Results 211 to 220 of about 120,604 (268)

Crystalline ion beams

Nature, 2001
By freezing out the motion between particles in a high-energy storage ring, it should be possible to create threads of ions, offering research opportunities beyond the realm of standard accelerator physics. The usual heating due to intra-beam collisions should completely vanish, giving rise to a state of unprecedented brilliance.
Schätz, Tobias, Schramm, Ulrich, Habs, Dietrich   +2 more
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Ion beam deposition and in-situ ion beam analysis

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1992
The direct deposition in thin films and the production of very shallow junctions by ultralow energy ion implantation involves the interaction of ions with only the outermost surface layers of a solid. Quantitative structural and composition analysis of the grown or implanted layers requires the use of techniques with extremely high depth resolution.
A.H. Al-Bayati, K.G. Orrman-Rossiter, D.G. Armour, J.A. Van den Berg, S.E. Donnelly   +4 more
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Electron beam ion source and electron beam ion trap (invited)

Review of Scientific Instruments, 2010
The electron beam ion source (EBIS) and its trap variant [electron beam ion trap (EBIT)] celebrated their 40th and 20th anniversary, respectively, at the EBIS/T Symposium 2007 in Heidelberg. These technologically challenging sources of highly charged ions have seen a broad development in many countries over the last decades.
Reinard, Becker, Oliver, Kester
openaire   +2 more sources

Ion-beam channeling in a quasicrystal

Physical Review B, 1992
We have observed ion-beam channeling in a quasicrystal. For 1-MeV He-4+ ions in icosahedral Al-Cu-Fe the maximum effect found is 36%. The full width at half maximum of the observed dips is 1.3-degrees. The effect persists up to great depths (> 200 nm), thus showing a high degree of ordering in this phase.
VANVOORTHUYSEN, EHD, SMULDERS, PJM, WERKMAN, RD, DEBOER, JL, VANSMAALEN, S   +4 more
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Ion recombination correction in carbon ion beams

Medical Physics, 2016
Purpose:In this work, ion recombination is studied as a function of energy and depth in carbon ion beams.Methods:Measurements were performed in three different passively scattered carbon ion beams with energies of 62 MeV/n, 135 MeV/n, and 290 MeV/n using various types of plane‐parallel ionization chambers.
S, Rossomme, J, Hopfgartner, N D, Lee, A, Delor, R A S, Thomas, F, Romano, A, Fukumura, S, Vynckier, H, Palmans   +8 more
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Focused ion beam metrology

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 1995
The measurement of resist image size using a finely focused ion beam (FIB) is described. Comparisons of FIB and scanning electron microscope (SEM) measurements of resist features are presented. The short penetration range of an ion relative to an electron is shown to offer fundamental advantages for critical dimension metrology.
A. Wagner, P. Blauner, P. Longo, S. Cohen   +3 more
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Dosimetry for ion beam radiotherapy

Physics in Medicine and Biology, 2010
Recently, ion beam radiotherapy (including protons as well as heavier ions) gained considerable interest. Although ion beam radiotherapy requires dose prescription in terms of iso-effective dose (referring to an iso-effective photon dose), absorbed dose is still required as an operative quantity to control beam delivery, to characterize the beam ...
Christian P, Karger, Oliver, Jäkel, Hugo, Palmans, Tatsuaki, Kanai   +3 more
openaire   +2 more sources

Ion-beam plasma and the propagation of intense compensated ion beams

Soviet Physics Uspekhi, 1977
Studies of the properties of plasma produced during the neutralization of the space charge of an intense ion beam are reviewed. Compensation of an ion beam by charges produced as a result of the ionization of a gas by the beam or by charges introduced from outside is considered.
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Ion-beam-induced amorphization

Materials Science and Engineering, 1987
Abstract Ion beams are capable of inducing the formation of metastable amorphous phases in metallic systems, depending on the coupling between irradiation conditions, namely temperature, implanted species, energy and fluence, and target characteristics such as constituents, stoichiometry and structure.
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Ion Beam Analysis

Science, 1976
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