Results 231 to 240 of about 24,731 (260)

Relativistic effects in core-loss electron diffraction

Physical Review B, 2006
We present experimental evidence of relativistic fine structure in inelastic electron diffraction patterns of a crystalline solid at zone-axis orientation. Diffraction patterns formed by 200 keV electrons suffering energy losses within 10 eV of the silicon K-ionization edge at zone axis exhibit excellent agreement with a relativistic theory of atomic
Christian Dwyer, Jonathan S. Barnard
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A Low-Loss Diffraction Grating Frequency Multiplexer

IEEE Transactions on Microwave Theory and Techniques, 1978
A quasi-optical frequency multiplexer based on a blazed diffraction grating is studied. Experimental data, supported by semi-quantitative theoretical considerations, show that the multiplexer is an efficient channel-dropping filter well suited to use in the millimeter wave region.
P.S. Henry, J.T. Ruscio
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Diffraction losses associated with curved ultrasonic transducers

Journal of Physics D: Applied Physics, 1977
Numerical computations are used to evaluate the values of diffraction losses in a coaxial transducer pair system where the transducers are spherically curved and identically shaped. The complex pressure field of the emitting transducer on the surface of the receiver is calculated with the aid of the impulse response function of a curved radiator.
A Penttinen, M Luukkala
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Gain reduction in FELs due to diffraction losses

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
Abstract The asymptotic expressions for the gain in the free electron lasers (FELs), which operate in the strong-pump Compton regime and in the collective Raman regime, and which employ a sheet electron beam and a cylindrical electron beam, are presented.
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Diffraction Losses of a Dielectric Open Resonator

Journal of Russian Laser Research, 2023
Alexei V. Popov, Marina N. Popova
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Babinet principle and diffraction losses in laser resonators

Quantum Electronics, 2000
A simple analytical technique, based on the Babinet principle, for calculating low diffraction losses of different kinds in stable resonators is described. The technique was verified by comparison with the known numerical and analytical calculations of the losses in specific diffraction problems.
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An approximate analysis of the diffraction losses in corner reflectors

Moscow University Physics Bulletin, 2007
The fundamental mechanism of energy loss from a Gaussian beam scattered by the edge of a corner reflector is considered. An independent calculation is performed to estimate the relative losses for different polarizations with allowance for the Goos-Hanchen shift effect.
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To the question about the diffraction losses into the powerful orotrons

Twenty Seventh International Conference on Infrared and Millimeter Waves, 2003
The question is considered about the "dynamic" diffraction losses of electromagnetic energy from the open resonator (OR) of a powerful orotron. These losses are connected with radiation of the bunching electron beam at the effective electron-wave interaction with first space harmonic of the periodic orotron structure at excitement of the main type ...
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Measurement of the Ultrasonic Diffraction Loss for Circular Transducers

The Journal of the Acoustical Society of America, 1974
For the determination of the radiated power of ultrasonic diagnostic equipment transducer calibrations in the megahertz frequency range are of special interest. To minimize the sound attenuation corrections and the orientation adjustment problems, calibrations are performed expediently in the nearfield using the self-reciprocity technique.
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Enhanced procedure for double diffraction losses assessment

2000
Deygout's method is one of the most frequently used approximate method for calculating multiple diffraction losses, but calculated losses are, in general, overestimated. This is especially obvious when there are two obstacles relatively close to each other, and with relatively equal highs.
Blažević, Zoran, Zanchi, Igor, Marinović, Ivan   +2 more
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