Advances in Electrostatic Dust Detection on Remote Surfaces

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The inventory of dust in next-step magnetic fusion devices will be regulated for safety reasons, however diagnostics to measure in-vessel dust are still in their infancy. Advances in dust particle detection on remote surfaces are reported. Two grids of interlocking circuit traces with spacing in the range 125 mu m to 25 mu m are biased to 30 V. Impinging dust creates a short circuit and the result current pulse is recorded. The detector response was measured with particles scraped from a carbon fiber composite tile and sorted by size category. The finest 25 mu m grid showed a sensitivity ... continued below

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Voinier, C.; Skinner, C. H. & Roquemore, A. L. February 9, 2005.

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The inventory of dust in next-step magnetic fusion devices will be regulated for safety reasons, however diagnostics to measure in-vessel dust are still in their infancy. Advances in dust particle detection on remote surfaces are reported. Two grids of interlocking circuit traces with spacing in the range 125 mu m to 25 mu m are biased to 30 V. Impinging dust creates a short circuit and the result current pulse is recorded. The detector response was measured with particles scraped from a carbon fiber composite tile and sorted by size category. The finest 25 mu m grid showed a sensitivity more than an order of magnitude higher than the 125 mu m grid. The response to the finest particle categories (5 –30 mu m) was two orders of magnitude higher than the largest (125 –250 mu m) category. Longer duration current pulses were observed from the coarser particles. The results indicate a detection threshold for fine particles below 1 mu g/cm^2.

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824 Kilobytes

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  • Report No.: PPPL-4049
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/836832 | External Link
  • Office of Scientific & Technical Information Report Number: 836832
  • Archival Resource Key: ark:/67531/metadc784754

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 9, 2005

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 15, 2016, 7:54 p.m.

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Voinier, C.; Skinner, C. H. & Roquemore, A. L. Advances in Electrostatic Dust Detection on Remote Surfaces, report, February 9, 2005; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc784754/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.