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Title: Optomechanical design of a prompt gamma reaction history diagnostic

Abstract

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.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Los Alamos National Laboratory
  2. NSTEC
  3. LLNL
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
990796
Report Number(s):
LA-UR-09-04572; LA-UR-09-4572
TRN: US1007395
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
70; ALIGNMENT; DESIGN; GAMMA DETECTION; LASERS; MIRRORS; NEUTRONS; PHOTONUCLEAR REACTIONS; PROMPT GAMMA RADIATION; SAFETY; SHIELDING; US NATIONAL IGNITION FACILITY; WAVELENGTHS

Citation Formats

Hermann, Hans W, Kaufman, Morris I, Malone, Robert M, Frogget, Brent C, Tunnell, Thomas W, Cox, Brian, Frayer, Daniel K, Ali, Zaheer, and Stoeffl, Wolfgang. Optomechanical design of a prompt gamma reaction history diagnostic. United States: N. p., 2009. Web.
Hermann, Hans W, Kaufman, Morris I, Malone, Robert M, Frogget, Brent C, Tunnell, Thomas W, Cox, Brian, Frayer, Daniel K, Ali, Zaheer, & Stoeffl, Wolfgang. Optomechanical design of a prompt gamma reaction history diagnostic. United States.
Hermann, Hans W, Kaufman, Morris I, Malone, Robert M, Frogget, Brent C, Tunnell, Thomas W, Cox, Brian, Frayer, Daniel K, Ali, Zaheer, and Stoeffl, Wolfgang. Thu . "Optomechanical design of a prompt gamma reaction history diagnostic". United States. https://www.osti.gov/servlets/purl/990796.
@article{osti_990796,
title = {Optomechanical design of a prompt gamma reaction history diagnostic},
author = {Hermann, Hans W and Kaufman, Morris I and Malone, Robert M and Frogget, Brent C and Tunnell, Thomas W and Cox, Brian and Frayer, Daniel K and Ali, Zaheer and Stoeffl, Wolfgang},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}