precision high energy liner implosion experiments – phelix
DESCRIPTION
Precision High Energy Liner Implosion Experiments – PHELIX. W.A. Reass, D.M. Baca, J.R. Griego R.E. Reinovsky, C.L. Rousculp, and P.J. Turchi Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545. Outline. System Description Pulse Power Electrical Modeling Results - PowerPoint PPT PresentationTRANSCRIPT
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Precision High Energy LinerImplosion Experiments –
PHELIX
W.A. Reass, D.M. Baca, J.R. GriegoR.E. Reinovsky, C.L. Rousculp, and P.J. Turchi
Los Alamos National Laboratory, P.O. Box 1663,Los Alamos, NM 87545
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Outline
• System Description• Pulse Power Electrical• Modeling Results• Marx Configuration• P-rad Facility• Transformer Design• System Configuration• Conclusion
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
System Description
• PHELIX is megajoule sized transformer coupled pulse power system– 8 marx modules
• System to drive hydrodynamic line experiments with a nominal current capability of 10 megamperes
– Will drive liners to 4 km/s
– Present budget limits us to ½ size for start up (5 megamperes, 480 kJ)
– Multi-framing capability with proton radiography at “LANSCE” accelerator
– Radial xradiography
• Marx banks utilize the “Atlas” plastic case 60 kV, 60 kJ capacitors and railgaps
• 4:1 multi-filar toroidal air-core transformer is mechanically part of a circular disc line
– Results in an attractive inductance budget
• Small reusable system very economical
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Pulse Power Designs to be Conservative
• System to use proven Atlas Capacitors and Railgaps– Resistive damping to limit fault currents
• 120 kV operation in air was proven in Atlas test fixture– Many thousands (50,000) of successful shots
• System to interconnect with RG-217 cable and integral part of transformer
• Bank damping to use Reticulated Vitreous Carbon (RVC) Foam Resistors– Tested to 850 kA, 17 kA / cm2– Tested to 120 kV and 130 J / cc
• Capacitor Lifetime ~500 Shots with 55% reversal– System to operate ~40% reversal
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Lp
Ip Is
Rp Rs
L1 L0
Ls
MHDMODULE
R=109
RAVEN MODELING
• Spice like network input file
• Couples to MHD module optimized for cylindrical hydrodynamics
• Lp and Ls are transformer inductances– Includes coupling and leakage
• Li and Lo are uncoupled inductances
• Better than 10 MA to “liner” for 960 kJ– For 8 parallel marx modules
– 120 kJ / 120 kV / module
– ~30% reversal
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Extensive Capacitor Test Program Proved Lifetimes Better Than Predicted
LANL Qualification Life Test Data
No. of Units
Failed/ Good
Normal C/D
Cycles
Fault C/D
Cycles
Normalized Total
1 Failed 8150 81501 Good 7600 76001 Failed 6200 62002 Good 4000 300 46535 Good 4000 4000
• Nominal life is 2,400 shots @ 15% reversal
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
8 Marx Model Results Indicated Physics Goals Achieved with Adequate Damping
Bank Voltage (~55% reversal) Primary and Secondary Current (MA)
500 kA module current, 50 kA cable
~12.5 MA
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
VIEW OF DUAL MARX RACK
Switching / Charging Assemblies Output / Damping Resistor Assemblies
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
VIEW OF TRANSFORMER
Base Plate ~ 1M dia(secondary)
Post hole convolute
Secondary 18º segment
Primary 18º segment
Load Cassette
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
VIEW OF TRANSFORMER PRIMARY AND SECONDARY WINDING SEGMENTS
Secondary 18ºsegment
Contact lands
“Printed” Winding (Test) Assembly
“Printed” primary 18º segment
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
TRANSFORMER SUBASSEMBLIES
Detail of Power Flow Region
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
BUNKER TEST AREA
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Compact Mechanical Design Accommodates P-rad Operational Requirements
• Capacitor bank, charging system, gas handling system, trigger system, control I/O, and hydrodynamic load on transportable trolley
• Supports for torus alignment to concrete floor
• P-rad beam-line installation when required
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Aluminum Mechanical Enclosure Gives Required Electrical and Mechanical Safety
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Entrance to LANSCE P-rad Facility
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Remote Control
• Interface and remote I/O (All Fiber Optic)– Accelerator timing hand-shake
– Machine control / diagnostic hand-shake
• Trigger system
• Charging system
• Gas handling system
– Experimental diagnostics hand-shake
– Personnel protection interlocks
• Utility input power well filtered
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PHELIX
Operated by Los Alamos National Security, LLC for the U.S. Department of Energy’s NNSA LAUR-09-05753
U N C L A S S I F I E D
Conclusion
• Engineering and physics goals can be readily accomplished
• Systems fabrication with proven hardware and technique
• Design can meet all safety requirements
• Low operational costs will permit high shot rates
• With high shot rates and P-rad multi-framing capability, design tools can be more easily verified and validated
• PHELIX design is high performance, produces 10MA/MJ vs. 1MA/MJ for bigger machines such as ATLAS, SHIVA STAR, AND PEGASUS
• Experimentation to start this year