Liquid Lithium First Walls for Fusion Plasma Control
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Solution Overview
Problem
Current methods for maintaining liquid lithium on the internal walls of fusion reactor chambers are inefficient, as they fail to accommodate complex shapes and discontinuities, and often require high flow rates or impractical placement of electrical coils, leading to instability and energy loss in fusion plasmas.
Innovation Solution
The use of high-temperature resistant, porous open-cell tiles with channels and an electrically charged liquid lithium circulation system, allowing lithium to flow and coat all internal surfaces, including those with complex shapes, while applying an electric charge to enhance plasma control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If liquid lithium is circulated at high flow rates to coat complex internal surfaces, then plasma stability is improved, but energy loss increases
Solution Approach 1:
The patent employs porous tiles with controlled porosity (30-70%) that allow liquid lithium to permeate and coat complex internal surfaces. The porous structure enables lithium distribution across irregular geometries without requiring high flow rates, thus maintaining plasma stability while reducing energy consumption associated with pumping.
Solution Approach 2:
The patent applies different tile configurations and porosity levels to specific regions of the reactor chamber based on local plasma conditions and surface geometry requirements. This localized approach ensures adequate lithium coverage where needed while minimizing overall lithium circulation requirements and associated energy losses.
2Stability of the object's composition
If electrical coils are placed close to the plasma for electromagnetic control, then plasma instability control is improved, but device complexity increases
Solution Approach 1:
The patent introduces liquid lithium as an intermediary substance that mediates between the plasma and the reactor wall. The lithium layer provides electromagnetic control and plasma stabilization functions without requiring complex coil systems directly facing the plasma, thereby reducing device complexity while maintaining control effectiveness.
Solution Approach 2:
The patent utilizes the electrical conductivity and magnetic properties of liquid lithium to achieve electromagnetic control. By controlling the flow rate, temperature, and electrical potential of the lithium, the system achieves plasma stabilization through parameter adjustment rather than complex structural modifications.
3Stability of the object's composition
If liquid lithium is used to face the plasma, then plasma stability is improved, but accommodating complex shapes and discontinuities becomes difficult
Solution Approach 1:
The patent uses porous tiles that can conform to complex internal surfaces and discontinuities. The porous structure allows liquid lithium to penetrate and coat irregular geometries effectively, enabling the system to accommodate complex reactor chamber shapes while maintaining continuous lithium coverage for plasma stability.
Solution Approach 2:
The patent divides the reactor wall into multiple modular tiles with varying porosity and geometric configurations. This segmentation allows each tile to be optimized for its specific location and shape requirements, enabling the overall system to accommodate complex surfaces while maintaining plasma-facing lithium coverage.
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
This solution effectively stabilizes the plasma by retaining lithium on all reactor surfaces, reducing radiative cooling, and allowing for efficient tritium production and contaminant removal, thereby improving plasma stability and energy output.
Implementation Method 1
a high-temperature resistant, porous open-cell material... the liquid lithium is circulated through an interior network of the tile(s) to allow for the liquid lithium to flow into the channels
Implementation Method 2
applying an electric charge to enhance plasma control... At least one voltage source is used to provide the electric charge
Implementation Method 3
high-temperature resistant, porous open-cell material... the interior network of the tile(s) and the channels of the tile(s) are manufactured from a high-temperature resistant, porous open-cell material
Data Source
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AI summary
A method, system, and apparatus are disclosed for liquid lithium first walls for electromagnetic control of plasmas in fusion power reactor environments. In particular, the method involves installing at least one layer of at least one tile on the surface area of the internal walls of the reactor chamber. A portion of the tile(s) facing the interior of the reactor chamber includes a plurality of channels. The method further involves applying an electric charge to the liquid lithium. Further, the method involves circulating the liquid lithium throughout the interior network of the tile(s) to allow for the liquid lithium to flow into the channels and to reach the external surface of the tile(s) that faces the interior of the reactor chamber. In some embodiments, the method also involves installing at least one magnetic coil between the tile(s) and the surface area of the internal walls of the reactor chamber.