TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 62 (No. 2), pp. 167-172, 2010

Development of a muon radiographic imaging electronic board system for a stable solar power operation

Tomohisa Uchida1, Hiroyuki K. M. Tanaka2, and Manobu Tanaka3

1University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2Earthquake Research Institute, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, Japan
3High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan

(Received October 29, 2008; Revised March 23, 2009; Accepted March 28, 2009; Online published February 22, 2010)

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 real-time 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.
Key words: Cosmic-ray muon radiography, imaging system.

Corresponding author E-mail: uchida@post.kek.jp

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