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A new compact, high sensitivity neutron imaging system.

T Caillaud1, O Landoas, M Briat

  • 1CEA, DAM, DIF, F-91297 Arpajon, France. tony.caillaud@cea.fr

The Review of Scientific Instruments
|November 7, 2012
PubMed
Summary
This summary is machine-generated.

A new small neutron imaging system (SNIS) was developed for OMEGA laser facility experiments. This diagnostic system successfully imaged low-yield implosions with 54 μm resolution, improving neutron diagnostics.

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Area of Science:

  • Nuclear Fusion Diagnostics
  • Laser-Plasma Physics
  • Neutron Imaging

Background:

  • The OMEGA laser facility requires advanced diagnostics for low-yield fusion implosions.
  • Existing neutron imaging systems may lack the sensitivity for deuterium-fueled experiments.

Purpose of the Study:

  • To develop and test a new small neutron imaging system (SNIS) for OMEGA.
  • To achieve high-resolution neutron imaging of low-yield (10^9-10^10 neutrons) implosions.
  • To enhance the sensitivity and signal-to-noise ratio of neutron imaging.

Main Methods:

  • Utilized a penumbral coded aperture design for the SNIS.
  • Tested the SNIS on a rugby hohlraum energetics experiment at OMEGA.
  • Integrated a cooled CCD camera for improved sensitivity.
  • Calibrated the system using a linear accelerator and a Cobalt-60 gamma-ray source.

Main Results:

  • Successfully recorded a neutron image from a 1.4 × 10^10 yield implosion.
  • Achieved a spatial resolution of 54 μm at a distance of 4 meters from the target.
  • Demonstrated improved signal-to-noise ratio through raw binning detection with the cooled CCD camera.

Conclusions:

  • The SNIS is a viable diagnostic for low-yield fusion implosions on OMEGA.
  • The system provides valuable data for understanding fusion energetics.
  • Further improvements in sensitivity and resolution are achievable with advanced camera technology.