Other
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ep%26s...62..119h&link_type=abstract
Earth, Planets and Space, Volume 62, Issue 2, p. 119-129.
Other
2
Scientific paper
We have developed a portable assembly type cosmic-ray muon telescope system with power-effective real-time readings to monitor the internal structure of a volcano. Using this system, we have performed measurements at the Satsuma-Iojima volcano and studied the feasibility of using a continuous flux of cosmic-ray muons over the observation period. The system is based on the measurement of time-dependent muon absorption along different, nearly horizontal paths through a solid body. The rationale is that one can deduce the time-dependent changes in the density distribution of muon absorption in the interior of the object where an absorption variation, i.e., a density path variation, becomes an intensity variation since the muon energy spectrum is exponential or, expressed otherwise, it drops rapidly when the energy threshold increases. The muon telescope, which has a surface area of 1 m2, was installed at the observation point located 1.2 km from the summit crater of Satsuma-Iojima. Muon tracks within scintillator layers in the telescope were analyzed continuously by real-time three-dimensional image processing to measure the level of absorption along different ray paths through the summit crater region. A typical angular resolution of the muon detector of ±16 mrad corresponds to a spatial resolution of ±20 m at a distance of 1.2 km. Our results show the density structure determined in Satsuma-Iojima volcano, Japan, which is located above sea level. A density structure situated above sea level can be analyzed at a resolution that is significantly higher than is possible with conventional geophysical measurements.
Shinohara Hiroshi
Taira Hajime
Tanaka Hiroyuki K. M.
Tanaka Masao
Uchida Takashi
No associations
LandOfFree
Development of a portable assembly-type cosmic-ray muon module for measuring the density structure of a column of magma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Development of a portable assembly-type cosmic-ray muon module for measuring the density structure of a column of magma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Development of a portable assembly-type cosmic-ray muon module for measuring the density structure of a column of magma will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1090832