Characterization of multilayer Thick-GEM geometries as 10B converters aiming thermal neutron detection
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Boron-based thermal neutron detectors have recently regained some attention from the instrumentation community as a strong alternative to helium-3 detectors. From the existing concepts exploiting boron layers in position sensitive detectors, the Cascade [1] is the one that takes full advantage of the 2D capabilities of gaseous detectors, with the position resolution not limited by the architecture of the detector. In this work, a proposal for the Cascade detector, based on Thick-GEMs is presented, together with some preliminary studies of the suitable pitch that optimizes the neutron conversion efficiency, while keeping the collection efficiency intact. The characterization of Thick-GEM prototypes produced in Brazil with hole pitch from 0.75 to 3 mm shows that these devices already present a stable performance at low gains, also resulting in fair energy resolution, when cascaded with a standard KaptonTM 50 µm GEM. Results of the first attempts of boron film depositions with Ion Beam Assisted Deposition and characterization by Ion Beam Analysis are also presented.
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LUZ, H.N. da; SOUZA, F.A.; MORALLES, M.; CARLIN, N.; OLIVEIRA, R.A.N.; BREGANT, M.; SUAIDE, A.A.P.; CHUBACI, J.F.D.; MATSUOKA, M.; SILVA, T.F.; MORO, M.V.; RODRIGUES, C.L.; MUNHOZ, M.G. Characterization of multilayer Thick-GEM geometries as 10B converters aiming thermal neutron detection. EPJ Web of Conferences, v. 174, p. 1-4, 2018. DOI: 10.1051/epjconf/201817401012. Disponível em: http://repositorio.ipen.br/handle/123456789/29429. Acesso em: 20 Mar 2026.
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