Actions for Optical alignment techniques for line-imaging velocity interferometry and line-imaging self-emission of targets at the National Ignition Facility (NIF) [electronic resource].

Email RIS file
Bookmark
Report an Issue

Optical alignment techniques for line-imaging velocity interferometry and line-imaging self-emission of targets at the National Ignition Facility (NIF) [electronic resource].

Published
Washington, D.C. : United States. National Nuclear Security Administration, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
United States. National Nuclear Security Administration and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
The National Ignition Facility (NIF) requires optical diagnostics for measuring shock velocities in shock physics experiments. The nature of the NIF facility requires the alignment of complex three-dimensional optical systems of very long distances. Access to the alignment mechanisms can be limited, and any alignment system must be operator friendly. The Velocity Interferometer System for Any Reflector (VISAR) measures shock velocities, shock breakout times, and emission of 1- to 5-mm targets at a location remote to the NIF target chamber. Three optical systems using the same vacuum chamber port each have a total track of 21 m. All optical lenses are on kinematic mounts or sliding rails, enabling pointing accuracy of the optical axis to be checked. Counter-propagating laser beams (orange and red) align these diagnostics to a listing of tolerances. Movable aperture cards, placed before and after lens groups, show the spread of alignment spots created by the orange and red alignment lasers. Optical elements include 1-in. to 15-in. diameter mirrors, lenses with up to 10.5-in. diameters, beamsplitters, etalons, dove prisms, filters, and pellicles. Alignment of more than 75 optical elements must be verified before each target shot. Archived images from eight alignment cameras prove proper alignment before each shot.
Report Numbers
E 1.99:doe/nv/25946--255
doe/nv/25946--255
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/2007.
"doe/nv/25946--255"
2007 SPIE Optics and Photonics Conference; San Diego, CA; August 26-30, 2007.
MacGowan, Brian; Celliers, Peter; Robinson, Ronald; Malone, Robert; Lee, Tony; Watts, Phillip; Reinbachs, Imants; Celeste, John; Frogget, Brent; Kaufman, Morris; Robert Guyton,,; Ng, Edmend; Tunnell, Thomas.
National Security Technologies, LLC
Funding Information
DE-AC52-06NA25946
View MARC record | catkey: 14106266