallation target and a subcritical blanket irradiated with high-energy proton or deuteron beams that generate high-energy neutron fields by spallation and fission reactions. In this paper, three uranium assemblies are presented: Energy plus Transmutation (E+T), QUINTA and BURAN. We discuss the results of the E+T and QUINTA irradiations by 1.6 GeV deuterons and 660 MeV protons, respectively. We have focused on the regions close to the primary beam passage through the targets. The field has been measured using activation detectors of 209Bi, 59Co, and natPb. Monte Carlo simulations using MCNPX 2.7.0 have been performed and compared to the experimental results. We discovered that the field intensity near the primary beam is very dependent on the precision of the accelerator beam settings. Therefore, a Monte Carlo-based study of the influence of the uncertainty of primary proton beam parameters on experimental result accuracy of the QUINTA assembly has been carried out. The usage of MCNPX 2.7.0 in the future BURAN irradiations has been assessed.

【 授权许可】

Unknown