Physics – Geophysics
Scientific paper
2010-05-02
Physics
Geophysics
7 pages, 7 figures - This paper aimed at describing time reversal mirror method applied at mesoscopic scale to a natural mediu
Scientific paper
A seismic time reversal experiment based on Time Reversal Mirror (TRM) technique was conducted in the mesoscopically scaled medium at the LSBB Laboratory, France. Two sets of 50 Hz geophones were distributed at one meter intervals in two horizontal and parallel galleries 100 m apart, buried 250 m below the surface. The shot source used was a 4 kg sledgehammer. Analysis shows that elastic seismic energy is refocused in space and time to the shot locations with good accuracy. The refocusing ability of seismic energy to the shot locations is roughly achieved for the direct field, and with excellent quality, for the early and later coda. Hyper-focussing is achieved at the shot points as a consequence of the fine scale randomly heterogeneous medium between the galleries. TRM experiment is sensitive to the roughness of the mirror used. Roughness induces a slight experimental discrepancy between recording and re-emitting directions degrading the quality of the reversal process.
Auguste Michel
Boyer Daniel
Cavaillou Alain
Gaffet Stephane
Monfret Tony
No associations
LandOfFree
Elastic Time Reversal Mirror Experiment in a Mesoscopic Natural Medium at the Low Noise Underground Laboratory of Rustrel, France 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 Elastic Time Reversal Mirror Experiment in a Mesoscopic Natural Medium at the Low Noise Underground Laboratory of Rustrel, France, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastic Time Reversal Mirror Experiment in a Mesoscopic Natural Medium at the Low Noise Underground Laboratory of Rustrel, France will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-723924