Optically thin perpendicular electron-cyclotron emission from hot electrons in TMX-U

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Perpendicular electron-cyclotron emission (PECE) from relativistic (T/sub H/ approx. 100 to 400 keV) hot electrons within the thermal-barrier region of TMX-U is detected at 35, 60, 94 and 98 GHz. For the operating regime of TMX-U these signals are optically thin (tau<<1) and thus proportional to the radial hot electron line density. A relativistic code is used to calculate the theoretical temperature dependence of the perpendicular emission coefficient, j perpendicular(..omega..,T/sub H/), for each of the detected frequencies. This dependence has been verified experimentally by x-ray measurements of the hot electron temperature, T/sub H/. The observed qualitative agreement demonstrates that optically ... continued below

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Pages: 12

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James, R.A.; Lasnier, C.J. & Ellis, R.F. March 4, 1986.

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Description

Perpendicular electron-cyclotron emission (PECE) from relativistic (T/sub H/ approx. 100 to 400 keV) hot electrons within the thermal-barrier region of TMX-U is detected at 35, 60, 94 and 98 GHz. For the operating regime of TMX-U these signals are optically thin (tau<<1) and thus proportional to the radial hot electron line density. A relativistic code is used to calculate the theoretical temperature dependence of the perpendicular emission coefficient, j perpendicular(..omega..,T/sub H/), for each of the detected frequencies. This dependence has been verified experimentally by x-ray measurements of the hot electron temperature, T/sub H/. The observed qualitative agreement demonstrates that optically thin PECE signals can be used to determine the temporal evolution of T/sub H/. An inability to absolutely calibrate the present PECE waveguide system has prevented quantitative agreement.

Physical Description

Pages: 12

Notes

NTIS, PC A02/MF A01; 1.

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  • 6. topical conference on high temperature plasma diagnostics, Hilton Head Island, SC, USA, 9 Mar 1986

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  • Other: DE86008027
  • Report No.: UCRL-93882
  • Report No.: CONF-860324-11
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 6092186
  • Archival Resource Key: ark:/67531/metadc1111267

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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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Creation Date

  • March 4, 1986

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 20, 2018, 7:48 p.m.

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James, R.A.; Lasnier, C.J. & Ellis, R.F. Optically thin perpendicular electron-cyclotron emission from hot electrons in TMX-U, article, March 4, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1111267/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.