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

0525554 - ÚJF 2021 RIV IN eng J - Journal Article
Tichý, Pavel - Adam, J. - Baldin, A. A. - Chudoba, Petr - Furman, W. - Gustov, S. A. - Khushvaktov, J. - Krása, A. - Majerle, Mitja - Mar'in, I. - Solnyshkin, A. A. - Suchopár, M. - Svoboda, J. - Svoboda, Ondřej - Tyutyunnikov, S. I. - Vrzalová, Jitka - Wagner, Vladimír - Závorka, L. - Zeman, M.
Monitoring mixed neutron-proton field near the primary proton and deuteron beams in spallation targets.
Indian Journal of Pure & Applied Physics. Roč. 58, č. 4 (2020), s. 282-293. ISSN 0019-5596. E-ISSN 0975-1041
Institutional support: RVO:61389005
Keywords : Accelerator-driven systems (ADS) * Subcritical assembly * Neutron flux * Monte Carlo * Activation technique * High-energy beam * Phasotron * Nuclotron
OECD category: Nuclear physics
Impact factor: 0.923, year: 2020
Method of publishing: Limited access
http://nopr.niscair.res.in/handle/123456789/54496

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 Bi-209, Co-59, and Pb-nat. 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.
Permanent Link: http://hdl.handle.net/11104/0309656