Results 31 to 40 of about 20,337 (305)
High-power free-electron laser amplifier using a scalloped electron beam and a two-stage wiggler
Physical Review Special Topics. Accelerators and Beams, 2006 High-power free-electron laser (FEL) amplifiers present many practical design and construction problems. One such problem is possible damage to any optical beam control elements beyond the wiggler.
D. C. Nguyen, H. P. Freund, W. Colson
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Turbulence induced beam spreading of higher order mode optical waves
, 2002 It is well known that laser beams spread as they propagate through free space due to natural diffraction, and that there is additional spreading when optical waves propagate through atmospheric turbulence.
Young, Cynthia Y. +2 more
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Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
A magnetic study of the west Iberia and conjugate rifted continental margins: constraints on rift-to-/drift processes [PDF]
, 1999 The analysis and modelling of magnetic anomalies at the conjugate rifted continental margins of the southern Iberia Abyssal Plain (TAP) and Newfoundland Basin have revealed that the sources of magnetic anomalies are distinctly different across both each ...
Russell, Simon Mark
core
Laser Powder Bed Fusion of Alumina: Effects of Scanning Strategies on External and Internal Defects
Advanced Engineering Materials, EarlyView.This study investigates how scanning strategies affect pure alumina in laser powder bed fusion. Linear 45° scanning yields uniform surfaces but high porosity, while the island‐concentric strategy provides higher density with through‐holes favorable for infiltration. Findings highlight pathways toward optimizing defect‐free alumina parts.
Mohamed Abdelmoula +7 more
wiley +1 more source
Joint time and beam domain non-orthogonal multiple access
Tongxin xuebao, 2021 In order to improve the system’s ability to accommodate connected devices, a joint time and beam domain non-orthogonal multiple access (NOMA) scheme was proposed, which was suitable for millimeter wave massive multiple-input multiple-output (MIMO ...
Zhaoyang ZHANG +3 more
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Seismic Behavior and Study of RCS Composite Frame Composed of Steel Beams and Strong Concrete Column
Civil and Environmental Engineering, 2019 With spreading of population and increasing of instruction, and also because of limited resources and materials, the demand for using novel materials in building industry has increased.
Khodabandehlo Ahmadreza +1 more
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The Orbital Angular Momentum Spreading for Cylindrical Vector Beams in Turbulent Atmosphere
IEEE Photonics Journal, 2017 The cylindrical vector beams (CVBs) compose two circularly polarized vortex beams carrying orbital angular momentum (OAM) states with the opposite topological charge.
Yangsheng Yuan +5 more
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Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology
Advanced Engineering Materials, EarlyView.We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham +7 more
wiley +1 more source
Journal of Radiation Research and Applied Sciences, 2022 Introduction: We developed a convergent arcSIN (cASIN) technique capable of dealing with the virtual source position delivered by different carbon ion energies from the pattern of scanning-passive scatter beam in this study.
Hai-Shi Chen, Li Meng, Jia-Ming Wu
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