Non-destructive estimation method on cosmic ray ruggedness of power semiconductors using repetitive monitoring technique

2018 ◽  
Vol 88-90 ◽  
pp. 957-960
Author(s):  
C. Kawahara ◽  
Y. Wada ◽  
S. Kinouchi ◽  
H. Kobayashi
Keyword(s):  
Estimation Method ◽  
Cosmic Ray ◽  
Power Semiconductors ◽  
Monitoring Technique ◽  
Non Destructive

scholarly journals Estimating the age and mechanism of boulder transport related with extreme waves using lichenometry

2020 ◽  
Vol 44 (6) ◽  
pp. 870-897
Author(s):  
Maria A Oliveira ◽  
Esteve Llop ◽  
César Andrade ◽  
Cristina Branquinho ◽  
Ronald Goble ◽  
...  
Keyword(s):  
Age Estimation ◽  
Alternative Explanation ◽  
Estimation Method ◽  
Cost Effective ◽  
Optically Stimulated Luminescence ◽  
Extreme Waves ◽  
Non Destructive ◽  
Boulder Deposits ◽  
Lichen Growth

Tsunamis and storms cause considerable coastal flooding, numerous fatalities, destruction of structures, and erosion. The characterization of energy and frequency associated with each wave contribute to the risk assessment in coastal regions. Coastal boulder deposits represent a physical proof of extreme inundation and allow us to study the effects of marine floods further back in time than instrumental and historical records. Age estimation of these deposits is challenging due to lack of materials (such as sand, shells, corals, or organic matter) that retain information about the passage of time. Lichenometry, a simple age estimation method, which is cost-effective, quick to apply, and non-destructive, is here proposed as a solution. A lichen growth model for a calcium-tolerant lichen species was developed and used to estimate the age of a boulder deposit related to extreme marine inundation(s) in Portugal. Estimated ages indicate several very recent events (<700 years) for most of the boulders’ stabilization and agree with results obtained with optically stimulated luminescence of marine sands found beneath boulders. Frequent and recent boulder transport implies a storm-origin for this deposit. These conclusions contrast with other works describing identical deposits that are attributed to paleotsunamis. This study presents a methodology using lichenometry as a successful alternative for age estimation in rocky coastal settings. These results offer an alternative explanation for coastal boulder deposits found on the west coast of Portugal.

Non-Destructive and Contactless Monitoring Technique of Si Surface Stress by Photoreflectance

2000 ◽  
Author(s):  
Masayuki Sougawa ◽  
Takeshi Kanashima ◽  
Masashi Agata ◽  
Kaoru Yamashita ◽  
Masanori Okuyama ◽  
...  
Keyword(s):  
Surface Stress ◽  
Monitoring Technique ◽  
Non Destructive

scholarly journals Development of stroboscopic muography

2012 ◽  
Vol 2 (2) ◽  
pp. 671-684 ◽  
Author(s):  
H. K. M. Tanaka
Keyword(s):  
Detection System ◽  
Cosmic Ray ◽  
Melting Process ◽  
High Time Resolution ◽  
Magma Flow ◽  
Muon Radiography ◽  
Stationary Objects ◽  
Future Potential ◽  
Dynamic Target ◽  
Non Destructive

Abstract. Conventional muon radiography has concentrated on non-destructive studies of stationary objects with relatively long exposure times required to achieve sufficient muon statistics. A muon detection system with real time readings and a high spatial resolution detector, enables the investigation of dynamic processes in a stroboscopic mode, where image frames are synchronized with the phases of the dynamic target. Although the natural cosmic-ray muon flux is quite low for imaging a rapid process, repetitive processes can still be studied with high time resolution by integrating a large number of frames synchronized to the process. In this paper we demonstrate the stroboscopic imaging capabilities of cosmic-ray muon radiography with scintillation counters and the muon readout module. The dynamics of a chemical and melting process in an electric furnace with a size of 30 m water equivalent in diameter was investigated as an example, and stroboscopic images were obtained for hourly changes, with acquisition frames of 400 h each. The results of these experiments demonstrate the future potential for muon radiography of repetional process, such as magma flow in a conduit.

scholarly journals Non-destructive testing of industrial equipment using muon radiography

2018 ◽  
Vol 377 (2137) ◽  
pp. 20180054
Author(s):  
Pablo Martinez Ruiz-del Arbol ◽  
Pablo Gomez Garcia ◽  
Carlos Diez Gonzalez ◽  
Aitor OrioAlonso
Keyword(s):  
Statistical Tests ◽  
Cosmic Ray ◽  
Precise Determination ◽  
Industrial Equipment ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Industrial Facilities ◽  
Term Operation ◽  
Muon Radiography ◽  
Non Destructive

A new application of muon radiography (MR) is presented in the context of non-destructive testing of industrial equipment. The long-term operation of industrial facilities frequently involves the deterioration of critical components such as pipes and cauldrons due to corrosion and other processes. The precise determination of the inner state of this equipment is needed to ensure the integrity of the facility. MR can be used to infer the thickness of these components through the comparison and further classification of muon observables with respect to well-known templates. A simulation example is presented where the thickness of a pipe made of steel is studied using the Point of Closest Approach method and simple Kolmogorov–Smirnov statistical tests. A precision of about 2–4 mm is obtained using a simple detector with a spatial resolution of 4 mm and exposure times of about 2 h. This article is part of the Theo Murphy meeting issue ‘Cosmic-ray muography’.

P-92: Rapid and Non-destructive Lifetime Estimation Method for LED Backlight Displays

2011 ◽  
Vol 42 (1) ◽  
pp. 1448-1450 ◽  
Author(s):  
Su-Yi Lin ◽  
Chi Sheng Chang ◽  
Tony Yang ◽  
Chang Shin Wu ◽  
Chen Cheng Chuan
Keyword(s):  
Estimation Method ◽  
Lifetime Estimation ◽  
Led Backlight ◽  
Non Destructive

scholarly journals Estimation on the Underwater Explosion Equivalent Based on the Threshold Monitoring Technique

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yan Wang ◽  
Xiaoming Wang ◽  
Zhehan Liu ◽  
Wei Tang ◽  
Jian Li ◽  
...  
Keyword(s):  
Real Time ◽  
Estimation Method ◽  
Underwater Explosion ◽  
Measurement Range ◽  
Acoustic Energy ◽  
Pulsation Period ◽  
Nuclear Explosions ◽  
Monitoring Technique ◽  
Bubble Pulsation ◽  
Threshold Monitoring

Underwater nuclear explosions can be monitored in near real-time by the hydroacoustic network of the International Monitoring System (IMS) established by the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which could also be used to monitor underground and atmospheric nuclear explosions. The equivalent is an important parameter for the nuclear explosions’ monitoring. The traditional equivalent estimation method is to calculate the bubble pulsation period, which is difficult to obtain satisfactory results under the current conditions. In this paper, based on the passive sonar equation and the conversion process of acoustic energy parameters in the hydroacoustic station, the threshold monitoring technique used for underwater explosion equivalent estimation was studied, which was not limited to the measurement conditions and calculation results of the bubble pulsation period. Through the analysis of practical monitoring data, estimation on the underwater explosion equivalent based on the threshold monitoring technique was verified to be able to reach the accuracy upper boundary of current methods and expand the measurement range to further ocean space, along with the real-time monitoring capability of IMS hydroacoustic stations which could be estimated by this method.

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