Results 211 to 220 of about 1,437,991 (290)
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Journal of Applied Physics, 1970
The theory for an asymmetric Langmuir probe is developed for the case of a collisionless streaming high-density (ai>Rp>30λd) plasma with Ti<Te. The results are used to analyze the response of the probe to a mildly turbulent drifting plasma.
Martin Hudis, L. M. Lidsky
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The theory for an asymmetric Langmuir probe is developed for the case of a collisionless streaming high-density (ai>Rp>30λd) plasma with Ti<Te. The results are used to analyze the response of the probe to a mildly turbulent drifting plasma.
Martin Hudis, L. M. Lidsky
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Langmuir probe without RF compensation
Plasma Sources Science and Technology, 2022Abstract Langmuir probes with RF compensation are used for measurements of electron concentration, electron temperature and the DC value of plasma potential in RF discharges. In order to obtain all the RF components of plasma potential, simple probes without RF compensation are used.
P Dvořák +3 more
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High-speed dual Langmuir probe
Review of Scientific Instruments, 2010In an effort to temporally resolve the electron density, electron temperature, and plasma potential for turbulent plasma discharges, a unique high-speed dual Langmuir probe (HDLP) has been developed. A traditional single Langmuir probe of cylindrical geometry (exposed to the plasma) is swept simultaneously with a nearby capacitance and noise ...
Robert B, Lobbia, Alec D, Gallimore
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IEEE Transactions on Aerospace and Electronic Systems, 2019
In this paper, we present the CubeSat version of a scientific instrument called the multi-Needle Langmuir Probe (m-NLP). The m-NLP instrument measures the electron density in the ionosphere with kHz sampling rate, yielding meter scale resolution on low ...
T. A. Bekkeng +5 more
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In this paper, we present the CubeSat version of a scientific instrument called the multi-Needle Langmuir Probe (m-NLP). The m-NLP instrument measures the electron density in the ionosphere with kHz sampling rate, yielding meter scale resolution on low ...
T. A. Bekkeng +5 more
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Review of Scientific Instruments, 2019
We developed a new experimental approach to characterize the plasma behavior inside Hall thrusters. The main novelty of the developed approach regards the combination of a triple Langmuir probe, which guarantees a high flexibility, and Bayesian data ...
M. Saravia, A. Giacobbe, T. Andreussi
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We developed a new experimental approach to characterize the plasma behavior inside Hall thrusters. The main novelty of the developed approach regards the combination of a triple Langmuir probe, which guarantees a high flexibility, and Bayesian data ...
M. Saravia, A. Giacobbe, T. Andreussi
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Review of Scientific Instruments, 1993
A contamination-free Langmuir probe of novel design is described. Surface contaminants, which lead to erroneous evaluation of plasma parameters by distortion of the probe’s current-voltage characteristic, are removed by the indirect heating of the probe tip with separate heating elements running parallel to the probe wire in multibore alumina tubing ...
W. E. Amatucci +4 more
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A contamination-free Langmuir probe of novel design is described. Surface contaminants, which lead to erroneous evaluation of plasma parameters by distortion of the probe’s current-voltage characteristic, are removed by the indirect heating of the probe tip with separate heating elements running parallel to the probe wire in multibore alumina tubing ...
W. E. Amatucci +4 more
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Radio frequency-compensated Langmuir probe with auxiliary double probes
Review of Scientific Instruments, 2010A radio frequency (rf) compensation design using auxiliary double probes connected in parallel with a main measurement probe was developed for Langmuir probe diagnostics. This probe structure can reduce the sheath impedance of the main probe. In our probe design, the sheath capacitance of the probe can be increased and its sheath resistance can be ...
Se-Jin, Oh +2 more
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Langmuir probe diagnosis of turbulent plasmas.
AIAA Journal, 1965This paper analyzes the response of Langmuir probes to periodic or random fluctuations in plasmas with the specific aim of developing methods for measuring statistical properties of unsteady or turbulent electron-rich gases. Beginning with the classical theory of Langmuir and Mott-Smith for the probe steady-state characteristics, the waveform ...
A. DEMETRIADES, E. DOUGHMAN
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Comparison between RF probe and langmuir probe measurements
Physics Letters A, 1967Abstract A new r.f. probe method for determining electron density is described and compared with Langmuir probe measurements.
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Modulated Langmuir Probe Characteristics
Journal of Applied Physics, 1963The presence of fluctuations in the discharge parameters introduces errors into Langmuir probe measurements. Previous work by Garscadden and Emeleus considered the effects of fluctuations in the individual parameters. In this paper a generalized small-amplitude theory of the effects of these fluctuations is given and also a large signal theory for ...
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