Expansion Rate Measurements at Moderate Pressure of Nonneutral Electron Plasmas in the Electron Diffusion Gauge (EDG) Experiment

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Measurements of the expansion rate of pure-electron plasmas have been performed on the Electron Diffusion Gauge (EDG) device at background helium gas pressures in the 5 x 10(superscript -8) Torr to 1 x 10(superscript -5) Torr range, where plasma expansion due to electron-neutral collisions dominates over plasma expansion due to trap asymmetries. It is found that the expansion rate, defined as the time rate of change of the particles' mean-square radius, scales approximately linearly with pressure and inversely as the square of the magnetic field strength in this regime, in agreement with classical predictions.

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299 Kilobytes pages

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Morrison, Kyle A.; Davidson, Ronald C.; Paul, Stephen F.; Belli, Emily A. & and Chao, Edward H. May 18, 2001.

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Measurements of the expansion rate of pure-electron plasmas have been performed on the Electron Diffusion Gauge (EDG) device at background helium gas pressures in the 5 x 10(superscript -8) Torr to 1 x 10(superscript -5) Torr range, where plasma expansion due to electron-neutral collisions dominates over plasma expansion due to trap asymmetries. It is found that the expansion rate, defined as the time rate of change of the particles' mean-square radius, scales approximately linearly with pressure and inversely as the square of the magnetic field strength in this regime, in agreement with classical predictions.

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299 Kilobytes pages

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INIS; OSTI as DE00784553

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  • Other Information: PBD: 18 May 2001

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  • Report No.: PPPL-3567
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/784553 | External Link
  • Office of Scientific & Technical Information Report Number: 784553
  • Archival Resource Key: ark:/67531/metadc722774

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Office of Scientific & Technical Information Technical Reports

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  • May 18, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 15, 2016, 9:08 p.m.

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Morrison, Kyle A.; Davidson, Ronald C.; Paul, Stephen F.; Belli, Emily A. & and Chao, Edward H. Expansion Rate Measurements at Moderate Pressure of Nonneutral Electron Plasmas in the Electron Diffusion Gauge (EDG) Experiment, report, May 18, 2001; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc722774/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.