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KATOVSKÝ, K. ADAM, J. VARMUŽA, J.
Original Title
Accelerator driven subcritical system neutron spectra determination issues
Type
abstract
Language
English
Original Abstract
Accelerator Driven Subcritical Systems are reactors with very complex neutron spectra very much depending on primary accelerated particle induced neutron source reaction. The most powerful neutron source for ADSS applications is a spallation reaction of heavy target (Pb, Bi, U) and light ion beam (proton, deuteron, or light ion with energy of several hundreds MeV up to several GeV per nucleon). According to development of spallation neutron sources around the world (SNS, ESS, JSNS, CSNS) determination and simulation of total number of neutrons is quite well developed, however, very fast group of neutron spectra might be systematically underestimated, Nevertheless, cross-section data for this energy group have significant 'white spots', what together with incorrect group-wise spectral flux density determination might cause important reaction rates discrepancies. Conventional fast neutron detection methods, like ToF, Bonner spheres, or proton recoil, are very hard to use, or their utilization is limited just to experimental channels. Methodology of using special alloy as threshold activation detectors shielded with various spectral filters to provide as Inuch as possible information for signal deconvolution and final spectra unfolding. Method is standard enough and sufficiently robust to be use in synergy with other more challenging methods like delayed neutron fraction method or modern methods based on semiconductor pixel or strip detectors. Method can be used and validated on fusion devices, as well as cyclotron based neutron generators and powerful photoneutron sources based on microtron accelerators.
Keywords
ADS; Accelerator Driven Systems; Neutron Spectrum; Spallation; Transmutation
Authors
KATOVSKÝ, K.; ADAM, J.; VARMUŽA, J.
Released
10. 10. 2017
Publisher
Physics Department, The Maharaja Sayajirao University of Baroda
Location
Vadodara, India
Pages from
37
Pages to
38
Pages count
2
BibTex
@misc{BUT165124, author="Karel {Katovský} and Jindřich {Adam} and Jan {Varmuža}", title="Accelerator driven subcritical system neutron spectra determination issues", booktitle="Proceedings of the ICHERA-2017: international conference on high energy radiation and applications; Vadodara (India); 10-13 Oct 2017", year="2017", series="1", edition="1", pages="37--38", publisher="Physics Department, The Maharaja Sayajirao University of Baroda", address="Vadodara, India", note="abstract" }