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Title: Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC

Abstract

We developed an ultrasonic longitudinal field time-reversal and MUltiple SIgnal Classification (MUSIC) based detection algorithm for identifying and mapping flaws in fused silica NIF optics. The algorithm requires a fully multistatic data set, that is one with multiple, independently operated, spatially diverse transducers, each transmitter of which, in succession, launches a pulse into the optic and the scattered signal measured and recorded at every receiver. We have successfully localized engineered ''defects'' larger than 1 mm in an optic. We confirmed detection and localization of 3 mm and 5 mm features in experimental data, and a 0.5 mm in simulated data with sufficiently high signal-to-noise ratio. We present the theory, experimental results, and simulated results.

Authors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899101
Report Number(s):
UCRL-TR-219349
TRN: US200713%%176
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ACOUSTICS; ALGORITHMS; CLASSIFICATION; DEFECTS; DETECTION; OPTICS; SIGNAL-TO-NOISE RATIO; SILICA; TRANSDUCERS; ULTRASONIC WAVES

Citation Formats

Lehman, S K. Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC. United States: N. p., 2006. Web. doi:10.2172/899101.
Lehman, S K. Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC. United States. doi:10.2172/899101.
Lehman, S K. Thu . "Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC". United States. doi:10.2172/899101. https://www.osti.gov/servlets/purl/899101.
@article{osti_899101,
title = {Acoustic Longitudinal Field NIF Optic Feature Detection Map Using Time-Reversal & MUSIC},
author = {Lehman, S K},
abstractNote = {We developed an ultrasonic longitudinal field time-reversal and MUltiple SIgnal Classification (MUSIC) based detection algorithm for identifying and mapping flaws in fused silica NIF optics. The algorithm requires a fully multistatic data set, that is one with multiple, independently operated, spatially diverse transducers, each transmitter of which, in succession, launches a pulse into the optic and the scattered signal measured and recorded at every receiver. We have successfully localized engineered ''defects'' larger than 1 mm in an optic. We confirmed detection and localization of 3 mm and 5 mm features in experimental data, and a 0.5 mm in simulated data with sufficiently high signal-to-noise ratio. We present the theory, experimental results, and simulated results.},
doi = {10.2172/899101},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 09 00:00:00 EST 2006},
month = {Thu Feb 09 00:00:00 EST 2006}
}

Technical Report:

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