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Full-Text Articles in Physical Sciences and Mathematics
Laser Ablation Of Optically Thin Absorbing Liquid Layer Predeposited Onto A Transparent Solid Substrate, S. I. Kudryashov, K. Lyon, S. D. Shukla, D. Murry, S. D. Allen
Laser Ablation Of Optically Thin Absorbing Liquid Layer Predeposited Onto A Transparent Solid Substrate, S. I. Kudryashov, K. Lyon, S. D. Shukla, D. Murry, S. D. Allen
Mechanical Engineering - Daytona Beach
Ablation of optically thin liquid 2-propanol layers of variable thickness on IR-transparent solid Si substrate by a nanosecond CO 2laser has been experimentally studied using time-resolved optical interferometric and microscopy techniques. Basic ablation parameters - threshold fluences for surface vaporization and explosive homogeneous boiling of the superheated liquid, ablation depths, vaporization (ablation) rates, and characteristic ablation times versus laser fluence - were measured as a function of alcohol layer thickness. The underlying ablation mechanisms, their thermodynamics, and microscopic details are discussed.
c 2006 American Institute of Physics
Parametric Generation Of Multimegahertz Acoustic Oscillations In Laser-Generated Multibubble System In Bulk Water, Sergey I. Kudryashov, Kevin Lyon, Susan D. Allen
Parametric Generation Of Multimegahertz Acoustic Oscillations In Laser-Generated Multibubble System In Bulk Water, Sergey I. Kudryashov, Kevin Lyon, Susan D. Allen
Mechanical Engineering - Daytona Beach
Using a nanosecond C O2 laser for explosive surface boiling of bulk water, oscillatory acoustic transients from steam bubbles were recorded using a contact photoacoustic technique. Multiple well-resolved, high-amplitude multimegahertz spectral features reflecting parametric interactions between oscillations of cavitating steam bubbles were revealed in the fast Fourier transformation spectra of these transients. A potential parametric generation mechanism for these oscillation modes of steam bubbles is discussed.
© 2006 American Institute of Physics.