Accession Number : AD0744518

Title :   Transport Properties in High Power Arcs.

Descriptive Note : Final rept. 1 Feb 67-31 Jan 71,

Corporate Author : TECHNISCHE UNIVERSITAET MUNICH (WEST GERMANY) ELEKTROPHYSIKALISCHES INSTITUT

Personal Author(s) : Maecker,Heinz H.

Report Date : MAY 1972

Pagination or Media Count : 74

Abstract : 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.

Descriptors :   (*GAS DISCHARGES, TRANSPORT PROPERTIES), GAS IONIZATION, LAMINAR FLOW, HYDROGEN, OXYGEN, NITROGEN, ELECTRICAL CONDUCTIVITY, THERMAL CONDUCTIVITY, WEST GERMANY

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE