Space and power effective readout system for cosmic-ray muon radiography

To overcome limitations on power-source availability and observation-site access, a cosmic-ray muon-radiography detection system with an Ethernet port and low power consumption was developed. The system consists of a small solar-power supply and a wireless LAN. It provides a real-time angular distribution of muons in real time as a histogram on a web browser. The developed detection system was used to measure the density profile of a volcano as an angular distribution of cosmic-ray muons penetrating through the volcano. The obtained clear image of the volcano indicates that the performance of the detection system is sufficient for cosmicray muon radiography.