摘要：Cosmic-ray muon radiography is a method that is used to study the internal structure of volcanoes.We have developed a muon radiographic imaging board with a power consumption low enough to be powered by a small solar power system.The imaging board generates an angular distribution of the muons.Used for realtime reading, the method may facilitate the prediction of eruptions.For real-time observations, the Ethernet is employed, and the board works as a web server for a remote operation.The angular distribution can be obtained from a remote PC via a network using a standard web browser.We have collected and analyzed data obtained from a 3-day field study of cosmic-ray muons at a Satsuma-Iwojima volcano.The data provided a clear image of the mountain ridge as a cosmic-ray muon shadow.The measured performance of the system is sufficient for a stand-alone cosmic-ray muon radiography experiment.
