Results 241 to 250 of about 4,663,474 (304)
Some of the next articles are maybe not open access.
Vacuum, 1984
Abstract Ion beam V etching may give rise to undesirable effects such as uneven erosion and ion migration in dielectrics, even when the surface is neutralized by electron flooding. The effects appear due to a remaining charge imbalance on a microscopic scale, which is absent when bombarding with an uncharged beam.
openaire +1 more source
Abstract Ion beam V etching may give rise to undesirable effects such as uneven erosion and ion migration in dielectrics, even when the surface is neutralized by electron flooding. The effects appear due to a remaining charge imbalance on a microscopic scale, which is absent when bombarding with an uncharged beam.
openaire +1 more source
Beam saturation in the Munich atomic-beam-source
AIP Conference Proceedings, 1998A Stern-Gerlach atomic beam ion source (ABS) with ECR ionizer and cesium gas-target as charge exchange units is under construction. The goal is to achieve intense negative beams of polarized H− and D− of high brightness for injection into the 14 MV MP tandem accelerator with beam intensity of about 2 μA on target. At the entrance of the ECR ionizer the
R. Hertenberger +6 more
openaire +1 more source
Studies on Beam Formation in an Atomic Beam Source
AIP Conference Proceedings, 2009Atomic beam sources (ABS) are widely used workhorses producing polarized atomic beams for polarized gas targets and polarized ion sources. Although they have been used for decades the understanding of the beam formation processes is crude. Models were used more or less successfully to describe the measured intensity and beam parameters.
A. Nass +8 more
openaire +1 more source
Multiple beam and wide beam ion sources
Journal of Physics E: Scientific Instruments, 1972Two modified forms of a new type of electrostatic ion source are described. The one produces multiple beams of positive ions and in the other a wide ion beam is produced. The sources can be used for ion etching either a large number of small specimens or a large area specimen.
R K Fitch, K R O'Shea, G J Rushton
openaire +1 more source
Beam formation at the Munich atomic beam source
Review of Scientific Instruments, 1998A Stern–Gerlach atomic-beam ion source (ABS) with an electron cyclotron resonance (ECR) ionizer and a Cs gas target as charge exchange units will replace the Munich Lamb–Shift polarized hydrogen source. The goal is to achieve intense negative beams of polarized H− and D− of high brightness for injection into the 14 MV MP tandem accelerator and beam ...
R. Hertenberger +6 more
openaire +1 more source
2009
CO2 lasers emit radiation at a wavelength of 10.6 μm. This is enabled via transition between two vibronical states of the linear CO2 molecule. Excitation in the upper laser level takes place via collision with an electron or, much more likely, via collision with a vibronically excited nitrogen molecule.
openaire +1 more source
CO2 lasers emit radiation at a wavelength of 10.6 μm. This is enabled via transition between two vibronical states of the linear CO2 molecule. Excitation in the upper laser level takes place via collision with an electron or, much more likely, via collision with a vibronically excited nitrogen molecule.
openaire +1 more source
Virtual sources for a cosh-Gaussian beam
Optics Letters, 2007On the basis of superposition of beams, a group of virtual sources that generate a cosh-Gaussian wave is identified. A closed-form expression is derived for this cosh-Gaussian wave, which, in the appropriate limit, yields the paraxial approximation for the cosh-Gaussian beam.
Yucheng, Zhang +4 more
openaire +2 more sources
Toroidal Electron Beam Radiation Sources
1997 IEEE International Magnetics Conference (INTERMAG'97), 1997Permanent magnet structures based on magic spheres and magic toroids afford the possibility of synchrotron and wiggler radiation sources in which the electrons describe circular mean paths rather than the usual rectilinear ones. We analyze toroidal structures with uniform fields in their interior cavities which cause injected electrons to follow ...
H.A. Leupold, A.S. Tilak, E. Potenziani
openaire +1 more source
Complex Source Beam Diffraction by a Wedge
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019A Uniform Geometrical Theory of Diffraction (UTD) solution for inhomogeneous plane wave diffraction by a Perfect Electrically Conducting (PEC) wedge has been presented in [1]. More recently, this solution has been extended to analyze the case of an incident field radiated by a source located in the complex space (Complex Source Beam, CSB) [2], [3 ...
Terranova S., Manara G., Klinkenbusch L.
openaire +2 more sources