Accession Number : AD0622102

Title :   INVESTIGATION OF THE USE OF A LASER AS A SPECTROGRAPHIC SOURCE.

Descriptive Note : Final rept. for 1 Jun 64-31 May 65,

Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA QUANTUM ELECTRONICS DEPT

Personal Author(s) : KLOTZBAUGH,G. A. ; Wolfe,A. L. ; Paterson,J. E. ; Osial,T. A.

Report Date : 30 JUN 1965

Pagination or Media Count : 106

Abstract : The possibilities are studied of using a laser beam in spectrographic analysis. High intensity focused laser radiation is used to bombard various metal targets. An ionized plume is thereby produced, leaving behind a small crater in the target surface. This vapor is analyzed by a conventional spectrograph, thus producing a recorded spectrum that is characteristic of the target surface. This problem is studied both experimentally and theoretically, and it is concluded that best results are obtained when the plume is cross excited by a secondary source immediately after the laser generates the plume. Two types of lasers are used in the study. One is a normal laser having a few hundred spikes of energy in each pulse. The total pulse duration is of the order of a millisecond. The second type is a giant spike laser, in which all of the energy is released in one pulse of about a hundred nanosecond duration. The merits of each as spectrographic tools are discussed. (Author)

Descriptors :   (*LASERS, SPECTROSCOPY), (*SPECTROSCOPY, LASERS), LIGHT PULSES, METALS, HEATING, VAPORIZATION, QUANTITATIVE ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE