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P. Fitzsimmons
for the Inertial Fusion Technology Team
General Atomics, P.O. Box 85608, San Diego, California
22nd Target Fabrication Meeting
Las Vegas, Nevada
March 12-16, 2017
Work supported by General Atomics Internal Research and Development funds, and by the U.S. Department of Energy under contract no. DE-NA0001808.
Review of GA Target Fabrication
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• Background to GA
• Notable Developments
• Laser Indirect Drive
• Laser Direct Drive
• Magnetic Direct Drive
• Alternative Concepts
• Future Developments
• Summary
Overview
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GA Has a Long History Providing Targets
Wide range of expertise
within the GA team
Facilities and equipment
• >40,000 sqft of facility space
• >$30M equipment 55%/45% split
• Classified work areas
• Class 100 cleanrooms
• Be labs
• Uranium labs
Stockpile support since 1991
• 113 staff across 5 locations
– La Jolla, San Diego 76
– Onsite: 1 LANL, 2 LLE, 6 SNL, 28 LLNL
• Onsite target assembly & fielding
• ~14,000 target components/year
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GA Maintains a Multitude of Capabilities to Fabricate
Various Target Classes
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GA Supports a Wide Range of Programs: ICF, HED,
Academic Access, etc
Magnetic Direct Drive
Laser Indirect Drive Laser Direct Drive
Alternative Concepts
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“Porcupine Plus”
Laser Indirect Drive: Capsule Fill Tube Assemblies (CFTAs)
and Alternative Tent Designs
Telescopic Fill Tube
10 µm fill tube
30 µm
fill tube Cantilever
5um Fill Tube
60% reduced fill hole mass deficit
40% neutron yield over 10 µm fill tube
30 µm fill
tube
10 µm fill
tube
J. Crippen. Talk
Alfonso. Talk
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Qu
an
tity
Laser Indirect Drive: Hohlraum Development and
Hohlraum Liners
Liner-less DU Hohlraum
3X
increase
DU Hohlraum Shipments
2014 2016
~200 µm
thick liner
GA ring, LLNL cast TaO
GA laser machined
Laser Machined TaO Machined ZnO-CH
Laser Machined Au-CH
J. Jaquez. TalkM. Havre. Poster
J. Williams. Talk
Au-CH inside
Au ring
Residual Au-CH
outside
Dedicated R&D improvement trials
2015
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CFTA Development and Testing
Laser Direct Drive: Measure and Control Ablator Surface
Features
Oxygen Modulation in GDP Capsule
Polystyrene Capsule Dark Field Defect Analysis
W. Sweet. Talk
L. Carlson. Poster
H. Huang. Talk
H. Reynolds. Talk
<0.1µm detection limit
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Magnetic Direct Drive: Beryllium, Diagnostics and Gas Tubes
2X increase in 4 years
Dielectric Coating
on Be bodyR. Paguio. Talk
Increasing Quantity & Complexity In-situ PDV Diagnostic Evolution
K. Tomlinson. Talk
Gas Tube for Laser Preconditioning
PECOS OMEGA-EP
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Alternative Concepts
RF
liner
GDP
Wetted foam capsule
Br doped CH
Alternative Concepts Double Shell
Gradient Wall Au Shell CFTA
Au shell
SiO2/CH bi-layer wall
Au-BeW-Mo
K.C. Chen. Talk
M. Hoppe. Talk
C. Kong. PosterH. Xu. Talk
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• Laser Indirect Drive:
– (Even) smaller fill tubes, fill tube less capsules, shimmed capsules,
GDP oxidation barriers (e.g. ALD coatings)
• Laser Direct Drive:
– Multi layer polystyrene, fielding CFTAs on OMEGA, implementing
high resolution metrology
• Magnetic Direct Drive:
– LiH/LiD liners, trace tritiated foam, wetted foam concepts
• Alternative Concepts:
– Brominated capsules, wetted foam capsules, mandrel
development for high temp coatings, metrology though hi-Z
capsules
Future Developments
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• Over 100 students have interned
at GA
• Approx. 1/3 have become staff
members at GA or National
Laboratories
Finding Future Fabricators: Over 100 Students Have
Interned at GA
Evan Ostrowski monitors process variables of a
glow discharge polymer (GDP) coater
Daniel Dudt presents his poster describing his
robotic planar assembly work at General AtomicsHolly Ubellacker developed method to accurately
determine oxygen content using Auger Spectroscopy
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• Support the ICF Program Framework
• Provide a wide range of capabilities
• Develop to meet new challenges
• Engage and develop future fabricators
Summary: GA Continues to Support DOE/NNSA Stockpile
Stewardship Program
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Review of GA Target Fabrication
Questions?
