NaCl particle sources—nebulizer and furnace systems. (a) Nebulizer system. (b) Furnace system.
Laser and measurement system for NaCl fragmentation.
Size distributions of NaCl particles photofragmented at fluences of by photons at (0.8 shots/particle). The nonirradiated original particle size distribution from the nebulizer system is shown in black-filled circles.
(a): Size distributions of NaCl particles photofragmented at fluences from by photons at (8 shots/particle). The original particle size distribution and the laser fluences applied are the same as the previous case. (b): The enlarged size distributions for the range of in diameter.
SEM images of nonirradiated and irradiated NaCl particles. (a) Nonirradiated NaCl Particles from the nebulizer system. (b) NaCl particles irradiated at , .
Size distributions of NaCl and soot particles photofragmented at by photons. The size distributions of soot particles are from Ref. 7. NaCl and soot particles at are photofragmented by eight laser pulses while NaCl at and soot at are hit by approximately single laser pulse. The original particles are shown in open and filled circles for NaCl and soot particles, respectively.
Size distributions of NaCl particles photofragmented for fluences of 0.11 and by photons at . The original particles shown in filled circle are generated from the furnace system. Laser irradiation at of flow in the cuvette makes 0.8 shots per particle.
Volume fraction of the new mode of small particles created by laser irradiation. The volume fraction is the ratio of the volume of new mode of particles smaller than the mean size to that of the original, nonirradiated particles from the nebulizer system.
Data for single and multiple shot photofragmentations of NaCl (from the nebulizer) and soot particles. Note that the total volume of the NaCl particles is conserved at , while the soot has decreasing volume concentrations of , , and for 0, 20, and , respectively.
Photon-to-atom ratios (PARs) for various laser fluence conditions assuming that all the photons striking NaCl particles are absorbed.
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