Diagnosing residual motion via the x-ray self emission from indirectly driven inertial confinement implosions

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4890259· OSTI ID:22308647

Field, J. E.; Benedetti, L. R.; Caggiano, J.; Hatarik, R.; Izumi, N.; Khan, S. F.; Ma, T.; Spears, B. K.; Town, R. P. J.; Bradley, D. K. ^[1]; Knauer, J. ^[2]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Laboratory for Laser Energetics, Rochester, New York 14623 (United States)

In an indirectly driven implosion, non-radial translational motion of the compressed fusion capsule is a signature of residual kinetic energy not coupled into the compressional heating of the target. A reduction in compression reduces the peak pressure and nuclear performance of the implosion. Measuring and reducing the residual motion of the implosion is therefore necessary to improve performance and isolate other effects that degrade performance. Using the gated x-ray diagnostic, the x-ray Bremsstrahlung emission from the compressed capsule is spatially and temporally resolved at x-ray energies of >8.7 keV, allowing for measurements of the residual velocity. Here details of the x-ray velocity measurement and fitting routine will be discussed and measurements will be compared to the velocities inferred from the neutron time of flight detectors.

• OSTI ID: 22308647
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BREMSSTRAHLUNG
CAPSULES
HEATING
IMPLOSIONS
INERTIAL CONFINEMENT
KEV RANGE
KINETIC ENERGY
NEUTRON DETECTORS
PERFORMANCE
TARGETS
THERMONUCLEAR REACTIONS
TIME-OF-FLIGHT METHOD
VELOCITY
X-RAY EMISSION ANALYSIS