Numerical Simulation of Low-Current Vacuum Arc Plasma Jet in Strong Axial Magnetic Field

Shmelev, D. L.; Uimanov, I. V.; Frolova, V. P.

doi:10.1109/deiv.2018.8537133

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…At the cathode side, ions emitted from the cathode include Cr 2+ , Cu 1+ , and Cu 2+ so that the average charge number here is 2 for Cr and 1.85 for Cu. The erosion due to evaporation is set to 10% of the ion erosion [23]. At the anode side, only Cr atoms and Cu atoms are generated due to the anode evaporation, forming a neutral atom vapor area (NAVA) in front of the anode.…”

Section: Physical Modelmentioning

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: Physical Modelmentioning

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 initial charge composition of copper is 28% Cu 1+ , 54% Cu 2+ and 18% Cu 3+ . At the same time, it is believed that the cathode spot will also evaporate atoms, the density of which is assumed to be 10% of ion erosion [18].…”

Section: Physical and Mathematical Modelmentioning

confidence: 99%

Numerical simulation of low-current vacuum arc jet considering anode evaporation in different axial magnetic fields

Zhang¹,

Wang²,

Yang³

et al. 2022

Plasma Sci. Technol.

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As the main source of the vacuum arc plasma, cathode spots (CSs) play an important role on the behaviors of the vacuum arc. Their characteristics are affected by many factors, especially by the magnetic field. In this paper, the characteristics of the plasma jet from a single CS in vacuum arc under external axial magnetic field (AMF) are studied. A multi-species magneto-hydro-dynamic (MHD) model is established to describe the vacuum arc. The anode temperature is calculated by the anode activity model based on the energy flux obtained from the MHD model. The simulation results indicate that the external AMF has a significant effect on the characteristic of the plasma jet. When the external AMF is high enough, a bright spot appears on the anode surface. This is because with a higher AMF, the contraction of the diffused arc becomes more obvious, leading to a higher energy flux to the anode and thus a higher anode temperature. Then more secondary plasma can be generated near the anode, and the brightness of the ‘anode spot’ increases. During this process, the arc appearance gradually changes from a cone to a dumbbell shape. The appearance of the plasma jet calculated in the model is consistent with the experimental results.

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“…

field (AMF) has been proved to have an influence on both the positive ions in the vacuum arc plasma and the plasmaplume overlap region between contacts. The application of the AMF can make the vacuum arc column controlled effectively, which can reform the distribution of the energy flux of the vacuum arcs [4][5][6][7][8][9][10][11][12].The current density can reveal the energy flux density distribution and the constricted characteristics of the vacuum arcs. Therefore, much attention has been taken on the determination

…”

mentioning

confidence: 99%

“…field (AMF) has been proved to have an influence on both the positive ions in the vacuum arc plasma and the plasmaplume overlap region between contacts. The application of the AMF can make the vacuum arc column controlled effectively, which can reform the distribution of the energy flux of the vacuum arcs [4][5][6][7][8][9][10][11][12].…”

mentioning

confidence: 99%

Effect of six pure metals cathode on constricted characteristics of high-current vacuum arcs subject to axial magnetic field

Ma¹,

Zhang²,

Liu³

et al. 2019

J. Phys. D: Appl. Phys.

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Numerical Simulation of Low-Current Vacuum Arc Plasma Jet in Strong Axial Magnetic Field

Cited by 3 publications

References 10 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

Numerical simulation of low-current vacuum arc jet considering anode evaporation in different axial magnetic fields

Effect of six pure metals cathode on constricted characteristics of high-current vacuum arcs subject to axial magnetic field

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