Results 21 to 30 of about 42,711 (257)

Arc Plasma Propagation and Arc Current Profiles [PDF]

IEEE Transactions on Plasma Science, 2019
When electrical arcs occur in space, a plasma expands away from the arc-site, neutralizing adjacent surfaces (a current), and causing a current to be produced at the arc-site (source of neutralization current). The speed of this plasma expansion depends on the plasma species, which in turn depend on the ionizable materials near the initial ...
Dale C. Ferguson, Ryan C. Hoffmann, Elena Plis, Daniel Engelhart   +3 more
openaire   +1 more source

Advances in inductively-coupled-plasma heaters for aerothermal testing of thermal-protection systems

Kongqi donglixue xuebao
Inductively coupled plasma (ICP) heaters generate high-enthalpy and ultra-clean plasma flows through electromagnetic coupling discharge, showing significant value in the research of thermal protection materials (TPMs) for hypersonic vehicles.
Xingying Zhu, Kai Zhou, Haiqun Chen, Rongguo Zhang, Heng Zhang   +4 more
doaj   +1 more source

Measurement of velocity and diameter of tungsten particles produced by arcing using high-speed video

Nuclear Materials and Energy
Arcing is a mechanism of dust production and erosion in fusion devices. The masses and velocities of tungsten (W) particles produced by arcing is of special interest given that W is used as wall material in current experimental devices and is planned for
Alberto Castillo Castillo, Martin Balden, Volker Rohde, Michael Laux, Peter Siemroth, Heinz Pursch, Juergen Sachtleben, Rudolf Neu   +7 more
doaj   +1 more source

Model and simulation investigation of the whole process of high-current vacuum arc burning

AIP Advances, 2021
With the development of the power industry and the increase in the capacity of power systems, vacuum switches have been developed rapidly. The distribution characteristics of the vacuum arc can reflect the working conditions of the vacuum switch.
Shuangwei Zhao, Lihua Zhao, Xiaolong Huang, Weiwei Chen, Wenjun Ning, Lijun Wang   +5 more
doaj   +1 more source

Surface Modification of Stainless Steel Using an Atmospheric Pressure Plasma Arc Driven by an External Transverse- Alternating Magnetic Field

Chemical Engineering Transactions, 2015
An experimental cleaning system for surface modification was developed. It consisted of a plasma torch with a DC power supply to generate an atmospheric pressure plasma arc, two field coils with an AC power supply to generate an external transverse ...
X.J. Dong, J.B. Meng, X.T. Wei, W.H. Liu
doaj   +1 more source

Ionization in the plasma of a copper arc

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1962
From the relative intensities of arc and spark lines observed in a d-c arc in air between copper electrodes, the degree of ionization of eleven elements added to the copper has been determined. With the aid of Saha’s ionization equation, the electron density in the arc was calculated to be 2.4×10(14) cm(−3). Partition functions for atoms and ions of 29
openaire   +1 more source

Comparison of shear bond strength of orthodontic brackets bonded with halogen and plasma arc light curing

Dental Research Journal, 2012
Background: Reduced time and appropriate bond strength of brackets is one of the most important aspects of orthodontic treatments. Prolonged halogen light curing for bonding of brackets is undesirable, so the purpose of this study was to compare the ...
Mohammad Hossein IndianJPsychiatry, Alireza Danesh Kazemi, Hossein Agha Aghili, Kazem Barzegar, Taranom Fallahtafti   +4 more
doaj   +1 more source

Comparison of Different Unconventional Thermal Energies for Steel Cutting Process

Diyala Journal of Engineering Sciences, 2013
different unconventional heat sources for material processing were discussed . The heat sources such as plasma arc, electron beam and Co2 laser were employed previously by other researchers, while " Co2laser– gas mixture" system was studied during the ...
Jasim Hassan Rasheed
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Research of a Novel Non-Axisymmetric Side-Compressed Variable Polarity Plasma Arc and Its Pressure Distribution Characteristics

Metals
In the keyhole variable polarity plasma arc weldng (VPPAW) process at horizontal position, the metal driven by gravity gathered on one side of the molten pool, and the weld formation is difficult, especially for thick workpiece welding.
Hongxing Zhao, Chunli Yang, Chenglei Fan
doaj   +1 more source