STUDIES OF THE EFFECT OF LASER RADIATION ON CHEMICAL ACTIVATION AND VAPOR FOG NUCLEATION.
Quarterly progress rept. no. 7, Feb-May 66,
MITHRAS CAMBRIDGE MA
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Studies of laser irradiation effects on DMMP are presented. Effects of 0.6943 micron radiation from a ruby laser and 10.6 micron radiation from a CO2 laser are compared. Analytical techniques are given for study of the decomposition products by gas chromatography and mass spectrometry. Design details of a simple CO2 laser suitable for laboratory purposes, and used in the reported studies, are given. Conclusions are relevant to applications of laser irradiation to potential decontamination and protection methods. The CO2 laser is a highly practical source of large amounts of energy in coherent form. At power levels, the order of several wattssq cm, there are negligible effects on the vapor at room temperature, whereas liquid DMMP is decomposed into the same products as direct heating CO2 laser irradiation effects significant decomposition of DMMP in liquid form. The ruby laser yields chemical breakdown products in DMMP only at sufficient intensities to cause dielectric breakdown. Thermal decomposition products have been identified to date. Additional products are antificapted, but conclusive evidence on their existence is not yet available. Such electronic decomposition products are defined as species that cannot be produced by simple heating. The procedures for analysis of DMMP laser irradiation products have been established, as well as for preparation of suitably pure materials for basic studies. Typical operating parameters for chromatography are given. Author
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy