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National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Comparism of Diagnostic Methods Employing Matrix of Photodiodes and Linear Camera
 Šonský, Jiří
Both devices are composed of array of PIN photodiodes, amplifiers, multiplexer and analog-digital converter. Diferent layout of these devices lead in to diferent overall performance. Linear camera outperformed the photodiode matrix in horizontal resolution and total data rare, PIN photodiodes have higer sensivity, double line frequency and many times longer acquision time.
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Diagnostics of Breakdown in Electric Arc Exposed to External Magnetic Field
 Hlína, Jan ; Šonský, Jiří
An arc in external magnetic field acquires a helical shape and when the magnetic field exceeds a critical value the arc starts to oscillate. The oscillations may lead to many types of shortenings (breakdowns) between the adjacent windings of the arc path. We have investigated experimentally the steepness of the voltage fall reflecting the breakdown and the influence of mean arc voltage and electrode polarity on this characteristic.
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Application of Linear Camera for Plasma Jet Diagnostics
 Šonský, Jiří
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Study of Anode Attachment Behavior and Its Influence on Plasma Jet in Water-Argon Plasma Torch
 Chumak, Oleksiy ; Hrabovský, Milan ; Kopecký, Vladimír ; Konrád, Miloš
In this paper behavior of anode attachment and its effect on plasma jet in dc water-argon plasma torch was studied.Dependence of plasma jet deflection on argon flow rate and on arc current was investigated.Effect of arc current and plasma gas flow rate on position of anode attachment and on arc voltage fluctuations were studied and processes that control the position was discussed.
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Spectroscopic and Enthalpy probe Diagnostics of Fluctuating H2O-Ar Thermal Plasma Jet
 Sember, Viktor ; Kavka, Tetyana ; Kopecký, Vladimír ; Hrabovský, Milan
Time averaged OES and EP measurements of the temperature and mole fraction of entrained air in the H2O-Ar dc arc thermal plasma jet are compared.It is shown that choosing an appropriate method of evaluation of spectroscopic data may reduce the effects of fluctuations and departures from equilibrium and lead to more realistic results.The differences between OES and EP measurements.
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