A random matrix approach to detect defects in a strongly scattering polycrystal: how the memory effect can help overcome multiple scattering
📝 Original Info
- Title: A random matrix approach to detect defects in a strongly scattering polycrystal: how the memory effect can help overcome multiple scattering
- ArXiv ID: 1405.6526
- Date: 2015-06-19
- Authors: Researchers from original ArXiv paper
📝 Abstract
We report on ultrasonic imaging in a random heterogeneous medium. The goal is to detect flaws embedded deeply into a polycrystalline material. A 64-element array of piezoelectric transmitters/receivers at a central frequency of 5 MHz is used to capture the Green's matrix in a backscattering configuration. Because of multiple scattering, conventional imaging completely fails to detect the deepest flaws. We utilize a random matrix approach, taking advantage of the deterministic coherence of the backscattered wave-field which is characteristic of single scattering and related to the memory effect. This allows us to separate single and multiple scattering contributions. As a consequence, we show that flaws are detected beyond the conventional limit, as if multiple scattering had been overcome.💡 Deep Analysis
Deep Dive into A random matrix approach to detect defects in a strongly scattering polycrystal: how the memory effect can help overcome multiple scattering.We report on ultrasonic imaging in a random heterogeneous medium. The goal is to detect flaws embedded deeply into a polycrystalline material. A 64-element array of piezoelectric transmitters/receivers at a central frequency of 5 MHz is used to capture the Green’s matrix in a backscattering configuration. Because of multiple scattering, conventional imaging completely fails to detect the deepest flaws. We utilize a random matrix approach, taking advantage of the deterministic coherence of the backscattered wave-field which is characteristic of single scattering and related to the memory effect. This allows us to separate single and multiple scattering contributions. As a consequence, we show that flaws are detected beyond the conventional limit, as if multiple scattering had been overcome.