X-ray-imaging spectrometer (XRIS) for studies of residual kinetic energy and low-mode asymmetries in inertial confinement fusion implosions at OMEGA (invited)

P J Adrian; B Bachmann; R Betti; A Birkel; P V Heuer; M Gatu Johnson; N V Kabadi; J P Knauer; J Kunimune; C K Li; O M Mannion; R D Petrasso; S P Regan; H G Rinderknecht; C Stoeckl; F H Séguin; A Sorce; R C Shah; G D Sutcliffe; J A Frenje

doi:10.1063/5.0101655

X-ray-imaging spectrometer (XRIS) for studies of residual kinetic energy and low-mode asymmetries in inertial confinement fusion implosions at OMEGA (invited)

Rev Sci Instrum. 2022 Nov 1;93(11):113540. doi: 10.1063/5.0101655.

Authors

P J Adrian¹, B Bachmann², R Betti³, A Birkel¹, P V Heuer³, M Gatu Johnson¹, N V Kabadi¹, J P Knauer³, J Kunimune¹, C K Li¹, O M Mannion⁴, R D Petrasso¹, S P Regan³, H G Rinderknecht³, C Stoeckl¹, F H Séguin¹, A Sorce³, R C Shah³, G D Sutcliffe¹, J A Frenje¹

Affiliations

¹ Plasma Science and Fusion Center, MIT, Cambridge, Massachusetts 02139, USA.
² Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
³ Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
⁴ Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.

PMID: 36461452
DOI: 10.1063/5.0101655

Abstract

A system of x-ray imaging spectrometer (XRIS) has been implemented at the OMEGA Laser Facility and is capable of spatially and spectrally resolving x-ray self-emission from 5 to 40 keV. The system consists of three independent imagers with nearly orthogonal lines of sight for 3D reconstructions of the x-ray emission region. The distinct advantage of the XRIS system is its large dynamic range, which is enabled by the use of tantalum apertures with radii ranging from 50 μm to 1 mm, magnifications of 4 to 35×, and image plates with any filtration level. In addition, XRIS is capable of recording 1-100's images along a single line of sight, facilitating advanced statistical inference on the detailed structure of the x-ray emitting regions. Properties such as P0 and P2 of an implosion are measured to 1% and 10% precision, respectively. Furthermore, T_e can be determined with 5% accuracy.