Plasma Compression Toroidal Field Control
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Solution Overview
Problem
Maintaining the stability and confinement of plasma magnetic structure during compression is crucial for controlled thermonuclear fusion, as compressing plasma can destabilize the magnetic structure and disrupt confinement, making it essential to manage the ratio of toroidal to poloidal fields to ensure effective fusion.
Innovation Solution
A system and method that generate and compress magnetized plasma using a plasma generator and flux conserving chamber, where a central axial shaft provides a toroidal magnetic field, and a power source delivers formation and shaft power pulses to control the toroidal field ratio during compression, ensuring stability through independent control of current pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If plasma is compressed to increase density and energy for fusion, then fusion reaction rate improves, but plasma magnetic structure stability deteriorates
Solution Approach 1:
The system dynamically adjusts the toroidal magnetic field strength during compression by controlling the shaft current pulse timing and magnitude. The toroidal field is increased in proportion to the compression ratio to maintain a constant safety factor q, allowing the magnetic structure to adapt to changing plasma conditions and remain stable during compression
Solution Approach 2:
The invention changes the toroidal magnetic field parameter in response to plasma compression. By increasing the toroidal field strength as plasma density increases, the system maintains the safety factor q within stable ranges, resolving the contradiction between compression-induced density increase and magnetic structure stability
2Reliability
If toroidal magnetic field is increased to maintain stability during compression, then plasma confinement improves, but system complexity increases
Solution Approach 1:
The central axial shaft serves multiple functions: it provides structural support, acts as a current conductor to generate the toroidal magnetic field, and enables plasma compression through its interaction with the plasma generator. This multi-functionality reduces the need for separate components and simplifies the overall system
Solution Approach 2:
The central axial shaft acts as an intermediary element that couples the power source to the plasma. By conducting current through the shaft to generate the toroidal magnetic field, it mediates between the electrical power system and the plasma, simplifying the control architecture
3Power
If formation power pulse and shaft power pulse are provided simultaneously, then plasma generation is efficient, but control precision over toroidal field ratio deteriorates
Solution Approach 1:
The power delivery is segmented into two distinct pulses: a formation power pulse to generate plasma and a shaft power pulse to establish and maintain the toroidal magnetic field. This temporal segmentation allows independent optimization of each function and precise control of the toroidal to poloidal field ratio
Solution Approach 2:
The shaft power pulse is provided in advance or in coordination with the formation power pulse to establish the toroidal magnetic field before or during plasma generation. This preliminary action ensures the toroidal field is properly established and maintains the desired field ratio throughout the compression process
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 maintains the toroidal to poloidal field ratio, stabilizing the plasma magnetic structure during compression, enhancing plasma confinement and fusion efficiency by controlling the toroidal field to match the poloidal field changes, thereby preventing destabilization and improving energy confinement.
Implementation Method 1
a power source that comprises a formation power circuit configured to provide a formation power pulse to the plasma generator to ionize the injected gas and generate magnetized plasma
Implementation Method 2
a shaft power circuit configured to provide a shaft power pulse to the central axial shaft to generate a toroidal magnetic field into the plasma generator and the flux conserving chamber
Implementation Method 3
The magnetic field in the magnetized plasma confines plasma energy by suppressing the transit of heat and particles from the core of the plasma to its edge
Implementation Method 4
A plasma compression driver configured to compress the plasma trapped in the inner cavity
Data Source
AI summary
Examples of a system for generating and compressing magnetized plasma are disclosed. The system comprises a plasma generator with a first closed end and an outlet, and a flux conserving chamber that is in tight fluid communication with the outlet of the plasma generator such that the generated plasma is injected into an inner cavity of the flux conserving chamber. An elongated central axial shaft is also provided such that the central shaft extends through the outlet of the plasma generator into the flux conserver. The end of the central shaft in connected to the flux conserver. A power source that comprises a formation power circuit and a shaft power circuit is provided to provide a formation power pulse to the plasma generator to generate magnetized plasma, and a shaft power pulse to the central axial shaft to generate a toroidal magnetic field into the plasma generator and the flux conserving chamber. The duration of the shaft power pulse is longer than the duration of the formation power pulse to maintain plasma q-profile at a pre-determined range. During plasma compression the shaft power pulse is increased to match the raise of the plasma poloidal field due to the compression and thus maintain the q-profile of the plasma.