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  Pulsed dye laser diagnostics of vacuum arc cathode spots

Anders, A., Anders, S., Jüttner, B., Bütticher, W., Lück, H., & Schroder, G. (1992). Pulsed dye laser diagnostics of vacuum arc cathode spots. IEEE Transactions on Plasma Science, 20(4), 466-472. doi:10.1109/27.256775.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-CAB9-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-CABA-8
Genre: Journal Article

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 Creators:
Anders, A.1, Author
Anders, S.1, Author
Jüttner, B.1, Author
Bütticher, W.1, Author
Lück, H.2, Author              
Schroder, G.1, Author
Affiliations:
1External Organizations, escidoc:persistent22              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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 Abstract: The ignition and arc phases of vacuum arcs were investigated using differential dye laser absorption photography with simultaneous high spatial (micrometer) and temporal (nanosecond) resolution. The discharge duration was 800 ns, the current 50-150 A, the electrode material copper, and the cathode-anode distance less than 50 μm. A 0.4 ns laser pulse (tunable, γ=480-530 nm) was used to obtain momentary absorption photographs of the cathode region. During ignition, an optically thick anode plasma expanded toward the cathode, decaying within 25 ns after bridging the electrode gap. In the arc phase, a fragmentary structure of the cathode spots was observed in situ for the first time. The microspots have a characteristic size of 5-10 μm. They appear and disappear on a nanosecond time scale. The plasma density of the microspots was estimated to be greater than (3-6)×1026 m-3

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Language(s): eng - English
 Dates: 1992-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1109/27.256775
 Degree: -

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Title: IEEE Transactions on Plasma Science
Source Genre: Journal
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Publ. Info: New York : Institute of Electrical and Electronics Engineers.
Pages: - Volume / Issue: 20 (4) Sequence Number: - Start / End Page: 466 - 472 Identifier: ISSN: 0093-3813
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925463189