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Fusion product diagnostics planned for Large Helical Device deuterium experiment.

M Isobe1, H Yamanishi, M Osakabe

  • 1National Institute for Fusion Science, Toki 509-5292, Japan. isobe@nifs.ac.jp

The Review of Scientific Instruments
|November 2, 2010
PubMed
Summary

The Large Helical Device (LHD) will feature new fusion product diagnostics for its deuterium experiments. These systems will monitor neutron and gamma-ray emissions to understand fusion reactions.

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Area of Science:

  • Fusion energy research
  • Plasma physics
  • Nuclear instrumentation

Background:

  • The National Institute for Fusion Science is planning deuterium experiments on the Large Helical Device (LHD).
  • Accurate measurement of fusion products is crucial for understanding plasma behavior and optimizing fusion reactors.

Purpose of the Study:

  • To describe the fusion product diagnostics systems planned for the LHD deuterium experiment.
  • To detail the instrumentation for measuring neutron and gamma-ray emissions.

Main Methods:

  • Installation of a time-resolved neutron yield monitor using neutron gas counters.
  • Deployment of a time-integrated neutron yield monitor utilizing activation techniques.
  • Implementation of a multicollimator scintillation detector array for spatial neutron emission rate diagnosis.
  • Inclusion of a 2.5 MeV neutron spectrometer and a 14 MeV neutron counter.
  • Integration of prompt gamma-ray diagnostics.

Main Results:

  • The planned diagnostics cover a comprehensive suite of measurements for fusion products.
  • The systems are designed for both time-resolved and time-integrated measurements.
  • Spatial distribution of neutron emission rate will be diagnosed.

Conclusions:

  • The proposed diagnostics systems will provide essential data for the LHD deuterium experiments.
  • These advanced diagnostics are critical for advancing fusion energy research on the LHD.
  • The comprehensive measurement capabilities will enhance the understanding of fusion processes.