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INVESTIGATION OF THE PROPERTIES OF HOT PLASMA GASES AND MEASUREMENT OF GAS TEMPERATURES NEAR SOLID SURFACES.
Final scientific rept. 1961-1964,
CLARENDON LAB UNIV OF OXFORD (ENGLAND)
Pagination or Media Count:
Studies were made of the methods of gas temperature measurements particularly of a plasma jet where the temperature can be derived from the gas density. One density measurement uses in principle the determination of the range of alpha-particles from a polonium source. Two other methods, one using the Doppler effect of sound and the other using the velocity of a pressure pulse were also discussed. The calorelectric effect was investigated experimentally and theoretically. Its mechanism was suggested supported by measurements of the electron temperature. A study of the ionization in flames led to the conclusion that the electron temperature in flames at atmospheric pressure can exceed markedly that of the neutral gas. As a result of it the large electron concentration in flames may well be caused by electron collisions rather than by a series of processes termed chemi-ionization. The theory of double probes was extended to high gas pressures where the motion of charges is controlled by collision processes such as mobility and diffusion.
APPROVED FOR PUBLIC RELEASE