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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
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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
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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.
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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.
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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
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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.
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2015
In this section we consider the fate of energetic ions (1–100 keV) incident on a solid surface. The 10 ways in which ions can interact with a surface are illustrated in Fig. 8.1. An incoming ion can be backscattered by an atom or group of atoms in the bombarded sample (1).
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In this section we consider the fate of energetic ions (1–100 keV) incident on a solid surface. The 10 ways in which ions can interact with a surface are illustrated in Fig. 8.1. An incoming ion can be backscattered by an atom or group of atoms in the bombarded sample (1).
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Gas source molecular beam epitaxy
Conference on Lasers and Electro-Optics, 1985The replacement of the elemental sources of conventional MBE with simple compounds, first reported in 1980 [1], was initiated in order to bring the advantages of molecular beam epitaxy to the growth of GaxIn1−xAs1−yPy/InP heterostructures. These advantages center about precision in layer thickness and abruptness in doping and heterojunction interfaces.
M B Panish, H Temkin
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Virtual source for a Hermite–Gauss beam
Optics Letters, 2003A virtual source that generates a Hermite-Gauss wave of mode numbers m and n is introduced. An expression is obtained for this Hermite-Gauss wave. From this expression, the paraxial approximation and the first 3 orders of nonparaxial corrections for the corresponding paraxial Hermite-Gauss beam are determined.
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Virtual source for the Bessel–Gauss beam
Optics Letters, 2002The virtual source for generation of the fundamental scalar Bessel-Gauss wave is identified. An expression is derived for the Bessel-Gauss wave, which, in the appropriate limit, yields the paraxial approximation for the fundamental Bessel-Gauss beam. For the azimuthally symmetric beam, the first-order nonparaxial correction to the on-axis field is also
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Cone Beam Reconstruction with Sources on a Curve
SIAM Journal on Applied Mathematics, 1985From author's summary: ''An inversion procedure is developed for reconstructing a function of compact support in \(R^ 3\) from its divergent beam X-ray transform with source on a curve. Estimates in Sobolev norms are established for the inversion operator.''
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