Results 41 to 50 of about 3,519,369 (196)

Random pinhole attenuator for high-power laser beams

High Power Laser Science and Engineering
The intensity attenuation of a high-power laser is a frequent task in the measurements of optical science. Laser intensity can be attenuated by inserting an optical element, such as a partial reflector, polarizer or absorption filter.
Seong Cheol Park, Hyeok Yun, Jin Woo Yoon, Seong Ku Lee, Jae Hee Sung, Il Woo Choi, Chang Hee Nam, Kyung Taec Kim   +7 more
doaj   +1 more source

Towards optical polarization control of laser-driven proton acceleration in foils undergoing relativistic transparency

Nature Communications, 2016
Intense laser pulse interaction with ultra-thin foils constitutes a promising approach for proton acceleration. Here the authors show that the degree of ellipticity in the laser beam polarization can be used to control the proton beam profile.
Bruno Gonzalez-Izquierdo, Martin King, Ross J. Gray, Robbie Wilson, Rachel J. Dance, Haydn Powell, David A. Maclellan, John McCreadie, Nicholas M. H. Butler, Steve Hawkes, James S. Green, Chris D. Murphy, Luca C. Stockhausen, David C. Carroll, Nicola Booth, Graeme G. Scott, Marco Borghesi, David Neely, Paul McKenna   +18 more
doaj   +1 more source

Model-independent inference of laser intensity

Physical Review Accelerators and Beams, 2020
An ultrarelativistic electron beam passing through an intense laser pulse emits radiation around its direction of propagation into a characteristic angular profile.
T. G. Blackburn, E. Gerstmayr, S. P. D. Mangles, M. Marklund   +3 more
doaj   +1 more source

Application of a liquid crystal spatial light modulator to laser marking [PDF]

, 2011
Laser marking is demonstrated using a nanosecond (ns) pulse duration laser in combination with a liquid crystal spatial light modulator to generate two-dimensional patterns directly onto thin films and bulk metal surfaces.
Rainer J. Beck, Jonathan D. Shephard, Parry, Jonathan P., Hand, Duncan P.; id_orcid, Beck, Rainer J, Jonathan P. Parry, Duncan P. Hand, Shephard, Jonathan D.; id_orcid   +7 more
core   +1 more source

Longitudinal bunch profile measurement of operational H^{-} beam using laser wire and virtual slit

Physical Review Accelerators and Beams, 2023
We propose and demonstrate a nonintrusive diagnostic technique for measuring longitudinal bunch profiles of an operational high-power hydrogen ion (H^{−}) beam in the Spallation Neutron Source (SNS) linear accelerator at Oak Ridge National Laboratory ...
Y. Liu, C. Long, A. Shishlo, A. Aleksandrov, D. Brown, R. Thurman-Keup, V. Scarpine   +6 more
doaj   +1 more source

Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloy [PDF]

, 2014
tThe direct metal deposition (DMD) laser technique is a free-form metal deposition process, which allowsgenerating a prototype or small series of near net-shape structures.
GORNY, Cyril, CARRON, Denis, LE MASSON, Philippe, GHARBI, Myriam, PEYRE, Patrice, FABBRO, Rémy, CARIN, Muriel, MORVILLE, Simon   +7 more
core   +1 more source

Electronic diagnostics system for the analysis of laser beam profile

Iraqi Journal of Physics, 2011
In this work the analysis of laser beam profile system ,using a two dimensional CCD (Charge Coupled Device) arrays, is established. The system is capable of producing video graphics that give a two dimensional image of laser beam.
Bushra R. Mehdi
doaj  

Laser beam cutting and welding of coronary stents [PDF]

, 2008
Coronary stents are thin-walled and mesh-structured metallic implants, which are made generally by laser beam cutting of high-precision tubes of 90-120 micrometer thickness.
Dobránszky, János, Bella, Sz., Meszlényi, György, Nagy, P.   +3 more
core   +1 more source

Influence of laser beam shape and post heat-treatment on the microstructure and mechanical properties of nickel-based alloy IN718 manufactured by laser powder bed fusion

Journal of Materials Research and Technology
This study examines the effect of Gaussian and ring-shaped laser beam profiles on the microstructural development and mechanical properties of the PBF-LB/M processed nickel-based alloy Inconel 718 in its as-built and post-heat-treated conditions.
Matjaž Godec, Narges Mirzabeigi, Črtomir Donik, Danijela A. Skobir Balantič, Simon Malej, Irena Paulin, Bojan Podgornik, Jonas Grünewald, Tobias Novotny, Florian Bayer, Francisco Ruiz-Zepeda, Katrin Wudy   +11 more
doaj   +1 more source

Beam Profile Measurements and Simulations of the Petra Laser-Wire [PDF]

Proceedings of the 2005 Particle Accelerator Conference, 2006
The Laser-wire will be an essential diagnostic tool at the International Linear Collider. It uses a finely focussed laser beam to measure the transverse profile of electron bunches by detecting the Compton-scattered photons (or degraded electrons) downstream of where the laser beam intersects the electron beam.
Carter, J, Agapov, I, Blair, G, Boorman, G, Driouichi, C, Poirier, F, Price, M, Kamps, T, Balewski, K, Lewin, H, Schreiber, S, Wittenburg, K, Delerue, N, Howell, D, Boogert, S, Malton, S   +15 more
openaire   +3 more sources