Neutron imaging of the deuterium–tritium tamping gas volume in an inertial confinement fusion hohlraum
To benchmark the accuracy of the models and improve the predictive capability of future experiments, the National Ignition Facility requires measurements of the physical conditions inside inertial confinement fusion hohlraums. The ion temperature and bulk motion velocity of the gas-filled regions of the hohlraum can be obtained by replacing the helium tamping gas in the hohlraum with deuterium-tritium (DT) gas and measuring the Doppler broadening and Doppler shift of the neutron spectrum produced by nuclear reactions in the hohlraum. To understand the spatial distribution of the neutron production inside the hohlraum, we have developed a new penumbral neutron imager with a 12 mm diameter field of view using a simple tungsten alloy spindle. We performed the first experiment using this imager on a DT gas-filled hohlraum and successfully obtained the spatial distribution of neutron production in the hohlraum plasma. We will report on the design of the spindle, characterization of the detectors, and methodology of the image reconstruction.
Authors
- T. Chapman (ORCID: https://orcid.org/0000-0001-7404-0927)
- B. N. Woodworth (ORCID: https://orcid.org/0000-0002-0953-1372)
- Cory Waltz (ORCID: https://orcid.org/0000-0002-7013-6021)
- D. J. Schlossberg (ORCID: https://orcid.org/0000-0002-8713-9448)
- Timothy G. Sarginson
- T. M. Briggs
- Kelly Hahn
- S. Kerr (ORCID: https://orcid.org/0000-0003-4822-564X)
- R L Reynolds
- A. S. Moore (ORCID: https://orcid.org/0000-0002-2125-8882)
- N. Izumi (ORCID: https://orcid.org/0000-0003-1114-597X)
- S. Vonhof (ORCID: https://orcid.org/0000-0002-0541-1058)
- D. N. Fittinghoff (ORCID: https://orcid.org/0000-0002-6089-8911)
- J. M. Gjemso
- J. P. Holder (ORCID: https://orcid.org/0000-0003-1833-4001)
- A. J. Mackinnon (ORCID: https://orcid.org/0000-0002-4380-2906)
- Rafael Ramı́rez (ORCID: https://orcid.org/0000-0001-7075-8405)
- S. Rogers (ORCID: https://orcid.org/0009-0008-0023-7581)
- William Riedel (ORCID: https://orcid.org/0000-0002-2641-8726)
- A. Kemp (ORCID: https://orcid.org/0000-0003-4518-6382)
- N. Roskopf (ORCID: https://orcid.org/0009-0008-3259-8920)
- B. L. Reichelt (ORCID: https://orcid.org/0000-0001-8118-606X)
- Ruben M. Sandoval (ORCID: https://orcid.org/0000-0002-3660-2092)
- P. L. Volegov (ORCID: https://orcid.org/0000-0003-0361-7500)
- A. E. Youmans (ORCID: https://orcid.org/0009-0004-9154-9679)
- D. M. Holunga (ORCID: https://orcid.org/0000-0003-1101-2448)
- B. M. Haines (ORCID: https://orcid.org/0000-0002-3889-7074)
- J. S. Ross (ORCID: https://orcid.org/0000-0003-4519-5238)
- D. E. Hinkel (ORCID: https://orcid.org/0000-0002-0585-5732)
- D. P. Higginson (ORCID: https://orcid.org/0000-0002-7699-3788)
- J. D. Moody (ORCID: https://orcid.org/0000-0003-3132-0122)
- Nathan D. Masters (ORCID: https://orcid.org/0000-0001-9877-3500)
- M. D. Rosen (ORCID: https://orcid.org/0000-0002-0882-4528)
- Thomas J. Cunningham (ORCID: https://orcid.org/0000-0003-1966-2955)
- Rtf Cheung
- Christopher R. Hardy
Institutions
- Lawrence Livermore National Laboratory (US)
- Los Alamos National Laboratory (US)
- General Atomics (United States) (US)
- Massachusetts Institute of Technology (US)
Publication Details
- Journal
- Review of Scientific Instruments
- Published
- 2024-10-01
- DOI
- https://doi.org/10.1063/5.0219564
- Citations
- 2
- Primary Topic
- Nuclear Physics and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.22