TY - GEN
T1 - Towards an improved GELINA neutron target
AU - Flaska, Marek
AU - Borella, Alessandro
AU - Lathouwers, Danny
AU - Mihailescu, Liviu C.
AU - Mondelaers, Willy
AU - Plompen, Arjan J.M.
AU - Van Dam, Hugo
AU - Van Der Hagen, Tim H.J.J.
PY - 2004
Y1 - 2004
N2 - The neutron target of the GELINA time-of-flight facility has been simulated with coupled electron-photon-neutron MCNP4C3 calculations. The main goal is to investigate the feasibility for the reduction of the neutron time spread without significantly compromising the neutron yield. An implementation of new photonuclear libraries into the Monte Carlo calculations was necessary to simulate the neutronics problem accurately. Absolute flux calculations were performed for both moderated and direct neutron spectra in order to validate the geometry model and the method used to deal with the neutronics problem. These results were compared with the measured neutron spectra at specific flight paths; an agreement within 20% was achieved. The resolution functions of the moderated spectrum currently in use were compared with our Monte Carlo simulations; here an excellent agreement was reached. Finally, the simulated resolution functions for the direct neutron spectrum were calculated with and without the presence of the moderator. This comparison illustrates the negative influence of the moderator on the resolution function for the fast neutron spectrum.
AB - The neutron target of the GELINA time-of-flight facility has been simulated with coupled electron-photon-neutron MCNP4C3 calculations. The main goal is to investigate the feasibility for the reduction of the neutron time spread without significantly compromising the neutron yield. An implementation of new photonuclear libraries into the Monte Carlo calculations was necessary to simulate the neutronics problem accurately. Absolute flux calculations were performed for both moderated and direct neutron spectra in order to validate the geometry model and the method used to deal with the neutronics problem. These results were compared with the measured neutron spectra at specific flight paths; an agreement within 20% was achieved. The resolution functions of the moderated spectrum currently in use were compared with our Monte Carlo simulations; here an excellent agreement was reached. Finally, the simulated resolution functions for the direct neutron spectrum were calculated with and without the presence of the moderator. This comparison illustrates the negative influence of the moderator on the resolution function for the fast neutron spectrum.
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M3 - Conference contribution
AN - SCOPUS:22344434084
SN - 0894486837
T3 - Proceedings of the PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
SP - 507
EP - 513
BT - Proceedings of the PHYSOR 2004
T2 - PHYSOR 2004: The Physics of Fuel Cycles and Advanced Nuclear Systems - Global Developments
Y2 - 25 April 2004 through 29 April 2004
ER -