The Monte Carlo simulation of the Borexino detector
M. Agostini, K. Altenmuller, S. Appel, V. Atroshchenko, Z., Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, G. Bonfini, L., Borodikhina, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, S. Caprioli,, M. Carlini, P. Cavalcante, A. Chepurnov, K. Choi, D. D'Angelo
TL;DR
This paper details a comprehensive Monte Carlo simulation of the Borexino detector, accurately modeling particle interactions, photon propagation, and electronics response, with results closely matching experimental data.
Contribution
It presents a detailed 'ab initio' Monte Carlo simulation framework for Borexino, including optical photon tracking and electronics modeling, tailored for large-volume liquid scintillator detectors.
Findings
Simulation reproduces energy response within 1% accuracy
Achieves uniformity in the fiducial volume for neutrino detection
Models photon timing distribution with high precision
Abstract
We describe the Monte Carlo (MC) simulation package of the Borexino detector and discuss the agreement of its output with data. The Borexino MC 'ab initio' simulates the energy loss of particles in all detector components and generates the resulting scintillation photons and their propagation within the liquid scintillator volume. The simulation accounts for absorption, reemission, and scattering of the optical photons and tracks them until they either are absorbed or reach the photocathode of one of the photomultiplier tubes. Photon detection is followed by a comprehensive simulation of the readout electronics response. The algorithm proceeds with a detailed simulation of the electronics chain. The MC is tuned using data collected with radioactive calibration sources deployed inside and around the scintillator volume. The simulation reproduces the energy response of the detector, its…
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