نتایج جستجو برای: micro beams
تعداد نتایج: 147416 فیلتر نتایج به سال:
Efficient coupling of intense laser pulses to solid-density matter is critical to many applications including ion acceleration for cancer therapy. At relativistic intensities, the focus has been mainly on investigating various laser beams irradiating initially overdense flat interfaces with little or no control over the interaction. Here, we propose a novel approach that leverages recent advanc...
Micro-Pattern Gaseous Detectors (MPGD) have opened the way for the construction of detectors whose performance surpasses that of the previous generations in terms of spatial resolution, high-rate capability and increased radiation hardness. Led by the Micro-Mesh Gaseous Structure (Micromegas) and the Gas Electron Multiplier (GEM), some MPGDs are mature technologies used in a variety of experime...
Bimaterial microcantilevers are used in numerous applications in microelectromechanical systems (MEMS) for thermal, mechanical, optical, tribological and biological functionalities. Unfortunately, the residual stress-induced curvature and combined effects of creep and stress relaxation in the thin film significantly compromises the performance of these structures. To fully understand the themom...
The spatial control of atoms, beyond their trapping in stationary potentials, has been continuously gaining importance in investigations of ultracold gases and in the application of atomic ensembles and single atoms for cavity QED and quantum information studies. Recent progress includes the trapping and control of single atoms in dynamic potentials [1, 2], the sub-micron positioning of individ...
The dynamic characterization of a set of gold micro beams by electrostatic excitation in presence of residual stress gradient has been studied experimentally. A method to determine the micro-cantilever residual stress gradient by measuring the deflection and curvature and then identifying the residual stress model by means of frequency shift behaviour is presented. A comparison with different n...
Understanding the impact of microstructure on thermo-mechanical behavior oxide nuclear fuels is vital to predicting their performance through multiscale models. Evaluating mechanical properties at sub-grain length scale key developing these In this work, 3D finite element (FE) models were constructed simulate micrometer-scale bending micro-cantilever beams fabricated using porous polycrystallin...
An original approach for mechanical characterization was developed using indentation assisted micro-bending. Aiming at the reliable measurement of elastic modulus multi-scale solids, technique relies on deflection measurements cantilever-type beams modeled within framework foundation. The inference is carried out by postulating inverse problem and solving it via error minimization approach. val...
The complex nano-morphology of modern soft-matter materials is successfully probed with advanced grazing-incidence techniques. Based on grazing-incidence small- and wide-angle X-ray and neutron scattering (GISAXS, GIWAXS, GISANS and GIWANS), new possibilities arise which are discussed with selected examples. Due to instrumental progress, highly interesting possibilities for local structure anal...
Experimental validation of a distortion removal technique for multi-chip free-space optical shuffle interconnections is presented. The free-space fabric links dense two-dimensional arrays of vertical cavity surface emitting laser(s) (VCSEL)(s) and detectors and must achieve full field registration on the order of 10 microns across the entire array. The new hybrid micro-macro optical concept rea...
Meandering beams, crenellated surfaces, and zigzag-shaped electrodes are employed as compliant elements in micro-scale applications ranging from springs attached to proof masses in micro-electro-mechanical systems (MEMS) to stretchable electrodes in flexible electronics and dielectric elastomer actuators. An understanding of how the meander shape affects the stiffness of these structures would ...
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