Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Effect of random clustering on surface damage density estimates

[+] Author Affiliations
Manyalibo J. Matthews, Michael D. Feit

Lawrence Livermore National Lab.

Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67201J (December 20, 2007); doi:10.1117/12.752938
Text Size: A A A
From Conference Volume 6720

  • Laser-Induced Damage in Optical Materials: 2007
  • Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M. J. Soileau; Christopher J. Stolz
  • Boulder, CO | September 24, 2007

abstract

Identification and spatial registration of laser-induced damage relative to incident fluence profiles is often required to characterize the damage properties of laser optics near damage threshold. Of particular interest in inertial confinement laser systems are large aperture beam damage tests (>1cm2) where the number of initiated damage sites for Φ >14J/cm2 can approach 105-106, requiring automatic microscopy counting to locate and register individual damage sites. However, as was shown for the case of bacteria counting in biology decades ago, random overlapping or 'clumping' prevents accurate counting of Poisson-distributed objects at high densities, and must be accounted for if the underlying statistics are to be understood. In this work we analyze the effect of random clumping on damage initiation density estimates at fluences above damage threshold. The parameter ψ =aρ = ρ /ρ 0, where a =1 / ρ 0 is the mean damage site area and ρ is the mean number density, is used to characterize the onset of clumping, and approximations based on a simple model are used to derive an expression for clumped damage density vs. fluence and damage site size. The influence of the uncorrected ρ vs. Φ curve on damage initiation probability predictions is also discussed.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Manyalibo J. Matthews and Michael D. Feit
"Effect of random clustering on surface damage density estimates", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67201J (December 20, 2007); doi:10.1117/12.752938; http://dx.doi.org/10.1117/12.752938


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.