Target Fuel Capsule Rotation for Fusion Laser Heating
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Solution Overview
Problem
Achieving uniform and controlled heating of a target fuel capsule in fusion ignition is challenging due to hydrodynamic instabilities and tight engineering constraints, which increase costs and limit the effectiveness of existing methods like shock and fast ignition.
Innovation Solution
The target fuel capsule is rotated simultaneously about at least two axes to ensure uniform exposure to laser energy, using a target compensator system that adjusts its path and laser intensity with AI/ML control, ensuring balanced energy distribution and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the target fuel capsule is heated using traditional laser methods, then energy delivery is achieved, but uniform heating is difficult to accomplish due to hydrodynamic instabilities and tight engineering constraints
Solution Approach 1:
The patent applies the dynamics principle by rotating the target fuel capsule during the laser heating process. The capsule is mounted on a rotation stage that can spin it about an axis, allowing different portions of the capsule surface to be exposed to the laser beam at different times. This dynamic approach ensures more uniform energy distribution across the capsule surface, preventing localized overheating and hydrodynamic instabilities that would occur with static heating methods.
Solution Approach 2:
The patent implements periodic action through controlled rotation of the target capsule during laser irradiation. The capsule rotates at a controlled speed and orientation throughout the heating process, creating a periodic exposure pattern that distributes laser energy uniformly across the capsule surface. This periodic motion ensures that no single region receives excessive energy concentration, thereby improving heating uniformity and ignition reliability.
2Stability of the object's composition
If tight engineering constraints are applied to achieve spherical compression, then compression stability is improved, but costs increase and productivity decreases
Solution Approach 1:
The patent uses dynamic rotation of the target capsule to achieve uniform heating without requiring extremely tight engineering tolerances on spherical compression. By spinning the capsule during laser heating, the system compensates for minor imperfections in the compression sphere, allowing for more relaxed engineering constraints while maintaining heating uniformity. This reduces the cost and complexity of achieving stable spherical compression.
Solution Approach 2:
The patent changes the parameter of capsule orientation and position during the heating process. By rotating the capsule and adjusting its orientation relative to the laser beam, the system achieves uniform energy distribution even when the compression sphere has minor deviations from perfect sphericity. This parameter adjustment allows for relaxed engineering tolerances while maintaining effective heating.
3Ease of manufacture
If shock ignition or fast ignition is used to relax compression requirements, then engineering constraints are reduced, but capital investment and complexity increase
Solution Approach 1:
The patent applies a relatively simple dynamic rotation mechanism to the target capsule, which can be integrated into existing laser fusion systems. This rotation stage is a mechanical addition that does not require the complex shock ignition or fast ignition systems. The controlled rotation during laser heating achieves uniform energy distribution without needing the sophisticated timing and positioning systems required for shock or fast ignition methods.
Solution Approach 2:
The patent replaces complex ignition systems (shock ignition, fast ignition) with a simpler mechanical rotation system. Instead of using sophisticated temporal and spatial control of the laser beam or auxiliary shock/fusion drivers, the invention uses a mechanical rotation stage to orient the capsule during heating. This substitution reduces device complexity and capital investment while achieving the same goal of uniform heating.
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 approach enhances the uniformity of heating and energy distribution to the target fuel capsule, improving the chances of successful ignition and reducing costs by optimizing energy delivery.
Implementation Method 1
The target fuel capsule is rotated simultaneously about at least two axes to ensure uniform exposure to laser energy
Implementation Method 2
The target fuel capsule is rotated simultaneously about at least two axes to ensure uniform exposure to laser energy
Data Source
AI summary
A target compensator is provided for rotating a target fuel capsule within a target volume of a fusion ignition system. The target compensator includes a first frame rotatably connected to a mounting frame and a second frame rotatably connected to the first frame. A first drive is connected to the first frame to rotate the first frame relative to the mounting frame and a second drive is connected to the second frame to rotate the second frame relative to the first frame. The second frame includes a target holder to retain the target fuel capsule relative to the second frame. Rotation of the target fuel capsule about at least the first axis and the second axis enhances a uniformity of heating of the target fuel capsule. The target fuel capsule can be rotated by selective actuation of electromagnets in operable communication with magnets within the target fuel capsule.