Open Access

Jorge Lerendegui-Marco, Miguel Antonio Cortés-Giraldo, Carlos Guerrero Sánchez, José Manuel Quesada Molina, Sergio Lo Meo, Cristian Massimi, Massimo Barbagallo, Nicola Colonna, Davide Mancusi, Federica Mingrone, Marta Sabaté-Gilarte, Gianni Vannini, Vasilis Vlachoudis, Oliver Aberle, Józef Andrzejewski, Laurent Audouin, Michael Bacak, Javier Balibrea Correa, František Bečvář, Eric Berthoumieux, Jonathan Billowes, Damir Bosnar, Adam Brown, Manuel Caamaño, Francisco Calviño Tavares, Marco Calviani, Daniel Cano-Ott, Roberto Cardella, Adrià Casanovas Hoste, Francesco Cerutti, Yonghao Chen, Enrico Chiaveri, Guillem Pere Cortés Rossell, Luigi Cosentino, Lucia Anna Damone, Maria Diakaki, César Domingo-Pardo, Rugard Dressler, Emmeric Dupont, Ignacio Durán, Beatriz Fernández Domínguez, Alfredo Ferrari, Pedro G. Ferreira, Paolo Finocchiaro, Kathrin Göbel, María Belén Gómez Hornillos, Aczel Regino García Ríos, Aleksandra Gawlik, Simone Gilardoni, Tudor Glodariu, Isabel Maria Ferro Gonçalves, Enrique Miguel González Romero, Erich Griesmayer, Frank Gunsing, Hideo Harada, Stephan Heinitz, Jan Heyse, David Jenkins, Erwin Jericha, Franz Käppeler, Yacine Kadi, Antigoni Kalamara, Pavel Kavrigin, Atsushi Kimura, Nikolay Kivel, Michael Kokkoris, Milan Krtička, Cem Deniz Kurtulgil, Esther Leal Cidoncha, Claudia Lederer, Helmut Leeb, Sarah Jane Lonsdale, Daniela Macina, Justyna Marganiec, Trinitario Martı́nez, Alessandro Masi, Pierfrancesco Mastinu, Mario Mastromarco, Emilio Andrea Maugeri, Annamaria Mazzone, Emilio Mendoza Cembranos, Alberto Mengoni, Paolo Maria Milazzo, Agatino Musumarra, Alexandru Negret, Ralf Nolte, Andreea Oprea, Nikolas Patronis, Andreas Pavlik, Jarosław Perkowski, José Ignacio Porras Sánchez, Javier Praena, Désirée Radeck, Thomas Rauscher, René Reifarth, Prakash Chandra Rout, Carlo Rubbia, James A. Ryan, Alok Saxena, Peter Schillebeeckx, Dorothea Schumann, Alastair Gavin Smith, Nikolay V. Sosnin, Athanasios Stamatopoulos, Giuseppe Tagliente, José Luis Taı́n Enríquez, Ariel Tarifeño-Saldivia, Laurent Tassan-Got, Stanislav Valenta, Vincenzo Variale, Pedro Vaz, Alberto Ventura, Rosa Vlastou, Anton Wallner, Stephen J. Warren, Philip John Woods, Tobias Wright, Petar Žugec

• Monte Carlo (MC) simulations are an essential tool to determine fundamental features of a neutron beam, such as the neutron flux or the γ-ray background, that sometimes can not be measured or at least not in every position or energy range. Until recently, the most widely used MC codes in this field had been MCNPX and FLUKA. However, the Geant4 toolkit has also become a competitive code for the transport of neutrons after the development of the native Geant4 format for neutron data libraries, G4NDL. In this context, we present the Geant4 simulations of the neutron spallation target of the n_TOF facility at CERN, done with version 10.1.1 of the toolkit. The first goal was the validation of the intra-nuclear cascade models implemented in the code using, as benchmark, the characteristics of the neutron beam measured at the first experimental area (EAR1), especially the neutron flux and energy distribution, and the time distribution of neutrons of equal kinetic energy, the so-called Resolution Function. The second goal was the development of a Monte Carlo tool aimed to provide useful calculations for both the analysis and planning of the upcoming measurements at the new experimental area (EAR2) of the facility.