Results 61 to 70 of about 62,100 (308)

Material dependent influence of ring/spot beam profiles in laser powder bed fusion

Additive Manufacturing Letters
In recent years, the topic of beam shaping for improved laser material processing has rapidly grown influencing metal laser powder bed fusion (PBF-LB/M).
Lova Chechik, Karen Schwarzkopf, Richard Rothfelder, Jonas Grünewald, Michael Schmidt   +4 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Multispot optics for beam shaping of high-power single-mode and multimode lasers

, 2021
The performance of various laser technologies, such as welding, laser powder bed fusion (LPBF), brazing, cladding, and sheet metal cutting, based on the use of high-power multimode fiber lasers, fiber-coupled solid-state, and diode lasers, can be ...
Takuji Nara, Alexander Laskin, Laskin, Alexander,, Volpp, Joerg,, Nara, Takuji,, Seong Ryol Jung, Joerg Volpp, Vadim Laskin, Jung, Seong Ryol,, Laskin, Vadim,   +9 more
core   +1 more source

Characterizing ultralow emittance electron beams using structured light fields

Physical Review Accelerators and Beams, 2021
Novel schemes for generating ultralow emittance electron beams have been developed in past years and promise compact particle sources with excellent beam quality suitable for future high-energy physics experiments and free-electron lasers.
Andreas Seidel, Jens Osterhoff, Matt Zepf   +2 more
doaj   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Optical trapping with a perfect vortex beam

, 2014
The authors would like to thank the UK Engineering and Physical Sciences Research Council (EPSRC) for funding.Vortex beams with different topological charge usually have different profiles and radii of peak intensity.
Arita, Yoshihiko, Ewan M. Wright, Wright, Ewan M., Michael Mazilu, Chen, Mingzhou, Mazilu, Michael, Dholakia, Kishan, Yoshihiko Arita, Mingzhou Chen, Kishan Dholakia   +9 more
core   +1 more source

Simultaneous ion beam profile scan using a single laser source

Physical Review Special Topics. Accelerators and Beams, 2013
We report on the world’s first experiment of a simultaneous profile scan of the hydrogen ion (H^{-}) beam using a laser wire system. The system was developed and brought to operational level of application at the superconducting linac of the Spallation ...
Y. Liu, C. Long, C. Huang, R. Dickson, A. Aleksandrov   +4 more
doaj   +1 more source

Beam profile measurements with the 2-D laser-wire at petra [PDF]

2007 IEEE Particle Accelerator Conference (PAC), 2007
The current PETRA II Laser-Wire system, being developed for the ILC and PETRA III, uses a piezo- driven mirror to scan laser light across an electron bunch. This paper reports on the recently installed electron-beam finding system, presenting recent horizontal and vertical profile scans with corresponding studies.
Price, M. T., Blair, G. A., Boorman, G., Boogert, S. T., Bosco, A., Malton, S., Kamps, T., Balewski, K., Elsen, E., Gharibyan, V., Lewin, H.-C., Poirier, F., Schreiber, S., Walker, N., Wittenburg, K.   +14 more
openaire   +3 more sources

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Distributed grating-assisted coupler for optical all-dielectric electron accelerator

Physical Review Special Topics. Accelerators and Beams, 2005
A Bragg waveguide consisting of multiple dielectric layers with alternating index of refraction becomes an excellent option to form electron accelerating structure powered by high power laser sources.
Zhiyu Zhang, Sami G. Tantawi, Ronald D. Ruth   +2 more
doaj   +1 more source