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Design of the third-generation lead-based neutron spallation target for the neutron time-of-flight facility at CERN

Esposito, R. ; Calviani, M. ; Aberle, O. ; Barbagallo, M. ; Cano-Ott, D. ; Coiffet, T. ; Colonna, N. ; Domingo-Pardo, C. ; Dragoni, F. ; Franqueira Ximenes, R. ; Giordanino, L. ; Grenier, D. ; Gunsing, F. ; Kershaw, K. ; Logé, R. ; Maire, V. ; Moyret, P. ; Perez Fontenla, A. ; Perillo-Marcone, A. ; Pozzi, F. ; Sgobba, S. ; Timmins, M. ; Vlachoudis, V.

Phys.Rev.Accel.Beams, 2021-09, Vol.24 (9), Article 093001 [Periódico revisado por pares]

College Park: American Physical Society

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Título:
Design of the third-generation lead-based neutron spallation target for the neutron time-of-flight facility at CERN
Autor: Esposito, R. ; Calviani, M. ; Aberle, O. ; Barbagallo, M. ; Cano-Ott, D. ; Coiffet, T. ; Colonna, N. ; Domingo-Pardo, C. ; Dragoni, F. ; Franqueira Ximenes, R. ; Giordanino, L. ; Grenier, D. ; Gunsing, F. ; Kershaw, K. ; Logé, R. ; Maire, V. ; Moyret, P. ; Perez Fontenla, A. ; Perillo-Marcone, A. ; Pozzi, F. ; Sgobba, S. ; Timmins, M. ; Vlachoudis, V.
Assuntos: Astrophysics ; CERN ; Circuits ; Cooling ; Corrosion products ; Design optimization ; Erosion-corrosion ; Instrumentation and Detectors ; Medical research ; Nuclear astrophysics ; Particle physics ; Physics ; Proton beams ; Radiation protection ; Shutdowns ; Spallation ; Vertical flight
É parte de: Phys.Rev.Accel.Beams, 2021-09, Vol.24 (9), Article 093001
Notas: correction
Descrição: The neutron time-of-flight (n_TOF) facility at the European Laboratory for Particle Physics (CERN) is a pulsed white-spectrum neutron spallation source producing neutrons for two experimental areas: the Experimental Area 1 (EAR1), located 185 m horizontally from the target, and the Experimental Area 2 (EAR2), located 20 m above the target. The target, based on pure lead, is impacted by a high-intensity20−GeV/cpulsed proton beam. The facility was conceived to study neutron-nucleus interactions for neutron kinetic energies between a few meV to several GeV, with applications of interest for nuclear astrophysics, nuclear technology, and medical research. After the second-generation target reached the end of its lifetime, the facility underwent a major upgrade during CERN’s Long Shutdown 2 (LS2, 2019–2021), which included the installation of the new third-generation neutron target. The first- and second-generation targets were based on water-cooled massive lead blocks and were designed focusing on EAR1, since EAR2 was built later. The new target is cooled by nitrogen gas to avoid erosion-corrosion and contamination of cooling water with radioactive lead spallation products. Moreover, the new design is optimized also for the vertical flight path and EAR2. This paper presents an overview of the target design focused on both physics and thermomechanical performance, and includes a description of the nitrogen cooling circuit and radiation protection studies.
Editor: College Park: American Physical Society
Idioma: Inglês

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Design of the third-generation lead-based neutron spallation target for the neutron time-of-flight facility at CERN

College Park: American Physical Society

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