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Sustained Neutron Production from a Sheared-Flow Stabilized Z Pinch.

Y Zhang1, U Shumlak1, B A Nelson1

  • 1Aerospace & Energetics Research Program, University of Washington, Seattle, Washington 98195, USA.

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|April 24, 2019
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Summary
This summary is machine-generated.

The sheared-flow stabilized Z pinch experiment achieved sustained fusion neutron production for the first time. This breakthrough in fusion energy research offers promising results for future development.

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Area of Science:

  • Plasma Physics
  • Fusion Energy
  • Nuclear Engineering

Background:

  • Sheared-flow stabilized Z-pinch devices have shown potential for long-lived plasmas with fusion-relevant parameters.
  • Previous Z-pinch experiments have not achieved sustained neutron production.

Purpose of the Study:

  • To demonstrate sustained, quasi-steady-state neutron production from a fusion Z-pinch experiment.
  • To characterize the plasma conditions during neutron emission.

Main Methods:

  • Operation of a Z-pinch device using a 20% deuterium/80% hydrogen gas mixture.
  • Measurement of neutron emissions, pinch currents, plasma temperatures, and densities.
  • Utilizing integrated diagnostics for plasma characterization.

Main Results:

  • Reproducible observation of neutron emissions lasting approximately 5 microseconds.
  • Average neutron yield of (1.25±0.45)×10^5 neutrons/pulse.
  • Neutron yield scales with the square of the deuterium concentration.
  • Measured plasma temperatures of 1-2 keV and densities of ~10^17 cm^-3 at pinch radii of 0.3 cm.

Conclusions:

  • The sheared-flow stabilized Z pinch can achieve sustained fusion neutron production.
  • The experimental results validate the potential of Z-pinch devices for fusion energy applications.
  • Further research can optimize deuterium concentration and operational parameters for increased neutron yields.