Measurements of electron heat flow along a dc magnetic field in strong temperature gradients

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Measurements of electron heat flow parallel to B are performed on a fully -ionized quiescent plasma column under conditions for which the electron-electron collisional mean free path, l/sub ee/, is not small relative to the electron temperature-gradient scale-length. Pulsed microwave heating at one location on the column and nonperturbing microwave resonator measurements of temperature at two locations on the column are used to create and to measure the heat flow. Results are compared with the predictions of a 1-D heat diffusion code that has a parameter, ..cap alpha.., multiplying the Spitzer heat conductivity coefficient, and that also has provision for ... continued below

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Pages: 11

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Massey, R.S.; Ingraham, J.C.; Wright, B.L. & Dreicer, H. January 1, 1980.

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Measurements of electron heat flow parallel to B are performed on a fully -ionized quiescent plasma column under conditions for which the electron-electron collisional mean free path, l/sub ee/, is not small relative to the electron temperature-gradient scale-length. Pulsed microwave heating at one location on the column and nonperturbing microwave resonator measurements of temperature at two locations on the column are used to create and to measure the heat flow. Results are compared with the predictions of a 1-D heat diffusion code that has a parameter, ..cap alpha.., multiplying the Spitzer heat conductivity coefficient, and that also has provision for limiting the heat flux to q/sub L/ = ..beta..nkT ..sqrt..kt/m (where ..beta.. is an adjustable parameter) in order to model the transition to larger values of (l/sub ee/T)dT/dx/.

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Pages: 11

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NTIS, PC A02/MF A01.

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  • International symposium on physics and open-ended fusion systems, Tsukuba, Japan, 15 Apr 1980

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  • Report No.: LA-UR-80-1109
  • Report No.: CONF-800441-4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5347731
  • Archival Resource Key: ark:/67531/metadc1064695

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • January 1, 1980

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • May 31, 2018, 12:22 p.m.

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Massey, R.S.; Ingraham, J.C.; Wright, B.L. & Dreicer, H. Measurements of electron heat flow along a dc magnetic field in strong temperature gradients, article, January 1, 1980; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1064695/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.