Detalle de: Application and performance of an ML-EM algorithm in NEXT
| Title | Application and performance of an ML-EM algorithm in NEXT |
| Abstract |
The goal of the NEXT experiment is the observation of neutrinoless double beta decay in 136 Xe using a gaseous xenon TPC with electroluminescent amplification and specialized photodetector arrays for calorimetry and tracking. The NEXT Collaboration is exploring a number of reconstruction algorithms to exploit the full potential of the detector. This paper describes one of them: the Maximum Likelihood Expectation Maximization (ML-EM) method, a generic iterative algorithm to find maximum-likelihood estimates of parameters that has been applied to solve many different types of complex inverse problems. In particular, we discuss a bi-dimensional version of the method in which the photosensor signals integrated over time are used to reconstruct a transverse projection of the event. First results show that, when applied to detector simulation data, the algorithm achieves nearly optimal energy resolution (better than 0.5% FWHM at the Q value of 136 Xe) for events distributed over the full active volume of the TPC. |
| Apa Reference | Simón, A., Lerche, C., Monrabal, F., Gómez-Cadenas, J., Álvarez, V., Azevedo, C., Benlloch-Rodríguez, J., Borges, F., Botas, A., Cárcel, S., Carrión, J., Cebrián, S., Conde, C., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L., Ferrario, P., Ferreira, A., Freitas, E., Goldschmidt, A., González-Díaz, D., Gutiérrez, R., Hauptman, J., Henriques, C., Hernandez, A., Morata, J.H., Herrero, V., Jones, B., Labarga, L., Laing, A., Lebrun, P., Liubarsky, I., López-March, N., Losada, M., Martín-Albo, J., Martínez-Lema, G., Martínez, A., McDonald, A., Monteiro, C., Mora, F., Moutinho, L., Vidal, J.M., Musti, M., Nebot-Guinot, M., Novella, P., Nygren, D., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Ripoll, L., Rodríguez, J., Rogers, L., Santos, F., Santos, J.d., Sofka, C., Sorel, M., Stiegler, T., Toledo, J., Torrent, J., Tsamalaidze, Z., Veloso, J., Webb, R., White, J. & Yahlali, N. (2017). Application and performance of an ML-EM algorithm in NEXT. Journal of Instrumentation, 12(08), P08009-P08009. 10.1088/1748-0221/12/08/P08009 |
| Doi | 10.1088/1748-0221/12/08/P08009 |
| Publication Date | 16 Aug 2017 |
| Publication Type | Article |
| Researcher | José Vicente Carrión Burguete |
| Ontology | Computational models and simulations, Frequentist analysis |
| Research Groups | |
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