Spectroscopic Investigation of a Cu—Cr Vacuum Arc

Methling, Ralf; Gorchakov, Sergey; Lisnyak, Marina; Franke, Steffen; Khakpour, Alireza; Попов, С. А.; Batrakov, A. V.; Uhrlandt, Dirk; Weltmann, Klaus‐Dieter

doi:10.1109/tps.2015.2443856

Cited by 41 publications

(12 citation statements)

References 21 publications

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“…Figure 11 shows the experimental setup. A model vacuum switch [28] was used. The pressure in the vacuum chamber was typically about 10 −6 Pa. An AC current waveform at approximately 50 Hz was provided by a high-current generator.…”

Section: Methodsmentioning

confidence: 99%

Numerical simulation and experimental investigation of transient anode surface temperature in vacuum arc

Yang¹,

Wang²,

Gortschakow³

2021

J. Phys. D: Appl. Phys.

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In this paper, the spatial-temporal evolution of the anode temperature in the vacuum arc during the formation of an anode spot is investigated by numerical simulation and experiments. A transient self-consistent model is established to calculate the arc parameters and the anode temperature. The simulations predict that the maximum anode temperature always occurs after the current peak. Ion density and atom density at the anode side increase significantly during the formation of the anode spot. In the anode spot mode, more evaporated anode material comes into the arc column, leading to higher plasma temperature around the spot. The anode vapor can reduce the energy flux from the plasma to the anode center, providing more uniform anode temperature distribution and correspondingly smoother plasma parameter distributions in the vicinity of the anode center. In addition, a higher Cr fraction in the electrodes can result in a higher anode temperature. Near-infrared spectroscopy and high-speed camera thermography are used to study the anode temperature experimentally in order to verify the simulation results. A reasonable agreement was found.

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Section: Methodsmentioning

confidence: 99%

Numerical simulation and experimental investigation of transient anode surface temperature in vacuum arc

Yang¹,

Wang²,

Gortschakow³

2021

J. Phys. D: Appl. Phys.

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“…The observation of lines with and without reabsorption dips (figure 3) prevents us from applying simple methods like the Boltzmann plot [22] or the Bartels methods [23], which have been developed for optically thin and thick plasmas, respectively. Instead, we apply the fitting procedure described in [7] for Cu-dominated arc, and applied successfully to other types of plasmas [18,24]. The basic idea of this method is to compute the emission spectra of the arc starting from assumed temperature and pressure profiles, and to optimize to the profiles that reproduce the best measured spectra [18].…”

Section: Temperature-dependence Of the Stark Shiftmentioning

confidence: 99%

Stark shift measurement as a temperature diagnostic of Cu-dominated thermal plasmas

Corfdir¹,

Lantz²,

Abplanalp³

et al. 2019

J. Phys. D: Appl. Phys.

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We investigate the temperature-dependence of the light emission properties of Cu-dominated plasmas with pressures in the order of 1 bar and for currents between 0 and 2 kA. While the wavelength of Cu I 3d 9 4s5s transitions for currents above 1 kA is essentially constant, a 0.1 nm Stark blueshift is observed with decreasing current from 1 kA to zero. Using a lineshape analysis of the light emission spectra, which is based on solving a one-dimensional radiative transfer equation along the line-of-sight across the arc, we show that the transition wavelength increases linearly with temperatures in the 5000-10 000 K range. Based on this observation, we propose a simple method for the temperature diagnostic of plasmas that neither requires an absolute calibration of the intensity of the detected signal, nor complex simulation tools.

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“…In paper [4] the spatially resolved optical emission spectroscopy was used to study plasma parameters of high-current vacuum arcs between Cu-Cr contacts. It was found that the plasma layer in front of the anode is not in local thermal equilibrium (LTE).…”

Section: Introductionmentioning

confidence: 99%

Thermal Plasma of Electric Arc Discharge Between Cu-Cr Composite Electrodes

Veklich

Boretskij

Kleshych

et al. 2019

PPT

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This work deals with investigations of model plasma source realised as electric arc discharge in gas atmosphere between Cu-Cr composite electrodes. Radial distributions of temperature and electron density in arc plasma column were studied by optical emission spectroscopy. The content of electrode metals' vapours in discharge was calculated on the base of experimentally obtained plasma parameters as initial data. So, in this way the erosion properties of such composition can be determined.

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Spectroscopic Investigation of a Cu—Cr Vacuum Arc

Cited by 41 publications

References 21 publications

Numerical simulation and experimental investigation of transient anode surface temperature in vacuum arc

Numerical simulation and experimental investigation of transient anode surface temperature in vacuum arc

Stark shift measurement as a temperature diagnostic of Cu-dominated thermal plasmas

Thermal Plasma of Electric Arc Discharge Between Cu-Cr Composite Electrodes

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