Converging Plasma Pistons for Magnetic Mirror Fusion

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Solution Overview

Problem

Magnetic confinement fusion systems face challenges in effectively confining and stabilizing plasma due to end losses in open-ended machines, which limits their ability to achieve and sustain thermonuclear fusion reactions.

Innovation Solution

A magnetic confinement system using converging plasma pistons to close the open ends of the magnetic field configuration, compress, and heat the target plasma, thereby reducing end leakage and enhancing plasma stability and fusion efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If open-ended magnetic field configuration is used, then device complexity is reduced, but plasma confinement is worsened due to end losses

Engineering Contradiction:

Improvemagnetic field configuration complexityVSAvoidplasma confinement

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The plasma confinement system is segmented into multiple components: the magnetic mirror device with open-ended field configuration, and separate plasma pistons that are injected to close the ends. This segmentation allows the magnetic field configuration to remain simple while the plasma pistons provide the necessary end closure to prevent plasma losses.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Plasma pistons serve as intermediary elements between the open-ended magnetic field configuration and the plasma. These pistons are injected into the magnetic mirror device to temporarily close the open ends, acting as mediators that prevent plasma escape while maintaining the simplicity of the underlying magnetic field structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If plasma pistons are injected to close open ends, then plasma confinement is improved, but device complexity increases

Engineering Contradiction:

Improveplasma confinementVSAvoidsystem structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The plasma pistons are injected periodically or on-demand to close the open ends of the magnetic field configuration only when needed for compression. This periodic action allows the system to maintain simple open-ended geometry during non-compression phases while achieving improved confinement during compression phases, thus managing complexity through temporal separation of functions.

Inventive Principle:

Principle #19Periodic action

3Productivity

If plasma compression and heating is increased, then fusion efficiency is improved, but plasma stability is worsened

Engineering Contradiction:

Improvefusion efficiencyVSAvoidplasma stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

Plasma pistons are injected and positioned in advance to close the magnetic field configuration before compression begins. This preliminary action ensures that the plasma is properly confined and stable before subjecting it to compression and heating, preventing instabilities that would arise from attempting compression in an open configuration.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes physical parameters dynamically: the magnetic field configuration transitions from open to effectively closed by plasma piston injection, and then compression parameters (density, temperature, pressure) are increased to achieve fusion conditions. These controlled parameter changes enable improved fusion efficiency while managing plasma stability through staged transformation.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively reduces plasma leakage, increases plasma confinement, and enhances fusion efficiency by compressing and heating the target plasma, potentially leading to a more practical and cost-effective nuclear fusion reactor design.

Implementation Method 1

a coil arrangement to generate a magnetic field configuration in the chamber to confine the target plasma in cylindrically-symmetric form in the chamber

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

the magnetic field is strengthened at the ends of the magnetic field configuration to form magnetic mirrors

Methodology Applied

Scientific EffectMagnetic mirror: Magnetic Field

Implementation Method 3

the plasma pistons converge towards each other to close the open ends of the magnetic field configuration and to compress and heat the target plasma

Methodology Applied

Scientific EffectCompression heating: Adiabatic Heating

Implementation Method 4

Methodology Applied

Scientific EffectMagnetic confinement: Magnetic Field

Data Source

PatentUS20240015876A1System Of Converging Plasma Pistons

Publication Date: 2024.01.11 UNIVERSITY OF NEW HAMPSHIRE

AI summary

A magnetic confinement system includes a magnetic mirror device that includes a chamber to hold a target plasma and a coil arrangement to generate a magnetic field configuration in the chamber to confine the target plasma in cylindrically-symmetric form in the chamber, the magnetic field configuration having open ends. The magnetic confinement system further includes plasma guns to generate plasma pistons and project the plasma pistons at the open ends of the magnetic field configuration. In operation, the plasma pistons converge towards each other to close the open ends of the magnetic field configuration and to compress and heat the target plasma.