Accession Number:

AD0745964

Title:

Experiments on the Application of Laser Selective Excitation Spectroscopy to the Diagnostics of a Potassium Plasma,

Descriptive Note:

Corporate Author:

TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s):

Report Date:

1972-04-01

Pagination or Media Count:

130.0

Abstract:

A thermally tuned Q-switched ruby laser of moderate power, with emission wavelength at 6939A, has been used to selectively excite the 4 doublet P32-6 doublet S12 transition in the atoms of a pure potassium plasma of low degree of ionization produced in a hot cathode diode. A pulse of intensified spontaneous emission has been produced at 6939A, 6911A and at a number of other wavelengths, as a result of the laser selective excitation. The characteristics of the plasma intensified emission pulse have been observed to depend on the local conditions of the plasma, at the point of intersection of the laser beam and the solid angle of observation, estimated by a Langmuir probe. The possibility of using this type of interaction for the purpose of diagnosing the plasma has been studied experimentally. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE