Cosmic-ray%20muon%20radiography%20of%20volcanoes%20with%20emulsion%20cloud%20chambers

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Cosmic-ray muon radiography of volcanoes with
emulsion cloud chambers

• Hiroyuki Tanaka
• ERI
• University of Tokyo

The 3rd International Workshop on Nuclear
Emulsion Techniques - Modern techniques of
nuclear emulsion and their applications -
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Principle
muon
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Why Muon?
muon
p
g
electron
proton
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electron
muon
proton
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Why ECC?
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Why Radiography?
Seismic
Magnetoteluric
Gravimetric
Geodetic
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Type of Volcano

• Vulcanian
• Mt. Asama
• Dome
• Mt. Usu

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Mt. Asama
Mt. Asama
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Result in Asama
ECC Muon Detector
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Mt. Usu
Mt. Usu
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Result in Usu
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Geodetic Model of Usu
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Yokoyama 2002
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Other type of volcanoes

• Strombolian
• Satsuma Iwojima

Gas of 16000 t/day
degassing
convection
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Satsuma Iwojima (future observation)
ECC
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Future Prospects

• 3d tomography
• real time monitoring
• faster scanning system

ECC
ECC
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Summary

• Portable
• Power free
• Simple
• High resolution

Acknowledgements K. Niwa, T. Nakano, S.
Takahashi, J. Yoshida, Nagoya University Universi
ty of Tokyo Hokkaido University