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Title: Design and engineering of a target for x-ray Thomson scattering measurements on matter at extreme densities and gigabar pressures

Journal Article · · Fusion Science and Technology
DOI:https://doi.org/10.13182/FST15-242· OSTI ID:1342996
 [1];  [2];  [2];  [2];  [3];  [1];  [1];  [4];  [2];  [1];  [5];  [6]
  1. General Atomics, San Diego, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. General Atomics, La Jolla, CA (United States)
  4. Univ. of California, Berkeley, CA (United States)
  5. GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt (Germany)
  6. Schafer Corp., Livermore, CA (United States)
+ Show Author Affiliations

Reconciling the experimental and system requirements during the development of a new target system is one of the most challenging tasks in the design and engineering of targets used in the National Ignition Facility. Targets for the GigaBar 3 campaign were meant to allow the detection of extremely weak Thomson scattering from matter at extreme densities in the face of very bright backlighter and laser entry hole plasma emissions. The problem was to shield the detector sufficiently while maintaining beamline and view clearances, and observing target mass restrictions. A new construction process, based on a rapid prototype frame structure, was used to develop this target. As a result, details of the design process for these targets are described, and lessons from this development for production and target assembly teams are discussed.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1342996
Report Number(s):
LLNL-JRNL-676981; TRN: US1701820
Journal Information:
Fusion Science and Technology, Vol. 70, Issue 2; ISSN 1536-1055
Publisher:
American Nuclear SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (7)

Fuel gain exceeding unity in an inertially confined fusion implosion journal February 2014
X-ray Thomson scattering in high energy density plasmas journal December 2009
X-Ray Scattering Measurements of Strong Ion-Ion Correlations in Shock-Compressed Aluminum journal February 2013
Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering journal April 2014
Qualification of a high-efficiency, gated spectrometer for x-ray Thomson scattering on the National Ignition Facility journal November 2014
X-ray Thomson scattering as a temperature probe for Gbar shock experiments journal May 2014
Probing matter at Gbar pressures at the NIF journal March 2014

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
42 ENGINEERING
NIF targets
precision engineering
x-ray Thomson scattering