Two-fluid analysis of dimensionally similar discharges

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The concept of dimensionless scaling introduces the possibility of determining the required size for a fusion reactor based on data from a single machine. Specifically, all dimensionless quantities other than the normalized gyroradius {rho}* can be simultaneously matched to reactor values in present-day tokamaks. Experiments on DIII-D show that the electrons and ions have distinct {rho}* scalings--for electrons {chi} {proportional_to} {rho}*, while {chi} {proportional_to} {rho}*{sup {minus}1/2} for ions. This observation can unify previous results based on single-fluid analysis, and, in addition, illustrates the danger of using such analysis to extrapolate to a reactor. The {rho}* scaling, coupled with technological limits ... continued below

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12 p.

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Luce, T.C. & Petty, C.C. December 1, 1994.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • General Atomic Company
    Publisher Info: General Atomics, San Diego, CA (United States)
    Place of Publication: San Diego, California

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Description

The concept of dimensionless scaling introduces the possibility of determining the required size for a fusion reactor based on data from a single machine. Specifically, all dimensionless quantities other than the normalized gyroradius {rho}* can be simultaneously matched to reactor values in present-day tokamaks. Experiments on DIII-D show that the electrons and ions have distinct {rho}* scalings--for electrons {chi} {proportional_to} {rho}*, while {chi} {proportional_to} {rho}*{sup {minus}1/2} for ions. This observation can unify previous results based on single-fluid analysis, and, in addition, illustrates the danger of using such analysis to extrapolate to a reactor. The {rho}* scaling, coupled with technological limits on the magnetic field strength, determines the minimum size for a reactor. If these {rho}* scalings found on DIII-D hold under reactor-relevant conditions, the confinement will scale unfavorably as {rho}* is reduced to the values expected in a reactor.

Physical Description

12 p.

Notes

INIS; OSTI as DE95004961

Source

  • Correlation between experiment and theory in magnetic confinement systems, GOETEBORG (Sweden), 13-16 Jun 1994

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  • Other: DE95004961
  • Report No.: GA-A--21733
  • Report No.: CONF-9406328--1
  • Grant Number: AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 64223
  • Archival Resource Key: ark:/67531/metadc694641

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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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  • December 1, 1994

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 18, 2016, 6:09 p.m.

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Luce, T.C. & Petty, C.C. Two-fluid analysis of dimensionally similar discharges, article, December 1, 1994; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc694641/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.