Results 91 to 100 of about 4,663,474 (304)

Low Temperature Cold Atom Ion Source (LoTIS)

open access: yes, 2011
An experimental prototype of a cold-atom ion source for focused ion beam applications. \n\n Building upon the Nobel Prize-winning laser cooling techniques of NIST's Bill Phillips and Dave Wineland, NIST physicist Jabez McClelland applied laser cooling ...

core   +1 more source

Microstructure‑Dependent Phase Transformations Under High‑Pressure Laser Heating in Additively Manufactured AlCrFe2Ni2

open access: yesAdvanced Engineering Materials, EarlyView.
Additively manufactured AlCrFe2Ni2 with contrasting BCC/B2‐dominant and lamellar FCC + BCC/B2 microstructures exhibits the same pressure‐induced BCC/B2 → HCP transformation. Under laser heating at high pressure, HCP is destabilized, and a cubic BCC/B2 + FCC assemblage is recovered, while the lower‐scan‐speed microstructure transforms at a lower ...
Raimundas Sereika   +5 more
wiley   +1 more source

Shaping the far-zone intensity, degree of polarization, angle of polarization, and ellipticity angle using vector Schell-model sources

open access: yesResults in Physics, 2019
This paper presents a method to control both the shape and polarization of a beam in the far field using a vector Schell-model source. Given a desired far-zone beam shape and polarization, and applying Fourier and statistical optics theory, we derive the
Milo W. Hyde, IV
doaj   +1 more source

Extending gaussian beam descriptions by complex-source beam solutions

open access: yes
International audienceA hybridization of paraxial Gaussian beam shooting based on frame decomposition of source fields, and Complex Source beam solutions of diffraction problems is presented and numerically tested for the canonical problem of diffraction
Klinkenbusch, Ludger   +2 more
core   +1 more source

Arc current modulator for neutral beam source [PDF]

open access: yes, 1979
The design of an arc current modulator for a 10 x 40 cm neutral beam source is described. The arc modulator has been designed for the TFTR Neutral Beam Source Test Facility. The purpose of the arc modulator is twofold; first, the arc modulator shapes the
Arthur, A. A.   +5 more
core  

Impact of Hydrogen Incorporation on Electronic and Magnetic Structure of X2CrNi18‐9 Stainless Steel

open access: yesAdvanced Engineering Materials, EarlyView.
Hydrogen uptake in austenitic stainless steel alters both its electronic and magnetic structure. Seebeck measurements reveal hydrogen‐induced shifts in the electronic density of states, while neutron scattering uncovers nanoscale inhomogeneities that grow upon hydrogen incorporation, with the most pronounced effect observed in the PBF as‐built state ...
Torben Tappe   +9 more
wiley   +1 more source

Simulation of a beam rotation system for a spallation source

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2015
With a nominal beam power of nearly 1 MW on target, the Swiss Spallation Neutron Source (SINQ), ranks among the world’s most powerful spallation neutron sources.
Tibor Reiss   +4 more
doaj   +1 more source

Physics Potential of a Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande [PDF]

open access: yes, 2015
39 pages, 26 figures, submitted to PTEPHyper-Kamiokande will be a next generation underground water Cherenkov detector with a total (fiducial) mass of 0.99 (0.56) million metric tons, approximately 20 (25) times larger than that of Super-Kamiokande.
Detwiler, J   +786 more
core   +2 more sources

Influence of Particle Shape and Size in Copper‐Based Low‐Temperature Metallization Paste for Solar Cells

open access: yesAdvanced Engineering Materials, EarlyView.
Particle morphology controls the balance between printability and electrical connectivity in low‐temperature AgCu/Ag metallization pastes. Flake‐shaped AgCu particles form extended low‐resistance contacts, whereas spherical particles favor processability at high metal loading. Fine Ag particles further tune void filling and conductive‐network formation
O. Mhirsi   +3 more
wiley   +1 more source

Microstructural, Mechanical, and Textural Evolution of Dissimilar Combination of Laser‐Welded Maraging Steel and 4340 Steel

open access: yesAdvanced Engineering Materials, EarlyView.
The present work reports the microstructural, mechanical, and texture evolution of a dissimilar combination laser‐welded maraging steel with 4340 steel. This is important for aerospace applications. The demand for dissimilar welding is growing rapidly with the requirement of efficient and durable joints.
Bharat Behl   +3 more
wiley   +1 more source

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