Optomechanical design of a prompt gamma reaction history diagnostic

Journal Article · Thu Jan 01 00:00:00 EST 2009

OSTI ID:990796

Hermann, Hans W ^[1]; Kaufman, Morris I ^[1]; Malone, Robert M ^[2]; Frogget, Brent C ^[2]; Tunnell, Thomas W ^[2]; Cox, Brian ^[2]; Frayer, Daniel K ^[2]; Ali, Zaheer ^[2]; Stoeffl, Wolfgang ^[3]

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1. Los Alamos National Laboratory
2. NSTEC
3. LLNL

The National Ignition Facility and the Omega Laser Facility both have a need for measuring prompt gamma radiation as part of a nuclear diagnostic program. A new gamma-detection diagnostic using off-axis-parabolic mirrors has been built. Some new techniques were used in the design, construction, and tolerancing of this gamma ray diagnostic. Because of the wavelength requirement (250-700 nm), the optical element surface finishes were a key design consideration. The optical enclosure had to satisfy pressure safety concerns and shielding against electromagnetic interference induced by gammas and neutrons. Structural finite element analysis was needed to meet rigorous optical and safety requirements. The optomechanical design is presented. Alignment issues are also discussed.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 990796
• Report Number(s): LA-UR-09-04572; LA-UR-09-4572; TRN: US1007395
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALIGNMENT
DESIGN
GAMMA DETECTION
LASERS
MIRRORS
NEUTRONS
PHOTONUCLEAR REACTIONS
PROMPT GAMMA RADIATION
SAFETY
SHIELDING
US NATIONAL IGNITION FACILITY
WAVELENGTHS