Random walk of cathode arc spots in vacuum

Author: puqy

August undefined, 2024

Webb22 juli 2024 · An equation governing the evolution of the surface density of the spots or, equivalently, the distribution of macroscopic (averaged over individual spots) current … Webbof cathodic arcs in vacuum for various cathode arcs [4]. The arcs were generated in a coaxial plasma source and fluctuations of voltage during arc were recorded using a …

Space-Resolved Modeling of Stationary Spots on Copper Vacuum …

Webb10 sep. 2014 · [61] Djakov B E and Juttner B 2002 Random and directed components of arc spot motion in vacuum J. Phys. D: Appl. Phys. 35 2570–7. Crossref; Google Scholar [62] Shi Z Q, Xiao J, Jia S L, Liu Z G and Wang L J 2007 The influence of gap distance on the random walk of cathode spot in vacuum arc J. Phys. D: Appl. Phys. 40 5924–8. Crossref; … WebbThe observed vacuum arc cathode spot rotation has important implications for propulsion since the cathode spot rotation leads to a uniform cathode erosion, which is critical for … trog factors minnesota

The dynamics of arc cathode spots in vacuum: new measurements

Webb14 sep. 1983 · The theoretical basis of the random walk movement of cathode arc spots is reconsidered, and the probable causes of some discrepancies in measured spot … Webb15 nov. 2000 · The cathode spot movement of a vacuum arc with Al, Cd, Mo and Cu cathodes was investigated. Provided external disturbances are absent the cathode spot … Webb27 maj 2005 · Random walk models of cathode spot motion are well established: they go asymptotically to Brownian motion for infinitesimal step width. The power spectrum of … trog california drags

Random walk of cathode arc spots in vacuum - ResearchGate

Displacement times of arc cathode spots in vacuum IEEE …

WebbThe cathode spot, which is essential for the very existence of a vacuum arc, is the least understood of all vacuum-arc phenomena. Clearly, it is the source of electron emission … WebbThe retrograde motion of arc cathode spots in vacuum - NASA/ADS Experiments are reported on the retrograde arc spot motion on copper and tantalum cathodes in vacuum in the presence of a magnetic field. The spots are imaged with time and space resolutions of <100 ns and <10 µm, respectively. trog factorsWebbNanosecond displacement times of arc cathode spots in vacuum Abstract: With a high speed camera consisting of a combination of framing and streak channels, arc spots on a copper cathode are imaged in the spectral range 200-800 nm with spatial and time resolution of <5 μm and <10 ns, respectively. trog cave outward

"WebbThe cathode spot (CS), as the source of arc plasma, plays very important role in maintaining the burning of vacuum arc, particularly, in relatively low current with inactive … " - Random walk of cathode arc spots in vacuum

Random walk of cathode arc spots in vacuum

On the random walk of arc cathode spots in vacuum - IOPscience

Webb29 mars 2002 · Because plasma production at vacuum cathode spots is approximately proportional to the arc current, arc current modulation can be used to generate ion … WebbA first experimental validation of the evaporation-determined arc-cathode coupling (EDACC) model is performed by comparing the experimental and simulated current in the peak current phase of a pulsed gas metal arc welding process. For this, the EDACC model was extended to limit the cathode surface temperature to a realistic value of <2400 K.

Did you know?

Webb15 nov. 2000 · In this paper, a two-dimensional statistical model for a single cathode spot of vacuum arc with copper cathode has been established to simulate its random walk … WebbA: anode; C: cathode. nous spot on arc-cleaned surfaces in vacuum, exploiting the effects of spot dynamics to enhance the spatial resolu- tion of the optical measurements. II. EXPERIMENT The arc spots were ignited at the top of …

WebbThe spots move in a random manner in elementary steps of a crater radius with time constants of the order of 10 −8 s. The main reason for the movement is the formation of micropoints at crater boundaries. Droplets and contaminations induce jumps of more than a … Webb17 maj 2024 · Abstract: A model of cathode spots in high-current vacuum arcs is developed, with account of the plasma cloud left over from a previously existing spot, all …

Webb11 juni 2013 · Abstract: A self-consistent space-resolved numerical model of cathode spots in vacuum arcs is realized on the computational platform COMSOL Multiphysics. … WebbIn vacuum arc simulation, a two-temperature magneto-hydrodynamics (MHD) model is used. The same simpliﬁed arc model described in Ref. 44 is adopted, except for the …

Webb哪里可以找行业研究报告？三个皮匠报告网的最新栏目每日会更新大量报告，包括行业研究报告、市场调研报告、行业分析报告、外文报告、会议报告、招股书、白皮书、世界500强企业分析报告以及券商报告等内容的更新，通过最新栏目，大家可以快速找到自己想要的内 …

Webb14 mars 1995 · Anders A, Anders S, Hantzsche E, Jüttner B and Ziegenhagen G 1993a Optical investigation of arc cathode spots in vacuum Proc. XXIth Int. Conf. on Phenomena in Ionized Gases, Bochum vol I, pp 3-4. Google Scholar Anders A, Anders S, Jüttner B, Bötticher W, Lück H and Schröder G 1992a Pulsed dye laser diagnostics of vacuum arc … trog factors mnWebb7 jan. 1997 · Experiments are reported on the number and displacement velocity of arc spots on CuCr and Cu cathodes in the current range 40 - 1500 A. The spot number was … trog cancer researchWebb21 sep. 2007 · Arc cathode spots in vacuum with Cu cathodes have been registered by combining framing and streak channels of a fast image converter camera equipped with … trog car show