Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Total fusion yield measurements using deuterium–tritium gamma rays

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/5.0055846· OSTI ID:1829647
The deuterium–tritium (DT) fusion reaction, D(T,γ)5He , has a rare (4.2 ×105 ) branching ratio that releases a ~16 MeV gamma ray instead of the more common 14.1 MeV fusion neutron. These fusion gamma rays can be used as a complementary source of measuring the net fusion yield of experiments. Fusion gamma rays have the advantage of having negligible Doppler broadening, being isotropic and less down-scattered compared to fusion neutrons. At the National Ignition Facility, we measured the DT fusion gamma rays by the Gamma Reaction History diagnostic that thresholds to only measure >10 MeV gamma rays. After removing a ~12% contribution from neutron capture interactions in deuterium, D(n,γ)T , and carbon, 12C(n,γ)13C , the deviation between GRH measurements and neutron-based yield measurements has been reduced to 10%. Further improvements are needed for detailed physics comparison.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001; AC52-07NA27344
OSTI ID:
1829647
Alternate ID(s):
OSTI ID: 1843561
Report Number(s):
LA-UR--21-21896; LLNL-JRNL--825430
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 28; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (36)

Measurement and application of DDγ, DTγ and D3Heγ reactions at low energy journal May 1985
Energy levels of light nuclei A = 13–15 journal February 1991
Quantitative comparison between experimental and simulated gamma-ray spectra induced by 14MeV tagged neutrons journal July 2012
Conceptual studies of gamma ray diagnostics for DEMO control journal November 2018
Comparison of ablators for the polar direct drive exploding pusher platform journal March 2021
ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data journal December 2011
Diagnosing ignition with DT reaction history journal October 2008
Cherenkov radiation conversion and collection considerations for a gamma bang time/reaction history diagnostic for the NIF journal October 2008
Diagnosing inertial confinement fusion gamma ray physics (invited) journal October 2010
D-T gamma-to-neutron branching ratio determined from inertial confinement fusion plasmas journal May 2012
Neutron activation diagnostics at the National Ignition Facility (invited) journal October 2012
Enhanced NIF neutron activation diagnostics journal October 2012
Monte Carlo validation experiments for the gas Cherenkov detectors at the National Ignition Facility and Omega journal July 2013
Conceptual design of the gamma-to-electron magnetic spectrometer for the National Ignition Facility journal November 2014
Fusion alpha-particle diagnostics for DT experiments on the joint European torus
  • Kiptily, V. G.; Beaumont, P.; Belli, F.
  • FUSION REACTOR DIAGNOSTICS: Proceedings of the International Conference, AIP Conference Proceedings https://doi.org/10.1063/1.4894029
conference January 2014
Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility journal July 2016
Gamma-ray spectroscopy at MHz counting rates with a compact LaBr3 detector and silicon photomultipliers for fusion plasma applications journal August 2016
Development and modeling of a polar-direct-drive exploding pusher platform at the National Ignition Facility journal July 2018
Velocity correction for neutron activation diagnostics at the NIF journal October 2018
Using multiple neutron time of flight detectors to determine the hot spot velocity journal October 2018
Improved inertial confinement fusion gamma reaction history 12 C gamma-ray signal by direct subtraction journal November 2019
Carbon ablator areal density at fusion burn: Observations and trends at the National Ignition Facility journal May 2020
The Spatially Distributed Neutron Activation Diagnostic FNADs at the National Ignition Facility journal May 2017
Overview of ITER-FEAT - The future international burning plasma experiment journal October 2001
Diagnosing implosion performance at the National Ignition Facility (NIF) by means of neutron spectrometry journal March 2013
Gamma ray diagnostics of high temperature magnetically confined fusion plasmas journal July 2006
Indirect drive ignition at the National Ignition Facility journal October 2016
Development of Enhanced, Permanently-Installed, Neutron Activation Diagnostic Hardware for NIF journal May 2016
First spectral measurement of deuterium-tritium fusion γ rays in inertial fusion experiments journal August 2021
Radiative neutron capture by deuterium journal August 1986
Measurement of the C 12 (n, γ 0 ) 13 C cross section in the giant dipole resonance region journal February 1987
C 12 ( n , γ 0 ) 13 C cross section in the 8–11 MeV region journal June 1990
Determination of the deuterium-tritium branching ratio based on inertial confinement fusion implosions journal June 2012
Diagnostic signature of the compressibility of the inertial-confinement-fusion pusher journal February 2020
Development of the real-time neutron activation diagnostic system for NIF conference September 2017
Benchmark Test of 14-MeV Neutron-Induced Gamma-Ray Production Data in JENDL-3.2 and FENDL/E-1.0 through Analysis of the OKTAVIAN Experiments journal June 1996

Similar Records

Electronegative ligands enhance charge transfer to Mn12 single-molecule magnets deposited on graphene
Journal Article · Tue Feb 11 19:00:00 EST 2020 · Journal of Applied Physics · OSTI ID:1601768

Hamiltonian formulations for perturbed dissipationless plasma equations
Journal Article · Tue Dec 22 19:00:00 EST 2020 · Physics of Plasmas · OSTI ID:1851859