TY - JOUR
T1 - Conceptual design of a hybrid neutron-gamma detector for study of β-delayed neutrons at the RIB facility of RIKEN
AU - Tarifeño-Saldivia, A.
AU - Tain, J. L.
AU - Domingo-Pardo, C.
AU - Calviño, F.
AU - Cortés, G.
AU - Phong, V. H.
AU - Riego, A.
AU - Agramunt, J.
AU - Algora, A.
AU - Brewer, N.
AU - Caballero-Folch, R.
AU - Coleman-Smith, P. J.
AU - Davinson, T.
AU - Dillmann, I.
AU - Estradé, A.
AU - Griffin, C. J.
AU - Grzywacz, R.
AU - Harkness-Brennan, L. J.
AU - Kiss, G. G.
AU - Kogimtzis, M.
AU - Labiche, M.
AU - Lazarus, I. H.
AU - Lorusso, G.
AU - Matsui, K.
AU - Miernik, K.
AU - Montes, F.
AU - Morales, A. I.
AU - Nishimura, S.
AU - Page, R. D.
AU - Podolyák, Z. S.
AU - Pucknell, V. F.E.
AU - Rasco, B. C.
AU - Regan, P.
AU - Rubio, B.
AU - Rykaczewski, K. P.
AU - Saito, Y.
AU - Sakurai, H.
AU - Simpson, J.
AU - Sokol, E.
AU - Surman, R.
AU - Svirkhin, A.
AU - Thomas, S. L.
AU - Tolosa, A.
AU - Woods, P.
N1 - Publisher Copyright:
© 2017 IOP Publishing Ltd and Sissa Medialab srl.
PY - 2017/4/7
Y1 - 2017/4/7
N2 - The conceptual design of the BRIKEN neutron detector at the radioactive ion beam factory (RIBF) of the RIKEN Nishina Center is reported. The BRIKEN setup is a complex system aimed at detecting heavy-ion implants, β particles, γ rays and β-delayed neutrons. The whole setup includes the Advanced Implantation Detection Array (AIDA), two HPGe Clover detectors and up to 166 3He-filled counters embedded in a high-density polyethylene moderator. The design is quite complex due to the large number and different types of 3He-tubes involved and the additional constraints introduced by the ancillary detectors for charged particles and γ rays. This article reports on a novel methodology developed for the conceptual design and optimisation of the 3He-counter array, aiming for the best possible performance in terms of neutron detection. The algorithm is based on a geometric representation of two selected detector parameters of merit, namely, the average neutron detection efficiency and the efficiency flatness as a function of a reduced number of geometric variables. The response of the neutron detector is obtained from a systematic Monte Carlo simulation implemented in GEANT4. The robustness of the algorithm allowed us to design a versatile detection system, which operated in hybrid mode includes the full neutron counter and two clover detectors for high-precision gamma spectroscopy. In addition, the system can be reconfigured into a compact mode by removing the clover detectors and re-arranging the 3He tubes in order to maximize the neutron detection performance. Both operation modes shows a rather flat and high average efficiency. In summary, we have designed a system which shows an average efficiency for hybrid mode (3He tubes + clovers) of 68.6% and 64% for neutron energies up to 1 and 5 MeV, respectively. For compact mode (only 3He tubes), the average efficiency is 75.7% and 71% for neutron energies up to 1 and 5 MeV, respectively. The performance of the BRIKEN detection system has been also quantified by means of Monte Carlo simulations with different neutron energy distributions.
AB - The conceptual design of the BRIKEN neutron detector at the radioactive ion beam factory (RIBF) of the RIKEN Nishina Center is reported. The BRIKEN setup is a complex system aimed at detecting heavy-ion implants, β particles, γ rays and β-delayed neutrons. The whole setup includes the Advanced Implantation Detection Array (AIDA), two HPGe Clover detectors and up to 166 3He-filled counters embedded in a high-density polyethylene moderator. The design is quite complex due to the large number and different types of 3He-tubes involved and the additional constraints introduced by the ancillary detectors for charged particles and γ rays. This article reports on a novel methodology developed for the conceptual design and optimisation of the 3He-counter array, aiming for the best possible performance in terms of neutron detection. The algorithm is based on a geometric representation of two selected detector parameters of merit, namely, the average neutron detection efficiency and the efficiency flatness as a function of a reduced number of geometric variables. The response of the neutron detector is obtained from a systematic Monte Carlo simulation implemented in GEANT4. The robustness of the algorithm allowed us to design a versatile detection system, which operated in hybrid mode includes the full neutron counter and two clover detectors for high-precision gamma spectroscopy. In addition, the system can be reconfigured into a compact mode by removing the clover detectors and re-arranging the 3He tubes in order to maximize the neutron detection performance. Both operation modes shows a rather flat and high average efficiency. In summary, we have designed a system which shows an average efficiency for hybrid mode (3He tubes + clovers) of 68.6% and 64% for neutron energies up to 1 and 5 MeV, respectively. For compact mode (only 3He tubes), the average efficiency is 75.7% and 71% for neutron energies up to 1 and 5 MeV, respectively. The performance of the BRIKEN detection system has been also quantified by means of Monte Carlo simulations with different neutron energy distributions.
KW - Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)
KW - Instrumentation for radioactive beams (fragmentation devices
KW - Neutron detectors (cold, thermal, fast neutrons)
KW - fragment and isotope, separators incl. ISOL
KW - ion and atom traps
KW - isobar separators
KW - radioactive-beam ion sources)
KW - weak-beam diagnostics
UR - https://www.scopus.com/pages/publications/85019421220
U2 - 10.1088/1748-0221/12/04/P04006
DO - 10.1088/1748-0221/12/04/P04006
M3 - Article
AN - SCOPUS:85019421220
SN - 1748-0221
VL - 12
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 4
M1 - P04006
ER -