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Title

Laboratory and test-beam results with MACACO II

AuthorsBorja-LLoret, P.; Barrientos, L.; Barrio Toala, J.; Bernabéu, José ; Dendooven, P.; García López, J. ; Jiménez-Ramos, M. C. ; Lacasta Llácer, Carlos ; Marco Hernández, Ricardo ; Muñoz, Enrique; Oliver Guillén, José Francisco ; Ozoemelan, I.; Ros García, Ana ; Roser, J.; Senra, C.; Solaz, Carles; Viegas, R.; Llosa, G.
Issue Date30-Oct-2019
CitationIEEE Nuclear Science Symposium and Medical Imaging Conference (2019)
AbstractThe IRIS group at IFIC Valencia is developing a three-layer Compton camera for treatment monitoring in ion beam therapy. The system is composed of three detector planes, each made of a LaBr 3 monolithic crystal coupled to SiPM arrays. The first prototype (MACACO), was fully characterised in the laboratory and in beam tests demonstrating the feasibility of the proposed technology. A second prototype (MACACO II), described in this work, is currently being developed to improve performance. The SiPM arrays have been replaced by newer models, leading to an improved detector energy resolution which translates into a higher spatial resolution of the telescope. In addition, the image reconstruction code has been improved with an accurate model of the sensitivity matrix. Furthermore, a new spectral reconstruction algorithm for Compton cameras with two planes has been developed showing promising results. The system has been fully characterised in the laboratory at controlled temperature and also tested in two accelerator facilities. The first involved a proton beam of 18 MeV impinging a graphite target. The results allowed the successful reconstruction of two target positions separated by 5 mm. The second test beam used protons of 150 MeV impinging on a PMMA target. The results show that for measurements taken in different positions of the PMMA target the reconstructed Bragg peak position is related to the PMMA position.
DescriptionTrabajo presentado en el IEEE Nuclear Science Symposium and Medical Imaging Conference, celebrada en Manchester, del 26 de octubre al 2 de noviembre de 2019
URIhttp://hdl.handle.net/10261/205329
Appears in Collections:(CNA) Comunicaciones congresos
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