Application and performance of an ML-EM algorithm in NEXT

Autor:	NEXT Collaboration, Simón, A., Lerche, C., Monrabal, F., Gómez-Cadenas, J. J., Álvarez, V., Azevedo, C. D. R., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Botas, A., Cárcel, S., Carrión, J. V., Cebrián, S., Conde, C. A. N., Díaz, J., Diesburg, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Goldschmidt, A., González-Díaz, D., Gutiérrez, R. M., Hauptman, J., Henriques, C. A. O., Hernandez, A. I., Morata, J. A. Hernando, Herrero, V., Jones, B. J. P., Labarga, L., Laing, A., Lebrun, P., Liubarsky, I., López-March, N., Losada, M., Martín-Albo, J., Martínez-Lema, G., Martínez, A., McDonald, A. D., Monteiro, C. M. B., Mora, F. J., Moutinho, L. M., Vidal, J. Muñoz, Musti, M., Nebot-Guinot, M., Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Ripoll, L., Rodríguez, J., Rogers, L., Santos, F. P., Santos, J. M. F. dos, Sofka, C., Sorel, M., Stiegler, T., Toledo, J. F., Torrent, J., Tsamalaidze, Z., Veloso, J. F. C. A., Webb, R., White, J. T., Yahlali, N.
Rok vydání:	2017
Předmět:	Physics - Instrumentation and Detectors High Energy Physics - Experiment
Druh dokumentu:	Working Paper
DOI:	10.1088/1748-0221/12/08/P08009
Popis:	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. Comment: 19 pages, 16 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1705.10270 Zobrazit plný text záznamu View this record from Arxiv