Characterization of a deuterium–deuterium plasma fusion neutron generator

R. F. Lang, J. Pienaar, E. Hogenbirk, D. Masson, R. Nolte, A. Zimbal, S. Röttger, M. L. Benabderrahmane, G. Bruno

Research output: Contribution to journalArticlepeer-review


We characterize the neutron output of a deuterium–deuterium plasma fusion neutron generator, model 35-DD-W-S, manufactured by NSD/Gradel-Fusion. The measured energy spectrum is found to be dominated by neutron peaks at 2.2 MeV and 2.7 MeV. A detailed GEANT4 simulation accurately reproduces the measured energy spectrum and confirms our understanding of the fusion process in this generator. Additionally, a contribution of 14.1MeV neutrons from deuterium–tritium fusion is found at a level of 3.5%, from tritium produced in previous deuterium–deuterium reactions. We have measured both the absolute neutron flux as well as its relative variation on the operational parameters of the generator. We find the flux to be proportional to voltage V3.32±0.14 and current I0.97±0.01. Further, we have measured the angular dependence of the neutron emission with respect to the polar angle. We conclude that it is well described by isotropic production of neutrons within the cathode field cage.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
StatePublished - Jan 21 2018


  • Deuterium–deuterium fusion
  • Inertial electrostatic confinement
  • Neutron generator

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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