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Related Experiment Videos

Gelina neutron target optimisation.

M Flaska1, A J M Plompen, W Mondelaers

  • 1EC-JRC-IRMM, Retieseweg 111, B-2440 Geel, Belgium. marek.flaska@cec.eu.int

Radiation Protection Dosimetry
|December 31, 2005
PubMed
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Researchers optimized the Geel Electron Linear Accelerator (GELINA) to improve neutron time spread for high-resolution measurements. Actinide targets and smaller geometries enhance neutron yield and resolution without compromising accuracy.

Area of Science:

  • Nuclear physics
  • Accelerator science
  • Neutron scattering

Background:

  • High-resolution neutron cross section measurements are crucial for nuclear data.
  • The Geel Electron Linear Accelerator (GELINA) is a powerful white neutron source.
  • Neutron time spread and intensity affect experimental accuracy, especially in the resonance region.

Purpose of the Study:

  • To reduce neutron time spread from GELINA without compromising neutron yield.
  • To optimize neutron source properties for high-energy resolution time-of-flight measurements.
  • To investigate the impact of target geometry and materials on neutron characteristics.

Main Methods:

  • Simulations using coupled electron-photon-neutron MCNP4C3 calculations (steady state and transient).

Related Experiment Videos

  • Benchmarking simulation code against existing target properties.
  • Determination of neutron yield, energy spectra, resolution functions, and spatial distributions for various configurations.

    • Main Results:

    • Actinide targets yield the highest neutron output at fixed accelerator power.
    • Smaller target geometries provide superior time resolution.
    • High-power density necessitates integrated optimization of thermal hydraulics and neutronics.

    Conclusions:

    • Optimized target materials (actinides) and geometries (smaller size) can significantly improve neutron time resolution and yield.
    • Joint optimization of thermal hydraulics and neutronics is essential for managing high-power densities.
    • The study provides a pathway for enhancing GELINA's capabilities for precise nuclear measurements.