Accession Number : AD0710937

Title :   DEVELOPMENT OF A NOZZLE BEAM CONTAINING ATOMIC OXYGEN.

Descriptive Note : Technical note,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Lam,Calvin K.

Report Date : JUL 1970

Pagination or Media Count : 47

Abstract : Initial studies of the feasibility of producing a hypersonic molecular beam containing appreciable amount of atomic oxygen have been successfully completed. The purpose of the work was to produce a molecular beam which could be used for basic and applied studies related to the interaction of the earth's upper atmosphere, such as accommodation coefficient measurements or surface reactions at high kinetic energy. A quartz tube source was developed for the molecular beam in which a 200 watt microwave discharge could be maintained. The studies included the effect of pressure and orifice size, for which a compromise was involved in order to achieve high Mach numbers and high dissociation levels, the use of double cavities, and the effect of small additions of H2O. It was demonstrated in these initial tests that a hypersonic beam from a 92% He 8% O2 mixture could be produced with 17% dissociation. (Author)

Descriptors :   (*MOLECULAR BEAMS, *HYPERSONIC FLOW), (*OXYGEN, MOLECULAR BEAMS), DESIGN, HYPERSONIC NOZZLES, DISSOCIATION, QUARTZ, CANADA

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE