English

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Etymology

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pre- +‎ sheath

Noun

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presheath (plural presheaths)

  1. A region in advance of a sheath
    • 2015, Benjamin T. Yee, Brett Scheiner, Scott D. Baalrud, Edward V. Barnat, Matthew M. Hopkins, “Electron Sheaths: The Outsized Influence of Positive Boundaries on Plasmas”, in arXiv[1]:
      Instead, a long presheath region extends into the plasma where electrons are accelerated via a pressure gradient to a flow speed exceeding the electron thermal speed at the sheath edge.

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