Results 61 to 70 of about 321,934 (301)

A bremsstrahlung gamma-ray source based on stable ionization injection of electrons into a laser wakefield accelerator [PDF]

, 2016
Laser wakefield acceleration permits the generation of ultra-short, high-brightness relativistic electron beams on a millimeter scale. While those features are of interest for many applications, the source remains constraint by the poor stability of the ...
Conejero, E., Döpp, A., Goddet, J-P., Guillaume, E., Iaquanello, G., Lefrou, T., Lifschitz, A., Malka, V., Phuoc, K. Ta, Rousseau, P., Ruiz, C., Sylla, F., Tafzi, A., Thaury, C.   +13 more
core   +4 more sources

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

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, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

High Beam Quality ArF Excimer Lasers.

The Review of Laser Engineering, 1992
The present status and recent efforts toward high beam quality ArF excimer laser, including the authors' experimental results, are reviewed with respect to spectral narrowing, spatial coherence, and high power operation. High-beam quality KrF lasers are also reported for comparison.
Yasuo ITAKURA, Ryoichi NODOMI, Masao KAKIMOTO   +2 more
openaire   +2 more sources

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

High beam quality 400W practical all-solid-state laser for laser beam texture [PDF]

SPIE Proceedings, 2010
A high-average-power and high-beam-quality diode-side-pumped solid-state laser was designed carefully for laser beam texture. By using of low concentration Nd:YAG crystals with thermally near-unstable resonator design and two-rod birefringence compensation technology, the 1064 nm cw output power of 400 W at pump power of 1170 W was achieved with the
Aicong Geng, Mingjiang Yang, Ci Zhao, Baohe Li   +3 more
openaire   +1 more source

Theoretical tools for atom laser beam propagation

, 2008
We present a theoretical model for the propagation of non self-interacting atom laser beams. We start from a general propagation integral equation, and we use the same approximations as in photon optics to derive tools to calculate the atom laser beam ...
Aspect, A., Bordé, C. J., Bouyer, P., Coq, Y. Le, Guerin, W., Impens, F., Riou, J. -F.   +6 more
core   +3 more sources

Modeling Human Performance on Statistical Word Segmentation Tasks [PDF]

, 2007
Harnessing the orbital angular momentum (OAM) of light is an appealing approach to developing photonic technologies for future applications in optical communications and high-dimensional quantum key distribution (QKD) systems. An outstanding challenge to
Cai, Xinlun, Chen, Lifeng, Ho, Daniel, Li, Huanlu, Phillips, David B., Wang, Xuyang, Yu, Siyuan, Zhou, Xiaoqi, Zhu, Jiangbo   +8 more
core   +1 more source

Process‐Informed Analysis of As‐Built Metal Additive Surface Features

Advanced Engineering Materials, EarlyView.
This article introduces a novel method for feature‐based surface texture characterisation directly incorporating manufacturing variables into the feature extraction workflow. This marks a major step towards identifying process‐specific surface properties and their influence on part function and hence a holistic understanding of process–structure ...
Theresa Buchenau, Adam Thompson, Hauke Brüning, Marc Amkreutz, Bernd Mayer, Samanta Piano   +5 more
wiley   +1 more source

Simulation Analysis of a Wavefront Reconstruction of a Large Aperture Laser Beam

Sensors, 2023
In order to solve the problem of atmospheric influence on the far-field measurement of the quality of a laser beam, we proposed a direct wavefront measurement system based on the Hartmann detection principle, which can measure large apertures and high ...
Gangyu Wang, Zaihong Hou, Laian Qin, Xu Jing, Yi Wu   +4 more
doaj   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source