Speaker
Description
During the last decades, muography proved to be an excellent method for the non-destructive examination of the internal structure of man-made objects. Muography indirectly provides information about the internal density conditions of the target object. Possible anomalies can be located in two ways: either by triangulation using 2D muograms, or through inversion of the 2D muograms. Inversion yields is a 3D density distribution, however, artifacts may appear due to the geometry of the imaging. In our presentation, we demonstrate that precision parameter estimation is also possible based on muograms, meaning that the parameters describing the target object, such as diameter, direction etc. can be determined with high precision.
The HUN-REN Wigner Research Center for Physics operates an underground laboratory, the Jánossy Underground Laboratory (JURLab). It has a well-defined geometry, and measurements can be performed in multiple tunnels at three levels: -10 m, -20 m, and -30 m. These features make it an excellent location for detector testing. Here, we conducted a measurement series lasting more than two years using multiple detectors across all tunnels.
Our goal was to create a data system that could serve as a basis for testing data processing steps and for testing inversion method in various ways. Furthermore, with the help of well-defined tunnels and surface buildings, it became possible to examine the sensitivity of the method and to conduct precision parameter analyses.
The presentation will discuss the steps of data processing, the sensitivity analysis of the parameters, the determination of parameters for diameter and direction in the case of well-defined tunnels, and the determination of wall thickness in the case of surface structures.