Analysis of limited coverage effects on areal density measurements in inertial confinement fusion implosions

Gopalaswamy, Varchas; Betti, Riccardo; Radha, P. Bahukutumbi; Crilly, Aidan J.; Woo, Ka Ming; Lees, Aarne; Thomas, Cliff; Igumenshchev, Igor V.; Miller, Sam C.; Knauer, James P.; Stoeckl, Chrisitian; Forrest, Chad J.; Mannion, Owen M.; Mohamed, Zaarah L.; Rinderknecht, Hans G.; Heuer, Peter V. B.

doi:10.1063/5.0085942

Analysis of limited coverage effects on areal density measurements in inertial confinement fusion implosions

Journal Article · Thu Jul 14 00:00:00 EDT 2022 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0085942· OSTI ID:1877176

^[1]; Betti, Riccardo ^[1]; ^[1]; Crilly, Aidan J. ^[2]; ^[1]; ^[1]; Thomas, Cliff ^[1]; ^[1]; ^[1]; Knauer, James P. ^[1]; ^[1]; ^[1]; ^[3]; ^[1]; ^[1]; ^[1]

Univ. of Rochester, NY (United States)
Imperial College, London (United Kingdom)
Univ. of Rochester, NY (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Accurate diagnosis of areal density ($$\textit{ρR}$$) is critical for the inference of performance metrics in inertial confinement fusion implosions. One potential source of error in this diagnosis is the existence of low mode perturbations in the imploding target, which lead to asymmetries in the inference of the $$\textit{ρR}$$ from different lines of sight. Here, the error accrued as a result of limited coverage of the sphere due to a finite number of detectors is quantified, and the development of a forward scatter measurement from the OMEGA neutron time-of-flight detectors is motivated. In this work, a method by which the 1D-equivalent 4 π-averaged $$\langleρR\rangle$$ can be reconstructed, if accurate mode information can be diagnosed by other means, is validated.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Univ. of Rochester, NY (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: New York State Energy Research and Development Authority; USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003525; NA0003856

OSTI ID:: 1877176

Alternate ID(s):: OSTI ID: 1876245
OSTI ID: 1885769

Report Number(s):: SAND2022-9777J; 708385

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 29; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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