Fast Ignition Fusion System Nanosecond Picosecond Laser Design
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Solution Overview
Problem
Achieving sustained fusion reactions with net energy production remains a significant technical challenge in fusion energy generation, with existing methods facing issues of complexity, cost, and inefficiency in both inertial confinement fusion (ICF) and magnetic confinement fusion (MCF).
Innovation Solution
A high intensity pulse or CW laser generation system using a synchronized light source with a combination of nanosecond and picosecond laser beams for uniform compression and ignition of a boron or deuterium-tritium fuel target, employing a compact and spatially efficient design to reduce ignition temperature and achieve fusion reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inertial confinement fusion (ICF) or magnetic confinement fusion (MCF) methods are used to achieve sustained fusion reactions, then fusion energy production is possible, but the complexity, cost, and technical challenges increase significantly
Solution Approach 1:
The invention divides the laser system into two distinct components: nanosecond lasers for compression and picosecond lasers for ignition. This segmentation allows each laser type to be optimized for its specific function, reducing overall system complexity while achieving the desired fusion energy production.
Solution Approach 2:
The nanosecond lasers perform preliminary compression of the fuel target before the picosecond lasers deliver the ignition pulse. This preliminary action prepares the fuel in a state that requires lower ignition temperature and energy, thereby reducing the overall energy requirements and simplifying the ignition system.
2Power
If high energy lasers are used to compress and heat fuel targets for fusion reactions, then fusion reactions can be initiated, but the energy requirements and system size increase
Solution Approach 1:
The nanosecond lasers pre-compress the fuel target to high density before ignition, creating conditions that reduce the energy required for subsequent ignition by the picosecond lasers. This two-stage approach significantly lowers the total energy requirements compared to single-stage high-energy laser systems.
Solution Approach 2:
The invention changes the temporal parameters of laser delivery by using two different pulse durations (nanosecond and picosecond) and two different power densities. This parameter optimization allows efficient energy coupling at each stage, reducing overall energy waste and improving fusion reaction initiation efficiency.
3Temperature
If traditional laser fusion methods are used, then fusion reactions can occur, but the ignition temperature and energy input required are excessively high
Solution Approach 1:
The nanosecond lasers perform preliminary compression of the fuel target to achieve high density before ignition. This pre-compression reduces the ignition temperature requirement from billions of degrees to more manageable levels, thereby reducing the energy input needed from the picosecond ignition lasers.
Solution Approach 2:
The invention optimizes the temporal and spatial parameters of laser energy delivery by using nanosecond pulses for compression and picosecond pulses for ignition, with carefully controlled power densities. This parameter optimization reduces the ignition temperature requirement and associated energy input while maintaining effective fusion reaction initiation.
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 initiates and sustains fusion reactions with reduced energy requirements, offering advantages in size, weight, and cost, while potentially overcoming the technical challenges of existing fusion methods by achieving efficient fusion energy production.
Implementation Method 1
irradiating a fuel pellet uniformly and symmetrically with first laser beam having a first pulse power density emitted from a plurality of nanosecond laser light sources for a predetermined time to compress the target of the pellet uniformly and symmetrically
Implementation Method 2
irradiating the fuel pellet with a second laser beam having a second pulse power density emitted from a plurality of picosecond laser light sources to cause ignition of a fusion reaction
Implementation Method 3
cause ignition of a fusion reaction
Data Source
AI summary
According to the present invention, techniques including a system and method for a fusion reactor for initiating a fusion reaction are provided. The system includes a first laser beam configured for irradiating a fuel pellet with the first laser beam having a first pulse energy power density emitted from a plurality of nanosecond laser light sources for a predetermined time. The system also includes a second laser beam configured for irradiating the fuel pellet with the second laser beam having a second pulse energy power density emitted from a plurality of picosecond laser light sources to cause ignition of a fusion reaction.