Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility
Abstract
We report that neutron imaging provides a ready measurement of the shape of the “hot spot” core of an inertial confinement fusion implosion. The 14-MeV neutrons emitted by deuterium-tritium reactions are imaged at the National Ignition Facility using a pinhole array onto a scintillator, and the images are recorded on a camera. By changing the gate time of the camera, lower energy neutrons, downscattered by the cold fuel surrounding the hot spot, are recorded. The cold fuel density can be reconstructed using the two images. The kinematics of the scattering coupled with the scattering cross sections restrict the angular extent of the cold fuel sampled, with the backside of the implosion not being sampled at all. This work demonstrates the limited region of the cold fuel measured by the current line of sight (40%). Finally, at completion of the three planned lines of sight, 79% of the cold fuel will be sampled.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1482000
- Alternate Identifier(s):
- OSTI ID: 1478679
- Report Number(s):
- LA-UR-18-23951
Journal ID: ISSN 0034-6748
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 10; Conference: High Temperature Plasma Diagnostics ; 2018-04-16 - 2018-04-19 ; San Diego, California, United States; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Batha, S. H., Volegov, P. L., Fatherley, V. E., Geppert-Kleinrath, V., and Wilde, C. H.. Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility. United States: N. p., 2018.
Web. doi:10.1063/1.5038815.
Batha, S. H., Volegov, P. L., Fatherley, V. E., Geppert-Kleinrath, V., & Wilde, C. H.. Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility. United States. https://doi.org/10.1063/1.5038815
Batha, S. H., Volegov, P. L., Fatherley, V. E., Geppert-Kleinrath, V., and Wilde, C. H.. Wed .
"Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility". United States. https://doi.org/10.1063/1.5038815. https://www.osti.gov/servlets/purl/1482000.
@article{osti_1482000,
title = {Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility},
author = {Batha, S. H. and Volegov, P. L. and Fatherley, V. E. and Geppert-Kleinrath, V. and Wilde, C. H.},
abstractNote = {We report that neutron imaging provides a ready measurement of the shape of the “hot spot” core of an inertial confinement fusion implosion. The 14-MeV neutrons emitted by deuterium-tritium reactions are imaged at the National Ignition Facility using a pinhole array onto a scintillator, and the images are recorded on a camera. By changing the gate time of the camera, lower energy neutrons, downscattered by the cold fuel surrounding the hot spot, are recorded. The cold fuel density can be reconstructed using the two images. The kinematics of the scattering coupled with the scattering cross sections restrict the angular extent of the cold fuel sampled, with the backside of the implosion not being sampled at all. This work demonstrates the limited region of the cold fuel measured by the current line of sight (40%). Finally, at completion of the three planned lines of sight, 79% of the cold fuel will be sampled.},
doi = {10.1063/1.5038815},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {Wed Oct 24 00:00:00 EDT 2018},
month = {Wed Oct 24 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
Works referenced in this record:
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Works referencing / citing this record:
Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas
journal, January 2020
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- Plasma Physics and Controlled Fusion, Vol. 62, Issue 2
Figures / Tables found in this record: