High-definition and low-noise muography of the Sakurajima volcano with gaseous tracking detectors

Muography is a novel method to highly resolve the internal structure of active volcanoes by taking advantage of the cosmic muon’s strong penetration power. In this paper, we present the first high-definition image in the vicinity of craters of an erupting volcano called Sakurajima, Kyushu, Japan. Th...

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Bibliographic Details
Published in:Scientific reports 2018-02, Vol.8 (1), p.3207-13, Article 3207
Main Authors: Oláh, László, Tanaka, Hiroyuki K. M., Ohminato, Takao, Varga, Dezső
Format: Article
Language:English
Subjects:
639/766/419/1131
704/4111
Cosmic rays
Humanities and Social Sciences
Magma
multidisciplinary
Noise
Radiation
Science
Science (multidisciplinary)
Sensors
Volcanoes
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Summary:Muography is a novel method to highly resolve the internal structure of active volcanoes by taking advantage of the cosmic muon’s strong penetration power. In this paper, we present the first high-definition image in the vicinity of craters of an erupting volcano called Sakurajima, Kyushu, Japan. The muography observation system based on the technique of multi-wire proportional chamber (mMOS) has been operated reliably during the data taking period of 157 days. The mMOS measured precisely the flux of muons up to the thickness of 5,000 meter-water-equivalent. It was shown that high-definition density maps around the Craters A, B and Showa could be determined with a precision of less than 7.5 × 7.5 m 2 which earlier had not yet been achieved. The observed density distribution suggests that the fall back deposits filled the magma pathway and increased their density underneath Craters A and B.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-21423-9