MECHANISMS OF LASER-SURFACE INTERACTIONS
HONEYWELL INC HOPKINS MN CORPORATE RESEARCH CENTER
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This report extends earlier measurements on particle emission produced when approximately 50 megawattssq cm pulses of radiation from a Q- switched ruby laser are absorbed at metal surfaces. Ion emission from carbon targets includes Li6, Li7, C, CH3, H2O, Na, and K ions with energies up to 540 ev. Emission from single crystalline nickel targets includes ion species not observed before in this work, i.e., Na and H2. Work using a quadrupole mass spectrometer to study neutral molecule emission has also been extended to carbon targets, which yield results similar to other target materials, and additional confirming work on the presence of high energy neutral molecules has been performed. Equipment under construction for measurement of the angular distribution of the ion emission is described. The expansion of the laser produced gas and resulting particle fluxes at a distance from the surface are discussed.
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy