<title>Phonon focusing effect on acousto-optic cell operation</title>

Phonon focusing effect on thermal conductivity of hexagonal group III-nitrides and silicon carbide crystals

Physics Letters A ◽

10.1016/j.physleta.2019.126120 ◽

2020 ◽

Vol 384 (5) ◽

pp. 126120 ◽

Cited By ~ 2

Author(s):

D.A. Chernodoubov ◽

A.V. Inyushkin

Keyword(s):

Thermal Conductivity ◽

Silicon Carbide ◽

Group Iii Nitrides ◽

Focusing Effect ◽

Group Iii ◽

Phonon Focusing

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Phonon-focusing effect with laser-generated ultrasonic surface waves

Physical Review B ◽

10.1103/physrevb.48.14502 ◽

1993 ◽

Vol 48 (19) ◽

pp. 14502-14508 ◽

Cited By ~ 38

Author(s):

Al. A. Kolomenskii ◽

A. A. Maznev

Keyword(s):

Surface Waves ◽

Focusing Effect ◽

Ultrasonic Surface Waves ◽

Phonon Focusing

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An improved magnetic prism design for a transmission electron microscope energy filter

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107344 ◽

1978 ◽

Vol 36 (1) ◽

pp. 40-41 ◽

Cited By ~ 1

Author(s):

John W. Andrew ◽

F.P. Ottensmeyer ◽

E. Martell

Keyword(s):

Energy Resolution ◽

Symmetry Plane ◽

Fringe Field ◽

Focal Distance ◽

Electron Trajectories ◽

Focusing Effect ◽

Transmission Electron ◽

Path Lengths ◽

Electron Microscopes ◽

Focusing Properties

Energy selecting electron microscopes of the Castaing-Henry prism-mirror-prism design suffer from a loss of image and energy resolution with increasing field of view. These effects can be qualitatively understood by examining the focusing properties of the prism shown in Fig. 1. A cone of electrons emerges from the entrance lens crossover A and impinges on the planar face of the prism. The task of the prism is to focus these electrons to a point B at a focal distance f2 from the side of the prism. Electrons traveling in the plane of the diagram (i.e., the symmetry plane of the prism) are focused toward point B due to the different path lengths of different electron trajectories in the triangularly shaped magnetic field. This is referred to as horizontal focusing; the better this focusing effect the better the energy resolution of the spectrometer. Electrons in a plane perpendicular to the diagram and containing the central ray of the incident cone are focused toward B by the curved fringe field of the prism.

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Focusing of inertial particles after the shock-wave intersection point

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2007.1.016 ◽

2007 ◽

Vol 5 ◽

pp. 145-150

Author(s):

I.V. Golubkina

Keyword(s):

Shock Wave ◽

Mass Concentration ◽

Gas Flow ◽

Intersection Point ◽

Plane Shock ◽

Inertial Particles ◽

Dusty Gas ◽

Focusing Effect ◽

Aerodynamic Focusing ◽

Particle Mass Concentration

The effect of the aerodynamic focusing of inertial particles is investigated in both symmetric and non-symmetric cases of interaction of two plane shock waves in the stationary dusty-gas flow. The particle mass concentration is assumed to be small. Particle trajectories and concentration are calculated numerically with the full Lagrangian approach. A parametric study of the flow is performed in order to find the values of the governing parameters corresponding to the maximum focusing effect.

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Phonon focusing in piezoelectric crystals: Quartz and lithium niobate

Physical Review B ◽

10.1103/physrevb.30.3470 ◽

1984 ◽

Vol 30 (6) ◽

pp. 3470-3481 ◽

Cited By ~ 22

Author(s):

G. L. Koos ◽

J. P. Wolfe

Keyword(s):

Lithium Niobate ◽

Piezoelectric Crystals ◽

Phonon Focusing

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Anomalous Beam Transport through Gabor (Plasma) Lens Prototype

Applied Sciences ◽

10.3390/app11104357 ◽

2021 ◽

Vol 11 (10) ◽

pp. 4357

Author(s):

Toby Nonnenmacher ◽

Titus-Stefan Dascalu ◽

Robert Bingham ◽

Chung Lim Cheung ◽

Hin-Tung Lau ◽

...

Keyword(s):

Cost Effective ◽

Stable Operation ◽

High Electron ◽

Beam Transport ◽

Focusing Effect ◽

Energy Proton ◽

Diocotron Instability ◽

Strong Focusing ◽

Axis Rotation ◽

Mev Protons

An electron plasma lens is a cost-effective, compact, strong-focusing element that can ensure efficient capture of low-energy proton and ion beams from laser-driven sources. A Gabor lens prototype was built for high electron density operation at Imperial College London. The parameters of the stable operation regime of the lens and its performance during a beam test with 1.4 MeV protons are reported here. Narrow pencil beams were imaged on a scintillator screen 67 cm downstream of the lens. The lens converted the pencil beams into rings that show position-dependent shape and intensity modulation that are dependent on the settings of the lens. Characterisation of the focusing effect suggests that the plasma column exhibited an off-axis rotation similar to the m=1 diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations.

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