Investigation of impurity radiation from a well diganosed, laser heated plasma sample. Final report

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The results are described of an experimental and theoretical program designed to measure the relative intensities of line radiation from various ionization stages of carbon and helium impurities added to a deuterium plasma, and to relate the observed line intensity ratios to the plasma temperature. A deuterium sample plasma is produced and heated to a temperature of 2 to 7 eV at an electron density of 5 x 10/sup 16/ cm/sup -3/. The plasma parameters are monitored at various discrete times during the plasma decay using the Thomson scattering system. Simultaneously, the same sample volume is observed in the visible … continued below

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55 pages

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Crawford, E.; Quimby, D.; Hoffman, A. & Pietrzyk, Z.A. November 1, 1977.

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Description

The results are described of an experimental and theoretical program designed to measure the relative intensities of line radiation from various ionization stages of carbon and helium impurities added to a deuterium plasma, and to relate the observed line intensity ratios to the plasma temperature. A deuterium sample plasma is produced and heated to a temperature of 2 to 7 eV at an electron density of 5 x 10/sup 16/ cm/sup -3/. The plasma parameters are monitored at various discrete times during the plasma decay using the Thomson scattering system. Simultaneously, the same sample volume is observed in the visible region of the spectrum using a streak camera coupled to a spectrograph. A continuous record of the plasma visible spectrum is thus obtained during the plasma time history, with at one specific time a data point on the plasma parameters, n/sub e/ and T/sub e/. Modifications were made to the plasma sample facility to shorten the duration of the preionization current and to increase its magnitude. This modification accomplished the desired effect of increasing the electron density in the heated plasma to 5 x 10/sup 16/, essentially obtaining full filling density. Additional insulation was added to the solenoid and satisfactory simultaneous operation of the solenoid at a 20 kV charging voltage and the preionization discharge at a 40 kV charging voltage was demonstrated.

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55 pages

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Dep. NTIS, MF A01.

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  • November 1, 1977

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  • Jan. 22, 2018, 7:23 a.m.

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  • March 1, 2021, 3 p.m.

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Crawford, E.; Quimby, D.; Hoffman, A. & Pietrzyk, Z.A. Investigation of impurity radiation from a well diganosed, laser heated plasma sample. Final report, report, November 1, 1977; United States. (https://digital.library.unt.edu/ark:/67531/metadc1055537/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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