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Title: Robust dynamic mitigation of instabilities

Abstract

A dynamic mitigation mechanism for instability growth was proposed and discussed in the paper [S. Kawata, Phys. Plasmas 19, 024503 (2012)]. In the present paper, the robustness of the dynamic instability mitigation mechanism is discussed further. The results presented here show that the mechanism of the dynamic instability mitigation is rather robust against changes in the phase, the amplitude, and the wavelength of the wobbling perturbation applied. Generally, instability would emerge from the perturbation of the physical quantity. Normally, the perturbation phase is unknown so that the instability growth rate is discussed. However, if the perturbation phase is known, the instability growth can be controlled by a superposition of perturbations imposed actively: If the perturbation is induced by, for example, a driving beam axis oscillation or wobbling, the perturbation phase could be controlled, and the instability growth is mitigated by the superposition of the growing perturbations.

Authors:
;  [1]
  1. Graduate School of Engineering, Utsunomiya University, 321-8585 Utsunomiya (Japan)
Publication Date:
OSTI Identifier:
22408290
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; BEAMS; DISTURBANCES; DYNAMICS; INSTABILITY GROWTH RATES; MITIGATION; OSCILLATIONS; WAVELENGTHS

Citation Formats

Kawata, S., and Karino, T. Robust dynamic mitigation of instabilities. United States: N. p., 2015. Web. doi:10.1063/1.4917340.
Kawata, S., & Karino, T. Robust dynamic mitigation of instabilities. United States. https://doi.org/10.1063/1.4917340
Kawata, S., and Karino, T. 2015. "Robust dynamic mitigation of instabilities". United States. https://doi.org/10.1063/1.4917340.
@article{osti_22408290,
title = {Robust dynamic mitigation of instabilities},
author = {Kawata, S. and Karino, T.},
abstractNote = {A dynamic mitigation mechanism for instability growth was proposed and discussed in the paper [S. Kawata, Phys. Plasmas 19, 024503 (2012)]. In the present paper, the robustness of the dynamic instability mitigation mechanism is discussed further. The results presented here show that the mechanism of the dynamic instability mitigation is rather robust against changes in the phase, the amplitude, and the wavelength of the wobbling perturbation applied. Generally, instability would emerge from the perturbation of the physical quantity. Normally, the perturbation phase is unknown so that the instability growth rate is discussed. However, if the perturbation phase is known, the instability growth can be controlled by a superposition of perturbations imposed actively: If the perturbation is induced by, for example, a driving beam axis oscillation or wobbling, the perturbation phase could be controlled, and the instability growth is mitigated by the superposition of the growing perturbations.},
doi = {10.1063/1.4917340},
url = {https://www.osti.gov/biblio/22408290}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 22,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}