Tailored Beam Dump Absorbing Surfaces for Laser Energy
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Solution Overview
Problem
Conventional beam dumps in high-energy laser systems are not designed to accommodate non-uniform laser beam profiles, leading to uneven temperature distribution and potential operational issues, increased costs, and complex cooling systems.
Innovation Solution
The development of beam dumps with tailored absorbing surfaces that match the expected cross-sectional profiles of laser beams, using varying angles of incidence to distribute higher-intensity portions over a larger area, reducing maximum temperatures and allowing for the use of less expensive materials and simpler cooling systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional beam dumps use uniform absorbing surfaces, then manufacturing is simpler, but temperature distribution becomes uneven leading to operational issues
Solution Approach 1:
The absorbing surface is designed with varying angles of incidence across different regions to match the non-uniform laser beam profile. High-intensity regions receive surfaces with angles that spread the energy over larger areas, while low-intensity regions have different angles. This local customization of surface properties ensures uniform temperature distribution despite the complexity of the design.
2Reliability
If beam dumps are designed for non-uniform laser profiles, then temperature distribution improves, but manufacturing complexity increases
Solution Approach 1:
The design transforms the absorbing surface geometry by changing the angle of incidence parameter across different regions. This parameter variation is directly correlated to the laser beam intensity profile, allowing the surface to be manufactured with specific angular characteristics that optimize energy distribution and improve operational reliability.
3Temperature
If conventional cooling systems are used, then system design is simpler, but they cannot handle non-uniform heat distribution effectively
Solution Approach 1:
The absorbing surface is pre-designed with specific angle variations before the laser energy arrives. This preliminary geometric configuration ensures that non-uniform laser energy is distributed uniformly across the absorbing surface, preventing localized hot spots and enabling the use of simpler cooling systems that can handle uniform heat loads rather than complex systems needed for non-uniform cooling.
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 optimizes the beam dump design to evenly distribute laser energy, reducing maximum temperatures and potentially lowering costs by using less expensive materials and simplifying cooling systems, while maintaining effective energy absorption and thermal management.
Implementation Method 1
the absorbing surface is configured to absorb the laser energy and convert the laser energy into thermal energy
Data Source
AI summary
Laser energy has a non-uniform energy distribution in its profile such that at least one first portion of the laser energy is more intense than at least one second portion of the laser energy. The laser energy is absorbed using a beam dump having an absorbing surface, which converts the laser energy into thermal energy. A shape of the absorbing surface is based on the profile. At least one first portion of the absorbing surface has one or more first angles of incidence with respect to the laser energy and receives the first portion(s) of the laser energy. At least one second portion of the absorbing surface has one or more second angles of incidence with respect to the laser energy and receives the second portion(s) of the laser energy. The one or more first angles of incidence are larger than the one or more second angles of incidence.