Energy Dispersive X-Ray Diffraction System as a Promising Virtual Biopsy in Mammography

International audienceX-ray diffraction is a powerful technique to provide information on the molecular structure of samples. Thanks to this property, it has been found to be useful in different fields of applications such as security check and cancer research, especially breast cancer. A diffraction imaging might bemore specific than conventional mammography, especially to distinguish dense healthy fibroglandular tissues from carcinoma.Hence, the idea is to realize a virtual biopsy using Xray diffraction rather than a breast biopsy if mammography outcome is unsure

Indentification of a viscoplastic material behaviour under anisothermal conditions

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A macroscopic crack initiation criterion in multiaxial thermomechanical fatigue

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A new viscoelastic law used for thermomechanical analysis in the automotive industry

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Microscale mapping of SPAD photon detection probability

International audienceAs silicon photomultiplier (SiPM) technology still has potential for further improvements, we describe a method to map the photon detection probability of a single-photon avalanche diode (SPAD) at the microscale level, in order to evaluate the behavior of the SPAD triggering capabilities as a function of the position of the incident light and to determine its homogeneity. For this purpose, we performed the analysis of the light response for a single active SPAD, with all its neighbors switched off, using a scanning setup, composed of the digital SiPM SPADnet-I data acquisition system, a microscope, a servo positioning system, a spectrograph and a CCD camera. We varied the wavelength of the incoming light to probe the device volume from the P-well to the N-well, with the ultimate goal of understanding and improving overall sensor performance. The comparison of this study to SPAD design and electric field technology computer-aided design (TCAD) simulation enables one to estimate how much the P-well drawn area could be increased to optimize fill factor without causing premature edge breakdown through guard ring failure

Identification of constitutive parameters in engineering problems

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Numerical lifetime assesement of engine parts submitted to thermomechanical fatigue, application to exhaust manifolds design

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Calcul de structure sous chargement thermomécanique: influence de la formulation anisotherme de la loi de comportement

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