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Higher-Harmonic Oscillation of Peniotron
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Higher order harmonics of modulational instability [PDF]
Physical Review E, 2005 We study the higher order harmonics of scalar modulational instability in the regime where it arises spontaneously through amplification of vacuum fluctuations. We obtain detailed predictions concerning the detunings, intensities, growth rates, and spectral widths of the harmonics. These predictions are well verified by experimental results obtained by
Amans, David +2 more
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Free Electron Laser on Higher Harmonics
Topical Meeting on Free Electron Generation of Extreme Ultraviolet Coherent Radiation, 1983The main goal of FEL experiments, both with recirculating and non recirculating machines, is to reach a stable oscillator by adding two mirrors at the ends of the undulator to form an optical cavity. In any case, it is necessary to achieve enough gain in order to overcome losses due essentially to end mirrors absorptions.
R. Barbini, G. Vignola
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
Abstract Lasing at short wavelengths with an accelerator of modest energy can be achieved only with a wiggler of short period and high field, operating, perhaps, at a high harmonic of the fundamental frequency. We discuss the characteristics of wigglers of this kind, designed to lase with harmonic numbers as large as 50 or so, emphasizing their gain,
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Abstract Lasing at short wavelengths with an accelerator of modest energy can be achieved only with a wiggler of short period and high field, operating, perhaps, at a high harmonic of the fundamental frequency. We discuss the characteristics of wigglers of this kind, designed to lase with harmonic numbers as large as 50 or so, emphasizing their gain,
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On the evaluation of higher harmonics in nearly sinusoidal oscillators
International Journal of Circuit Theory and Applications, 1993AbstractAn approximation method for calculating the periodic oscillations of nearly sinusoidal oscillators is presented which is based upon the classical pertubation method. Both the frequency and the amplitude of the harmonics of the oscillation are calculated to a first approximation by very simple relations which are useful for deriving a design ...
BUONOMO, Antonio, DI BELLO C, GRECO O.
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SYNCHRONIZATION OF HIGHER HARMONICS IN COUPLED ORGAN PIPES
International Journal of Bifurcation and Chaos, 2007We report results on the synchronization of two organ pipes positioned side by side. Special attention is put on the synchronization of the higher harmonics. As possible explanation, classical theory provides the amplitude death as explanation for the reduction to almost silence of two coupled organ pipes.
M. Abel, S. Bergweiler
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Higher Harmonic Control A Historical Perspective
Proceedings of the Vertical Flight Society 74th Annual Forum and Technology Display, 2018Higher Harmonic Control (HHC) is an approach for achieving reduced helicopter vibration by controlling the vibratory rotor airloads in such a way that the fuselage excitation is minimized. This paper is a historical look at how a program aimed at helicopter vibration reduction started as an outgrowth of fixed wing flutter suppression at NASA Langley ...
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Higher‐harmonic atomic force microscopy
Surface and Interface Analysis, 2006Abstract To maximize the spatial resolution of atomic force microscopy (AFM), it is helpful to isolate the spurious short‐range components from the plethora of force contributions acting between AFM tips and samples.
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