Results 41 to 50 of about 26,055 (247)

Diffractive lenses for neutron techniques

Scientific Reports
Many neutron techniques can greatly benefit from enhanced neutron lenses for focusing and imaging. In this work, we revisit the potential of diffractive optics for neutron beams, building on advanced high-resolution nano-lithography techniques developed ...
Mano raj Dhanalakshmi Veeraraj, Di Qu, Shuai Zhao, Peng Qi, Konstantins Jefimovs, Matteo Busi, Joachim Kohlbrecher, Christian David, Markus Strobl, Joan Vila-Comamala   +9 more
doaj   +1 more source

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

Efficient diffractive phase optics for electrons

New Journal of Physics, 2014
Electron diffraction gratings can be used to imprint well-defined phase structure onto an electron beam. For example, diffraction gratings have been used to prepare electron beams with unique phase dislocations, such as electron vortex beams, which hold ...
Tyler R Harvey, Jordan S Pierce, Amit K Agrawal, Peter Ercius, Martin Linck, Benjamin J McMorran   +5 more
doaj   +1 more source

High-Beta Optics and Running Prospects

Instruments, 2019
Dedicated high-beta optics are used to make forward proton scattering measurements possible at the LHC. Following a short general introduction and history of special high-beta optics and running conditions, we describe the two types of special high-beta ...
Helmut Burkhardt
doaj   +1 more source

Diffraction-free subwavelength-beam optics

, 2003
Diffraction is a fundamental property of light propagation. Owing to this phenomenon,light diffracts out in all directions when it passes through a subwavelength slit.This imposes a fundamental limit on the transverse size of a light beam at a given ...
Adams, Arlt, Ash, Bateman, Besieris, Bethe, Betzig, Betzig, Bouchal, Bouchal, Brittingham, Canning, Chavez-Cerda, Chew, Chutinan, Dogariu, Durnin, Ebbesen, Girard, Gori, Grunwald, Gutirrez-Vega, Gutirrez-Vega, Hafizi, Herman, Jarutis, Jones, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Lewis, Lezec, M. Mechler, Marcuse, Martin-Moreno, McDonald, Neerhoff, Okamoto, Orlov, Orlov, Ouzounov, Porras, Porras, Porras, Porras, Rayleigh, Rushin, Rushin, S.V. Kukhlevsky, Saari, Saleh, Skryabin, Snyder, Stratton, Tsao, Vassallo, Yariv, Zamboni-Rached, Zamboni-Rached, Ziolkowski   +62 more
core   +1 more source

The Impact of High‐Productivity Processing on the Fatigue Failure of an Additive Manufactured Superalloy HAYNES 282

Advanced Engineering Materials, EarlyView.
The low cycle fatigue life of additive manufactured HAYNES® 282® superalloy was investigated for conventional and high‐productivity processing: samples of the former lasted 1400–1700 cycles, while samples of the latter failed at ~ 1200 cycles, at 760 °C and 1% strain.
Abdul Shaafi Shaikh, Ahmed Fardan, Tatiana Mishurova, Eduard Hryha   +3 more
wiley   +1 more source

A Holographic Diffuser Generalised Optical Differentiation Wavefront Sensor

, 2017
The wavefront sensors used today at the biggest World's telescopes have either a high dynamic range or a high sensitivity, and they are subject to a linear trade off between these two parameters.
Bergomi, Maria, Biondi, Federico, Carolo, Elena, Chinellato, Simonetta, Dima, Marco, Farinato, Jacopo, Greggio, Davide, Gullieuszik, Marco, Magrin, Demetrio, Marafatto, Luca, Portaluri, Elisa, Ragazzoni, Roberto, Umbriaco, Gabriele, Vassallo, Daniele, Viotto, Valentina   +14 more
core   +1 more source

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

Advanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh, Shashank Deepak Prabhu, Jannik Huber, Lioba Fischer, Gerhard Wolf, Nico Hempel, Peter Mayr   +6 more
wiley   +1 more source

Angle-Multiplexed Metasurfaces: Encoding Independent Wavefronts in a Single Metasurface under Different Illumination Angles

Physical Review X, 2017
The angular response of thin diffractive optical elements is highly correlated. For example, the angles of incidence and diffraction of a grating are locked through the grating momentum determined by the grating period.
Seyedeh Mahsa Kamali, Ehsan Arbabi, Amir Arbabi, Yu Horie, MohammadSadegh Faraji-Dana, Andrei Faraon   +5 more
doaj   +1 more source

Duplex Stainless Steel Laser‐Surface Textured: Stability in Brine Solution

Advanced Engineering Materials, EarlyView.
Controlled laser‐surface treatment (LST) of duplex DSS2205 steel is performed to increase its stability in brine solution under cyclic electrochemical assays. The superior protection with respect to flat and smooth panels is attributed to the presence of FeCr2O4 as the main protective oxide layer in the LST surface, after corrosion tests. The stability
Mohammad Rezayat, Hamidreza Enshaei, Elaine Armelin, José I. Iribarren, Antonio Mateo, Miguel Morales   +5 more
wiley   +1 more source