STP799

    Damage Thresholds to Metal Mirrors by Short-Pulse CO2 Laser Radiation

    Published: Jan 1983


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    Abstract

    Measurements of damage to metal surfaces induced by intense nanosecond pulses of ir radiation are reported. Single-shot damage thresholds of Cu, stainless steel, molybdenum and aluminum surfaces have been measured for various angles of incidence and the predicted increase in damage thresholds for grazing incidence optical components have been experimentally verified for the first time at 10-μm.

    Multiple-shot damage tests have also been performed and practical lifetime curves for Cu mirrors have been established. Scanning electron micrographs of the mirror show the damage mechanism to be the development of a fine scale (1 μm) microstructure on the copper surface.

    Keywords:

    CO, 2, lasers, grazing incident, laser induced damage, metal mirrors, multiple-shot threshold


    Author Information:

    Figueira, JF
    University of California Los Alamos National Laboratory, Los Alamos, NM

    Thomas, SJ
    University of California Los Alamos National Laboratory, Los Alamos, NM

    Harrison, RF
    University of California Los Alamos National Laboratory, Los Alamos, NM


    Paper ID: STP37245S

    Committee/Subcommittee: F01.02

    DOI: 10.1520/STP37245S


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