A simple particle detection system comprising an emulsion cloud chamber was developed as a potential apparatus for cosmic-ray muon radiography of a volcano. A successful radiographic measurement of the internal structure of Mt. Kama-yama through Mt. Maekake-yama is described. We analyzed the data and the bulk density of 2.25 ±0 . 040 . 06 g cm-3 was determined in Kama-yama. Using the value of the density of the mountain, we confirmed that the volume occupancy in the shallow region of a crater (at a place between the crater rim and 100 m below the rim) is 8 . 1- 8.1+ 45.9%. We discuss the future perspective of the power-free radiographic imaging device for understanding and monitoring volcanic activity.
|Number of pages||9|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 2007 Jun 1|
- Cosmic-ray muon
- Emulsion cloud chamber
ASJC Scopus subject areas
- Nuclear and High Energy Physics