Development of Mudulus: A Muography Detector Based on Double-Synchronized Electronics for Geophysical Applications

CALDERÓN-ARDILA, ROLANDO; ASOREY, HERNÁN; ALMELA, ALEJANDRO; SEDOSKI, ADRIAN; VARELA, CARLOS; LEAL, NICOLÁS; GÓMEZ-BERISSO, MARIANO

JOURNAL FOR ADVANCED INSTRUMENTATION IN SCIENCE

International Workshop on Cosmic-Ray Muography (Muography2021)

Lugar: GHENT; Año: 2022 vol. 2022

In this paper, we present a prototype modular muon detector (“Mudulus”), based on our previous experi-ence with the design of the MuTe detector in Colombia and the AMIGA buried muon detectors in the PierreAuger Collaboration. Our group is developing detectors for muography and multipurpose applications.Our prototype detectors use different modules of plastic scintillators with embedded optical fibers and 64channel multianode photomultiplier tubes (PMTs) with a common dynode or arrays of Silicon Photomul-tipliers (SiPM). In the case of Mudulus, each module is made of 12 scintillator strips of ( 4 × 1 × 100) cm3coupled with a lengthwise running Wavelength Shifter (WLS) fiber, connected at each end to a PMT chan-nel. This design allows us to build panels with up to four of these modules. This modular configurationallows changing the panel geometries looking for an adaptive shape or size to the studied object and result-ing in a detailed muography image. The improvement in performance obtained with Mudulus is achievedby the combination of its modular design and the double-synchronized detection at the end of each scin-tillator bar. We take advantage of measuring at both ends of each strip to determine the muon flux usinga model to account for signal attenuation in each anode, and then determine the position of the incomingmuons with better discrimination and subpixel spatial resolution.