Neutron temporal diagnostic for high-yield deuterium-tritium cryogenic implosions on OMEGA

Stoeckl, C.; Boni, R.; Ehrne, F.; Forrest, C. J.; Glebov, V. Yu.; Katz, J.; Lonobile, D. J.; Magoon, J.; Regan, S. P.; Shoup, III, M. J.; Sorce, A.; Sorce, C.; Sangster, T. C.; Weiner, D.

doi:10.1063/1.4948293

Title: Neutron temporal diagnostic for high-yield deuterium-tritium cryogenic implosions on OMEGA

Journal Article · Tue May 10 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4948293· OSTI ID:1256424

Stoeckl, C. ^[1]; Boni, R. ^[1]; Ehrne, F. ^[1]; Forrest, C. J. ^[1]; Glebov, V. Yu. ^[1]; Katz, J. ^[1]; Lonobile, D. J. ^[1]; Magoon, J. ^[1]; Regan, S. P. ^[1]; Shoup, III, M. J. ^[1]; Sorce, A. ^[1]; Sorce, C. ^[1]; Sangster, T. C. ^[1]; Weiner, D. ^[1]

Univ. of Rochester, Rochester, NY (United States)

A next-generation neutron temporal diagnostic (NTD) capable of recording high-quality data for the highest anticipated yield cryogenic DT implosion experiments was recently installed at the Omega Laser Facility. A high-quality measurement of the neutron production width is required to determine the hot-spot pressure achieved in inertial confinement fusion experiments—a key metric in assessing the quality of these implosions. The design of this NTD is based on a fast-rise-time plastic scintillator, which converts the neutron kinetic energy to 350- to 450-nm-wavelength light. The light from the scintillator inside the nose-cone assembly is relayed ~16 m to a streak camera in a well-shielded location. An ~200× reduction in neutron background was observed during the first high-yield DT cryogenic implosions compared to the current NTD installation on OMEGA. An impulse response of ~40±10 ps was measured in a dedicated experiment using hard x rays from a planar target irradiated with a 10-ps short pulse from the OMEGA EP laser. Furthermore, the measured instrument response includes contributions from the scintillator rise time, optical relay, and streak camera.

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Research Organization:: Univ. of Rochester, NY (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: NA0001944

OSTI ID:: 1256424

Alternate ID(s):: OSTI ID: 1252338

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 5; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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Analysis of trends in experimental observables: Reconstruction of the implosion dynamics and implications for fusion yield extrapolation for direct-drive cryogenic targets on OMEGA Bose, A.; Betti, R.; Mangino, D. Physics of Plasmas, Vol. 25, Issue 6 https://doi.org/10.1063/1.5026780	journal	June 2018
Theory of alpha heating in inertial fusion: Alpha-heating metrics and the onset of the burning-plasma regime Christopherson, A. R.; Betti, R.; Howard, J. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5030337	journal	July 2018
Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA Mannion, O. M.; Glebov, V. Yu.; Forrest, C. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5037324	journal	October 2018
Impact of imposed mode 2 laser drive asymmetry on inertial confinement fusion implosions Gatu Johnson, M.; Appelbe, B. D.; Chittenden, J. P. Physics of Plasmas, Vol. 26, Issue 1 https://doi.org/10.1063/1.5066435	journal	January 2019
Fuel-ion diffusion in shock-driven inertial confinement fusion implosions Sio, Hong; Li, Chikang; Parker, Cody E. Matter and Radiation at Extremes, Vol. 4, Issue 5 https://doi.org/10.1063/1.5090783	journal	September 2019
Probing ion species separation and ion thermal decoupling in shock-driven implosions using multiple nuclear reaction histories Sio, H.; Larroche, O.; Atzeni, S. Physics of Plasmas, Vol. 26, Issue 7 https://doi.org/10.1063/1.5097605	journal	July 2019

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