Laser-induced damage initiated on the surface of particle contamination fused silica at 1064nm

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An experimental study was undertaken to quantify the effects of contamination particles on the damage threshold of laser-illuminated fused silica optics and set cleanliness requirements for optics on the beam line of the National Ignition Facility at Lawrence Livermore National Laboratory. Circular contamination particles were sputter-deposited onto fused silica windows which were then illuminated repetitively using a 1064nm laser. A variety of contaminants were tested including metals, oxides, and organics. Tests were conducted with particles on the input and output surfaces of the window, and the morphological features of the damage were very reproducible. A plasma often ignited at the ... continued below

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51 p.; Other: FDE: PDF; PL:

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Michlitsch, K.J. June 1, 1998.

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Description

An experimental study was undertaken to quantify the effects of contamination particles on the damage threshold of laser-illuminated fused silica optics and set cleanliness requirements for optics on the beam line of the National Ignition Facility at Lawrence Livermore National Laboratory. Circular contamination particles were sputter-deposited onto fused silica windows which were then illuminated repetitively using a 1064nm laser. A variety of contaminants were tested including metals, oxides, and organics. Tests were conducted with particles on the input and output surfaces of the window, and the morphological features of the damage were very reproducible. A plasma often ignited at the contamination particle; its intensity was dependent upon the mass of the contaminant. Input surface damage was characteristically more severe than output surface damage. The size of the damaged area scaled with the size of the particle. On a few occasions, catastrophic damage (cracking or ablation of the substrate) initiated on the output surface due to contamination particles on either the input or output surface. From damage growth plots, predictions can be made about the severity of damage expected from contamination particles of known size and material.

Physical Description

51 p.; Other: FDE: PDF; PL:

Notes

OSTI as DE98058344

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  • Other Information: PBD: 1 Jun 1998

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  • Other: DE98058344
  • Report No.: UCRL-LR--130583
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/302206 | External Link
  • Office of Scientific & Technical Information Report Number: 302206
  • Archival Resource Key: ark:/67531/metadc675033

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 23, 2016, 1:49 p.m.

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Michlitsch, K.J. Laser-induced damage initiated on the surface of particle contamination fused silica at 1064nm, report, June 1, 1998; California. (digital.library.unt.edu/ark:/67531/metadc675033/: accessed January 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.