Cosmic-ray muon radiography of volcanoes with emulsion cloud chambers

Hiroyuki TanakaERIUniversity of Tokyo

The 3rd International Workshop on Nuclear Emulsion Techniques 　－ Modern techniques of nuclear emulsion and their applications －

Principle

muon

Why Muon?

pg

electron

proton

muon

electron

muon

proton

Why ECC?

Why Radiography?

Seismic Magnetoteluric

GeodeticGravimetric

Type of Volcano

VulcanianMt. Asama

DomeMt. Usu

Mt. Asama

Mt. Asama

Result in Asama

ECC Muon Detector

Mt. Usu

Mt. Usu

Result in Usu

Geodetic Model of Usu

Yokoyama 2002

Other type of volcanoes

Strombolian Satsuma Iwojima

convection

degassing

Gas of 16000 t/day

Satsuma Iwojima (future observation)

ECC

Future Prospects

３ d tomography

real time monitoring faster scanning system

ECC

ECC

Summary

Portable Power free Simple High resolution

Acknowledgements:K. Niwa, T. Nakano, S. Takahashi, J. Yoshida, Nagoya UniversityUniversity of TokyoHokkaido University