Using millimeter-sized carbon-deuterium foils for high-precision deuterium-tritium neutron spectrum measurements in direct-drive inertial confinement fusion at the OMEGA laser facility

Dataset · Wed Feb 17 04:00:00 EST 2021

DOI:https://doi.org/10.7910/DVN/BNCGL4· OSTI ID:1887577

Johnson, M. Gatu ^[1]; Aguirre, B.; Armstrong, J.; Fooks, J. A.; Forrest, C.; Frenje, J. A.; Glebov, V. Yu.; Hoppe, M.; Katz, J.; Knauer, J. P.; Martin, W.; Parker, C. E.; Reynolds, H. G.; Schoff, M. E.; Séguin, F. H.; Sorce, C.; Sperry, B.; Stoeckl, C.; Petrasso, R. D.

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1. OSTI

Millimeter-sized CD foils fielded close (order mm) to inertial confinement fusion (ICF) implosions have been proposed as a game-changer for improving energy resolution and allowing time-resolution in neutron spectrum measurements using the magnetic recoil technique. This paper presents results from initial experiments testing this concept for direct drive ICF at the OMEGA laser facility. While the foils are shown to produce reasonable signals, inferred spectral broadening is seen to be high (~5 keV) and signal levels low (by ~20%) compared to expectation. Before this type of foil is used for precision experiments, the foil mount must be improved, oxygen uptake in the foils better characterized, and impact of uncontrolled foil motion prior to detection investigated.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: NA0003868
• OSTI ID: 1887577
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY