3 edition of High-frequency instability of the sheath-plasma resonance found in the catalog.
High-frequency instability of the sheath-plasma resonance
|Other titles||High frequency instability of the sheath plasma resonance.|
|Series||NASA CR -- 186127., NASA contractor report -- NASA CR-186127.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
The Collisionless Sheath / The Bohm Sheath Criterion / Plasma Requirements / The Presheath / Sheath Potential at a Floating Wall / Collisional Sheaths / Simulation Results / The High-Voltage Sheath / Matrix Sheath / Child Law Sheath / Generalized Criteria for Sheath Formation / High-frequency instability of the sheath-plasma resonance [microform] / R.L. Stenzel Heatsealing and high-frequency welding of plastics / with a foreword by Henri Leduo A high-frequency servosystem for fuel control in hypersonic engines [microform] / Donald L. Simon
action of energetic sheath electrons with thermal bulk plasma electrons drives a two-stream instability also dissipating power in the plasma. Index Terms—Capacitively coupled plasmas, electric ﬁeld re-versal, phase resolved optical emission spectroscopy, plasma diag-nostics, plasma ionization, radio-frequency plasmas, wave-particle ?doi=&rep=rep1&type=pdf. The chapter discusses the evolution of Rayleigh-Taylor instability (RTI) in ordinary fluids and in a plasma fluid. RT instability exits in many situations from overturn of the outer portion of the collapsed core of a massive star to laser implosion of deuterium-tritium fusion targets. In the mixture of fluids, the instability is triggered by the gravitational force acting on an inverted /dynamics-of-rayleigh-taylor-instability-in-plasma-fluids.
high frequency electromagnetic signals propagating in the earth ionosphere, inside a plasma sheath of reentry and hypersonic vehicles and in many other applications. We will discuss generation of low frequency density irregularities due to the presence of plasma flows with velocity shear and interchange instability. 1. Introduction The The high frequency operation with ω ≫ ω pi = ion plasma frequency is able to avoid the formation of large RF sheath potentials as well as the resulting surface bombardment, and eventually destruction, by the energetic ions .
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A study of the instability of the sheath plasma resonance in the electron plasma frequency range was made by Stenzel 9, 10 in detail. The instability in this case is excited due to negative radio Coherent high-frequency oscillations near the electron plasma frequency (ω≲ω p) are generated by electrodes with positive dc bias immersed in a uniform Maxwellian afterglow plasma.
The instability occurs at the sheath-plasma resonance and is driven by a negative rf sheath resistance associated with the electron inertia in the diodelike electron-rich :// S/abstract. Coherent high‐frequency oscillations near the electron plasma frequency (ω≲ω p) are generated by electrodes with positive dc bias immersed in a uniform Maxwellian afterglow plasma.
The instability occurs at the sheath–plasma resonance and is driven by a negative rf sheath resistance associated with the electron inertia in the diodelike electron‐rich :// Coherent high frequency oscillations near the electron plasma frequency (omega approx.
less than omega sub p) are generated by electrodes with positive dc bias immersed in a uniform Maxwellian afterglow plasma.
The instability occurs at the sheath-plasma resonance and is driven by a negative RF sheath resistance associated with the electron Get this from a library. High-frequency instability of the sheath-plasma resonance. [R L Stenzel; United States. National Aeronautics and Space Administration.] The instability occurs at the sheath-plasma resonance and is driven by a negative RF sheath resistance associated with the electron inertia in the diodelike electron-rich sheath.
With increasing dc bias, i.e., electron transit time, the instability exhibits a hard threshold, downward frequency pulling, line broadening, and copious :// Coherent high frequency oscillations near the electron plasma frequency (omega approx.
less than omega sub p) are generated by electrodes with positive dc bias immersed in a uniform Maxwellian afterglow plasma. The instability occurs at the sheath-plasma resonance and is driven by a negative RF sheath resistance associated with the electron inertia in the diode-like electron-rich :// UCLA BPPL - Sheath-Plasma Instability Coherent high-frequency oscillations near the electron plasma frequency The instability occurs at the sheath-plasma resonance and is driven by the negative differential resistance of the rf sheath associated with electron inertia.
It resembles the monotron oscillations in diodes analyzed by Fig. Ion sheath oscillations appearing in the parametric instability of the high-frequency sheath-plasma resonance.
(a) Sidebands of the pump and the decay spectra with lines spaced by the ion plasma frequency. (b) Multiple sidebands created by a strong pump wave. In time the sheath-plasma oscillation consists of pulsating rf &Instabilities/ParametricInstab/.
Beam–Plasma Instability. The nonlinear behavior of a plasma containing a small high-energy electron beam has been studied theoretically by Drummond & Pines (b) and Vedenov et al.
() and for the case of a monoenergetic beam by Shapiro (). instability has been identiﬁed as a sheath–plasma instability.
Electron inertia creates a phase shift between high-frequency current and electric ﬁelds which destabilizes the sheath–plasma Drift resonance in high density non-neutral plasmas This instability of a near-Brillouin sheath is not surprising density electron plasmas where the plasma frequency is much smaller than the electron cyclotron frequency, With regard to our cold-ﬂuid approach, it needs to be noted Journal Article: Electron-rich sheath dynamics.
Transient currents and sheath-plasma instabilities In this post, we will see the book Plasma Physics edited by B. Kadomtsev. About the book This collection contains articles both original and already published in the Soviet Union inwritten by well-known Soviet scientists and devoted to the most important findings and achievements of research into the fundamental problems of plasma Coherent high-frequency osclllatlons near the electron plasma frequency (o plasma.
The instability occurs at the sheath-plasma resonance and ls driven by a negatlve rf sheath Self-excited plasma series resonances (PSR) are observed in capacitve discharges as high-frequency oscillations superimposed on the normal rf current. This high-frequency contribution to the current is generated by a series resonance between the capacitive sheath and the inductive and ohmic bulk of the plasma.
The nonlinearity of the sheath leads to a complex :// that the sheath dynamics appropriate to the resonance instability may appear just during the period when the plasma and sheath are nonstationary. This led us to find a general condition for the existence of a resonance and its stability near ω i.
APPARATUS DESCRIPTION The setup of the experimental apparatus is shown in Fig. ?doi=&rep=rep1&type=pdf. An illustration of an open book. Books. An illustration of two cells of a film strip.
Video. An illustration of an audio speaker. Audio An illustration of a " floppy disk. DTIC ADA Low Frequency Plasma Turbulence as a Source of Clutter in Surveillance and Communication (Postprint) During ion cyclotron resonance heating, the sheath power dissipation caused by ion acceleration in the radio frequency (RF) sheath is one of the main causes of RF power loss in the tokamak edge region.
To estimate the power dissipation of an RF sheath in the ion cyclotron range of frequency (ICRF), a 1D fluid model for the multi-component High frequency processes in the sheath-plasma, which occur in the vicinity of the local plasma frequency, have been widely studied in laboratory experiments5, In Ref.
14 a new kind of low-frequency (lower than the ion plasma frequency) instability has been observed in the sheath-plasma, containing an accelerated ion. Ion oscillations are damped by an external r.f. electric field when the condition of sheath-plasma resonance is :// X-band microwave generation caused by plasma-sheath instability Y.
Bliokh, J. Felsteiner and Ya.Z. Slutsker Department of Physics, Technion, Haifa, Israel Abstract It is well known that oscillations at the electron plasma frequency may appear due to instability of the plasma sheath near a positively biased electrode immersed in :// within the plasma sheath formed above the lower electrode of a capacitively-coupled rf discharge frequency of modes (7) and (8) spread over all mode numbers, while a much fainter an eight-particle chain at the second resonance instability.
As shown in Figs. 6 (a) and (b), the