Damage thresholds of fused silica, plastics and KDP crystals measured with 0. 6-ns 355-nm pulses
We used 355-nm, 0.6-ns pulses focused to a beam diameter of approximately 1 mm to measure the laser damage thresholds for surfaces of bare polished samples of several types of fused silica, for the bulk of crystals of potassium dihydrogen phosphate (KDP), and for a few plastics. Surface damage thresholds for fused silica ranged from 1 to 14 J/cm/sup 2/, and were least for surfaces with residual subsurface polishing fractures. Thresholds for inclusion damage in KDP crystals were 2 to 4 J/cm/sup 2/. Test volumes in these same crystals had thresholds from 2.5 to 7.0 J/cm/sup 2/ when they were laser hardened by repeated subthreshold irradiation. FEP teflon films had thresholds of 3 J/cm/sup 2/, which were the greatest threshold observed for a plastic.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5041235
- Report Number(s):
- UCRL-89866; CONF-8311146-3; ON: DE84009534
- Country of Publication:
- United States
- Language:
- English
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Laser damage to production- and research-grade KDP crystals
Laser damage to production- and research-grade KDP crystals
Related Subjects
360406 -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
360605* -- Materials-- Radiation Effects
ALKALI METAL COMPOUNDS
CHALCOGENIDES
DAMAGE
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEATING
IRRADIATION
LASER-RADIATION HEATING
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL RADIATION EFFECTS
PLASMA HEATING
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
POTASSIUM COMPOUNDS
POTASSIUM PHOSPHATES
PULSED IRRADIATION
RADIATION EFFECTS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SYNTHETIC MATERIALS
TEFLON