Material-dependent high-frequency current fluctuations of cathodicvacuum arcs: Evidence for the ecton cutoff of the fractal model

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Current fluctuations of cathodic arcs were recorded withhigh analog bandwidth (up to 1 GHz) and fast digital sampling (up to 5Gsamples/sec). The power spectral density of the arc current wasdetermined by fast Fourier transform clearly showing material dependent,non-linear features in the frequency domain. These features can beassociated with the non-linear impedance of the conducting channelbetween cathode and anode, driven by the explosive nature of electronemission and plasma formation. The characteristic times of less than 100ns can be associated with individual explosive processes, "ectons," andtherefore represent the short-time physical cutoff for the fractal modelof cathodic arcs.

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Anders, Andre & Oks, Efim December 22, 2005.

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Current fluctuations of cathodic arcs were recorded withhigh analog bandwidth (up to 1 GHz) and fast digital sampling (up to 5Gsamples/sec). The power spectral density of the arc current wasdetermined by fast Fourier transform clearly showing material dependent,non-linear features in the frequency domain. These features can beassociated with the non-linear impedance of the conducting channelbetween cathode and anode, driven by the explosive nature of electronemission and plasma formation. The characteristic times of less than 100ns can be associated with individual explosive processes, "ectons," andtherefore represent the short-time physical cutoff for the fractal modelof cathodic arcs.

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  • Journal Name: Journal of Applied Physics; Journal Volume: 99; Journal Issue: 10; Related Information: Journal Publication Date: May 2006

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  • Report No.: LBNL--59251
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 889246
  • Archival Resource Key: ark:/67531/metadc884601

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  • December 22, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 29, 2016, 8:56 p.m.

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Anders, Andre & Oks, Efim. Material-dependent high-frequency current fluctuations of cathodicvacuum arcs: Evidence for the ecton cutoff of the fractal model, article, December 22, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc884601/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.