Chemical Additives and Diagnostics for High Temperature Air Plasmas.
Final rept. 23 Oct 70-22 Oct 71,
WHITTAKER CORP WALTHAM MASS SPACE SCIENCES DIV
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The behavior of various low boiling-point, electrophilic chemical additives in a nitrogen-oxygen plasma was studied by using a K-band microwave horn probe and an S-band stripline probe. Test results show that Freon 113, Freon C-51-12, trichloroethylene, and carbon tetrachloride, which previously have been found to be excellent additives for the enhancement of microwave transmission through an argon plasma, are also very effective in removing free electrons and improving microwave transmission through the nitrogen-oxygen plasma. The principles of operation of the K-band microwave horn system and the S-band stripline diagnostic system are briefly discussed. Flight data obtained from a two-coil conductivity probe constructed under the previous contract for the measurement of plasma electrical conductivity of a re-entry nose cone were analyzed. Author
- Plasma Physics and Magnetohydrodynamics
- Radiofrequency Wave Propagation