Accession Number : AD0610517

Title :   STUDIES OF THE EFFECT OF LASER RADIATION ON CHEMICAL ACTIVATION AND VAPOR FOG NUCLEATION.

Descriptive Note : Quarterly progress rept. no. 1, Jun-Sep 64,

Corporate Author : MITHRAS INC CAMBRIDGE MASS

Personal Author(s) : Naiman,Charles S. ; DeWolf,Mary Yvonne ; Schwartz,Jack

Report Date : NOV 1964

Pagination or Media Count : 17

Abstract : The first objective is the study of various effects of laser radiation upon vapor and liquid systems comprised of, but not limited to, the simulant dimethyl methylphosphonate (DMMP) or air components or both. The second objective is to obtain basic information on the condensation of vapor or aerosol fogs as a result of laser radiation. The chemical shifts, coupling constants, and relaxation times of the methyl and methoxy protons in DMMP have been measured by nuclear magnetic resonance (NMR) techniques. Effects of focused and unfocused, Q-switched and non-Q-switched laser radiation on methanol vapor in a continuously sensitive cloud chamber were studied. A much less intense laser beam can produce condensation by incidence on a suitable surface than is required to produce tracks directly with a focused beam. A cloud chamber was tested with low vapor pressure materials, such as water, to determine the modifications that are necessary, in order to study DMMP in the cloud chamber. From NMR studies, it was concluded that background information about the conventional NMR spectrum and relaxation times is both essential and measurable. From the study of methanol in a continuously sensitive cloud chamber, a much less intense laser beam can produce condensation by incidence on a suitable surface than is required to produce tracks directly with a focused beam. (Author)

Descriptors :   (*LASERS, ELECTROMAGNETIC PROPERTIES), (*AEROSOLS, NUCLEATION), VAPORS, CONDENSATION, PROTONS, NUCLEAR MAGNETIC RESONANCE, RELAXATION TIME, ORGANIC PHOSPHORUS COMPOUNDS, AIR, IONIZATION, PHOTOCHEMICAL REACTIONS, ALCOHOLS, CLOUD CHAMBERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE