Abstract
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.
Highlights
Recent technological advances in cosmic-ray muon radiography (Nagamine et al, 1996) has enabled scientists to better determine the internal structure of a volcano
Since commercial power is supplied to this station, we did not employ a solar power system for this observation
A histogram of the angular distribution of cosmic-ray muons is generated on the board
Summary
Recent technological advances in cosmic-ray muon radiography (Nagamine et al, 1996) has enabled scientists to better determine the internal structure of a volcano. The detector part detects the cosmic-ray muons using two position-sensitive counters. The readout system processes signals from the counters and generates a histogram for an angular distribution. The readout board processes the signals from the detector, generates a histogram as a web page, and works as a web server.
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