Accession Number : ADA305484

Title :   Comprehensive Investigation of Low- and High- Power Arcjet Operation.

Descriptive Note : Final rept. 1 Mar 93-31 Aug 95,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Erwin, Daniel

PDF Url : ADA305484

Report Date : 16 FEB 1996

Pagination or Media Count : 53

Abstract : Experimental investigation of several aspects of arcjet operation is performed using several diagnostic techniques developed here. Two techniques address the outstanding experimental problem of measurement of plume species density. These are pulsed electron beam fluorescence and two photon laser induced fluorescence. The former provides data on both molecular and atomic properties, while the latter measures only ground state atom properties. Ground state atomic hydrogen density is measured here for the first time. Current modulation velocimetry is applied to the study of plume velocity fluctuations. It is found that they exhibit no correlation with the supply current ripple and thus seem to be random.

Descriptors :   *LASER INDUCED FLUORESCENCE, *ELECTROJETS, HYDROGEN, ELECTRON BEAMS, ARC JET ENGINES, PLUMES, VELOCIMETERS, MODULATION, ATOMIC PROPERTIES, MOLECULAR PROPERTIES.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Electric and Ion Propulsion

Distribution Statement : APPROVED FOR PUBLIC RELEASE