Spatial filter pinhole development for the National Ignition Facility

Journal Article · Mon Mar 20 00:00:00 EST 2000 · Applied Optics

DOI:https://doi.org/10.1364/AO.39.001405· OSTI ID:20216489

Murray, James E ^[1]; Milam, David ^[1]; Boley, Charles D ^[1]; Estabrook, Kent G ^[1]; Caird, John A ^[1]

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1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94551 (United States)

We present results from a major experimental effort to understand the behavior of spatial filter pinholes and to identify and demonstrate a pinhole that will meet the requirements of the National Ignition Facility (NIF). We find that pinhole performance depends significantly on geometry and material. Cone pinholes are found to stay open longer and to cause less backreflection than pinholes of more conventional geometry. We show that a {+-}150-{mu}rad stainless-steel cone pinhole will pass a full-energy NIF ignition pulse with required margins for misalignment and for smoothing by spectral dispersion. On the basis of a model fitted to experimental results, a {+-}125-{mu}rad stainless-steel cone pinhole is also projected to meet these requirements. (c) 2000 Optical Society of America.

• OSTI ID: 20216489
• Journal Information: Applied Optics, Vol. 39, Issue 9; Other Information: PBD: 20 Mar 2000; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

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