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

Gatu Johnson, M.; 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.

doi:10.1063/5.0040549

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

Journal Article · Tue Feb 16 00:00:00 EST 2021 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0040549· OSTI ID:1810352

^[1]; Aguirre, B. ^[2]; Armstrong, J. ^[3]; ^[4]; Forrest, C. ^[3]; ^[1]; ^[3]; Hoppe, M. ^[4]; ^[3]; Knauer, J. P. ^[3]; Martin, W. ^[2]; ^[5]; ^[4]; ^[4]; Séguin, F. H. ^[1]; Sorce, C. ^[3]; Sperry, B. ^[1]; ^[3]; ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Texas A & M Univ., College Station, TX (United States). Cyclotron Inst.

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. Additionally, while the foils are shown to produce reasonable signals, inferred spectral broadening is seen to be high (~5 keV) and signal levels are 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 must be better characterized, and impact of uncontrolled foil motion prior to detection must be investigated.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; NA0003868

OSTI ID:: 1810352

Alternate ID(s):: OSTI ID: 1765905

Report Number(s):: SAND--2021-7219J; 697200

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 92; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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