20240013933. Passive Runaway Electron Mitigation Coil simplified abstract (MASSACHUSETTS INSTITUTE OF TECHNOLOGY)

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Passive Runaway Electron Mitigation Coil

Organization Name

MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor(s)

Darren T. Garnier of Melrose MA (US)

Robert S. Granetz of Newton MA (US)

Ryan M. Sweeney of Salem MA (US)

Passive Runaway Electron Mitigation Coil - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240013933 titled 'Passive Runaway Electron Mitigation Coil

Simplified Explanation

The abstract describes concepts, structures, and techniques for passive mitigation of relativistic electrons (referred to as "runaway" electrons) produced in a tokamak plasma. The invention is a passive runaway electron mitigation coil (REMC) that consists of an electrical conductor with a non-axisymmetric loop shape arranged along the surface of a torus in a toroidal direction. When energized by a disruption-induced voltage, the REMC generates a magnetic field that causes electrons to be lost more rapidly than they can form a runaway electron beam. The REMC is designed for outboard side mounting within a vacuum vessel.

  • The invention is a passive mitigation coil for controlling runaway electrons in a tokamak plasma.
  • The coil is a non-axisymmetric loop-shaped conductor arranged along the surface of a torus.
  • The coil is energized by a disruption-induced voltage to generate a magnetic field.
  • The resulting magnetic field stochasticity causes electrons to be lost faster than they can form a runaway electron beam.
  • The coil is mounted on the outboard side of a vacuum vessel.

Potential applications of this technology:

  • Controlling and mitigating runaway electrons in tokamak plasmas.
  • Enhancing the safety and stability of tokamak fusion reactors.
  • Improving the performance and efficiency of tokamak plasma confinement.

Problems solved by this technology:

  • Runaway electrons can cause damage to the plasma-facing components of a tokamak reactor.
  • Runaway electrons can lead to disruptions and instabilities in the plasma.
  • Runaway electrons can reduce the efficiency and performance of tokamak fusion reactors.

Benefits of this technology:

  • Passive mitigation approach reduces the reliance on active control methods.
  • Helps prevent damage to plasma-facing components and disruptions in the plasma.
  • Improves the overall safety, stability, and efficiency of tokamak fusion reactors.


Original Abstract Submitted

described are concepts, structures and techniques for passive mitigation of relativistic electrons produced in a tokamak plasma. these electrons may be referred to herein as “runaway” electrons (res). in embodiments, a passive runaway electron mitigation coil (remc) comprises an electrical conductor having a non-axisymmetric loop shape comprising a plurality of portions arranged along paths defined by the surface of a torus along a toroidal direction. in operation, the remc is energized by a disruption-induced voltage, and the resulting magnetic field stochasticity causes electrons to be lost more rapidly than a re beam can form. the remc is configured for outboard side mounting within a vacuum vessel.

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