Results 251 to 260 of about 263,801 (301)

Heat Generation in Laser Irradiated Tissue

Journal of Biomechanical Engineering, 1989
Many medical applications involving lasers rely upon the generation of heat within the tissue for the desired therapeutic effect. Determination of the absorbed light energy in tissue is difficult in many cases. Although UV wavelengths of the excimer laser and 10.6 μm wavelength of the CO2 laser are absorbed within the first 20 μm of soft tissue ...
A J, Welch, J A, Pearce, K R, Diller, G, Yoon, W F, Cheong   +4 more
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Imaging laser-induced plasma under different laser irradiances

Spectrochimica Acta Part B: Atomic Spectroscopy, 2020
Abstract The ablation process of a sample in Laser-Induced Breakdown Spectroscopy (LIBS) is fast and dynamic. Investigating such dynamic process requires a good temporal and spatial resolution in order to understand the physical processes involved. However, the LIBS instrumentation tends to be versatile and price sensitive.
Jakub Buday, Pavel Pořízka, Jozef Kaiser   +2 more
openaire   +1 more source

Laser Irradiation of Semiconductors

Physica Scripta, 1982
Interest in irradiation of ion implanted semiconductors with high power Q-switched laser pulse arose initially by several possible advantages in the annealing of lattice damage and in the fully electrical activation of the implanted species. In the meantime the physical mechanisms of the annealing process were also investigated. Measurements in situ, i.
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Aluminium Reflectance Under Excimer Laser Irradiation

SPIE Proceedings, 1988
The reflectance of cold rolled Aluminium during Xe-Cl excimer laser pulse irradiation with power densities in the range 10 MW/cm2 to 14 GW/cm2 has been investigated. Plasma formation at 500 MW/cm2 without previous melting at lower power is observed. "Laser cleaning" of the surface lowers plasma threshold to the pure Aluminium value and melting of the ...
ANEDDA, ALBERTO, MURA, ANTONIO ANDREA, F. Raga, M. Cappai   +3 more
openaire   +1 more source

Segmental Irradiation of the Bladder with Neodymium YAG Laser Irradiation

Journal of Urology, 1982
The Neodymium YAG laser energy source can be readily adapted for cystoscopic use by some simple modifications of existing urologic equipment. Both the fiberoptic resectoscope and a deflecting cystourethroscope have been adapted for this purpose. Fixation of the fiber tip 1 cm.
M S, McPhee, D R, Mador, J, Tulip, B, Ritchie, R, Moore, W H, Lakey   +5 more
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Neodymium: Yag laser irradiation of bladder hemangioma

Urology, 1984
Bladder hemangiomas may occur singly or in association with systemic arteriovenous malformations. Previously open surgical removal of these lesions has been necessary and endoscopic resection or biopsy strongly discouraged. We report a case of the Klippel-Trenaunay-Weber syndrome and a massive bladder hemangioma.
J A, Smith, J A, Dixon
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FLOW OF METAL UNDERGOING LASER IRRADIATION

Numerical Heat Transfer, 1988
The flow of metal subjected to a laser beam is analyzed. The model presented takes into account changes of the laser beam intensity in time and in cross section. This nonlinear phenomenon is solved using the finite-element method. Numerical examples complete the analysis presented.
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Laser Microbeams for Partial Cell Irradiation

1972
Publisher Summary Lasers have been used in microbeam irradiation for almost 10 years. In that short period of time, they have been applied to the investigation of a wide variety of organisms and cell types. Many of the problems of the laser microbeam remain unsolved; of them the most important is dosimetry. Dosimetric measurements are often difficult
M W, Berns, C, Salet
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Laser Driven Plasma Instabilities at Moderate Laser Irradiances

1992
A systematic investigation is in progress on Second Harmonic (SH) and Three-Half Harmonic (3ω/2) emission generated by the interaction of a 3 ns 1.064 μm Nd:YAG laser beam with underdense plasmas produced from thin plastic targets at irradiances up to 5x1013 Wcm-2. 2-D time resolved imaging of the interaction region in SH light has been performed for a
Gizzi, L. A., Batani, D., Biancalana, V., Borghesi, M., Chessa, P., Deha, I., Giulietti, A., Giulietti, D., Schifano, E., Willi, O.   +9 more
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Interfaces under Laser Irradiation

1983
This lecture deals with structural and chemical changes in binary samples induced by short laser pulses, typically pulses in the ns regime.
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