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Novel Capsule Fill Tube Assemblies for the Hydrodynamic Growth Radiography Targets

Journal Article · · Fusion Science and Technology
 [1];  [2];  [2];  [2];  [2];  [3]
  1. General Atomics, San Diego, CA (United States); General Atomics
  2. General Atomics, San Diego, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Capsule Fill Tube Assemblies (CFTAs) consist of an ablator capsule and fill tube via a laser drilled funnel hole. This hole then tapers from 17 μm diameter at the outer surface of the ablator capsule to less than 5 μm diameter on the inside of the capsule over approximately 200 μm of wall thickness. Demand for better understanding of the fill tube perturbation during the capsule implosion has driven advancements in the fill tube design. Engineering efforts have been made on Hydrodynamic Growth Radiography Assemblies (HGRs) using multiple tube design variations, including alternative angles, depths, sizes, and location with engineered defects to showcase fill tube effects during an implosion. Furthermore, testing has shown that these CFTAs and HGRs have survived all fabrication and transport to from General Atomics to Lawrence Livermore National Laboratory. These assemblies have also passed cryogenic testing at General Atomics. An overview of alternative CFTA designs, fabrication methods and developments will be presented.
Research Organization:
General Atomics, San Diego, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344; NA0001808
OSTI ID:
1402462
Alternate ID(s):
OSTI ID: 1430994
Journal Information:
Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 2 Vol. 73; ISSN 1536-1055
Publisher:
American Nuclear SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (7)

Double-pulse machining as a technique for the enhancement of material removal rates in laser machining of metals journal August 2005
Hydrodynamic instability growth of three-dimensional modulations in radiation-driven implosions with “low-foot” and “high-foot” drives at the National Ignition Facility journal April 2017
Mix and hydrodynamic instabilities on NIF journal June 2017
Robust Capsule and Fill Tube Assemblies for the National Ignition Campaign journal April 2009
Laser Forming of Shaped Fill Holes in Beryllium Targets for Inertial Confinement Fusion Experiments journal April 2009
Automation of NIF Target Characterization and Laser Ablation of Domes Using the 4pi System journal May 2015
Planarization of Isolated Defects on ICF Target Capsule Surfaces by Pulsed Laser Ablation journal September 2016

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS