Damage to fused silica windows while under simultaneous exposure to flowing solvents and laser radiation and 308nm

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This paper reports the results of a study to determine the degrading effects of flowing dye solvents on the laser damage threshold of fused-silica windows at 308nm. Thresholds were measured at the SiO/sub 2/solvent interface in a test cell. Bare SiO/sub 2/ tested in air at 308nm (20ns) typically exhibits a threshold ranging from 4 to 10 Jcm/sup 2/; with the solvent cyclohexane in contact, a threshold as low as 0.3 Jcm/sup 2/ was measured. The damage data indicate that window lifetime (number of shots) is dependent of fluence at higher levels, and asymptotically approaches infinity at levels near threshold. ... continued below

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Pages: 6

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Mauro, B.R.; Foltyn, S.R. & Sanders, V.E. January 1, 1987.

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Description

This paper reports the results of a study to determine the degrading effects of flowing dye solvents on the laser damage threshold of fused-silica windows at 308nm. Thresholds were measured at the SiO/sub 2/solvent interface in a test cell. Bare SiO/sub 2/ tested in air at 308nm (20ns) typically exhibits a threshold ranging from 4 to 10 Jcm/sup 2/; with the solvent cyclohexane in contact, a threshold as low as 0.3 Jcm/sup 2/ was measured. The damage data indicate that window lifetime (number of shots) is dependent of fluence at higher levels, and asymptotically approaches infinity at levels near threshold. Dielectric coatings were tested as possible damage-resistent barriers between the solvent and SiO/sub 2/; the results show some improvement in damage threshold. When cyclohexane is replaced with the solvent dioxane, thresholds measured for SiO/sub 2/ windows are within the range cited above for thresholds measured in air.

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Pages: 6

Notes

NTIS, PC A02; 3.

Source

  • Boulder damage symposium, Boulder, CO, USA, 26 Oct 1987

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  • Other: DE88009146
  • Report No.: LA-UR-88-1094
  • Report No.: CONF-8710165-14
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5131356
  • Archival Resource Key: ark:/67531/metadc1057554

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Office of Scientific & Technical Information Technical Reports

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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  • January 1, 1987

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:02 p.m.

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Mauro, B.R.; Foltyn, S.R. & Sanders, V.E. Damage to fused silica windows while under simultaneous exposure to flowing solvents and laser radiation and 308nm, article, January 1, 1987; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1057554/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.