Transport Properties in High Power Arcs.
Final rept. 1 Feb 67-31 Jan 71,
TECHNISCHE UNIVERSITAET MUNICH (WEST GERMANY) ELEKTROPHYSIKALISCHES INSTITUT
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In order to investigate transport and radiation properties of various plasmas the cascade arc chamber was improved with respect to new electrodes, to pressure proof, and to air-cooled plates for low power input and was made fit for viscosity measurements by providing a honeycomb flow rectifier and pressure taps along the cascade. The temperature distribution across the H2 - arc has been re-examined by all methods available with high precision. The splitting of the heat flux potential curves vs. temperature at low currents in the N2 arc could be removed by reducing the electron temperature to the gas temperature taking into account inelastic collisions between electrons and N2 - molecules. In the Ar-arc radiation plays a dominant role and changes rapidly with elevated pressures. Therefore extended measurements of all quantities of interest have been carried out at temperatures up to 25,000K and in the pressure range from 1 to 10 atms.
- Plasma Physics and Magnetohydrodynamics