Gas Laser Chamber Electrode Geometry for High Pulse Energy
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Solution Overview
Problem
Existing gas laser apparatuses face challenges in achieving large pulse energy while minimizing the increase in length and maintaining gas flow speed due to the structure of the electrodes, which affects the cost and efficiency of laser light production.
Innovation Solution
The design of the electrodes includes a discharge section extending in a specific direction with spheroidal end surfaces and a shoulder section to rectify gas flow, allowing for increased discharge length without enlarging the chamber, and optionally incorporating insulating materials or coatings to prevent unwanted discharges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the discharge length is increased to achieve large pulse energy, then the pulse energy output is improved, but the laser chamber length increases which raises manufacturing cost
Solution Approach 1:
The end surface of the discharge section is designed as a spherical or elliptical curved surface instead of a flat surface. This curvature allows the discharge to extend further into the gas flow path, effectively increasing the discharge length and pulse energy output without proportionally increasing the overall chamber length, thus resolving the contradiction between power output and chamber dimensions
Solution Approach 2:
The discharge section extends not only in the direction between electrodes but also in the direction of gas flow due to the curved end surface. This multi-dimensional discharge configuration increases the effective discharge length without linearly increasing the chamber length in any single dimension, achieving higher pulse energy within compact dimensions
2Power
If the discharge section is extended to increase pulse energy, then the pulse energy output is improved, but the gas flow speed decreases which reduces efficiency
Solution Approach 1:
The spherical or elliptical end surface of the discharge section allows the discharge to follow the curved path of the gas flow more naturally. This configuration increases the discharge length without creating sharp edges or obstacles that would disrupt the gas flow, thereby maintaining gas flow speed while achieving higher pulse energy output
3Ease of manufacture
If a simple electrode structure is used to reduce manufacturing cost, then ease of manufacture is improved, but unwanted discharges occur which reduce reliability
Solution Approach 1:
The spherical or elliptical end surface design provides smooth curvature that naturally distributes the electric field, preventing field concentration at sharp edges that would cause unwanted discharges. This geometric feature enhances discharge control and reliability while maintaining manufacturing simplicity, as the curved surface can be achieved through standard machining or forming processes
Solution Approach 2:
The electrode may incorporate insulating materials or coatings on specific surfaces to prevent unwanted discharges while maintaining the simple overall structure. This composite approach enhances reliability by controlling discharge paths without significantly complicating the manufacturing 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
This configuration enables high pulse energy output without increasing the laser chamber's length and maintains gas flow speed, enhancing the efficiency and cost-effectiveness of the laser apparatus.
Implementation Method 1
a processor configured to control a power supply apparatus to cause a pair of electrodes to perform discharge
Implementation Method 2
a shoulder section disposed so as to surround a side surface of the discharge section
Data Source
AI summary
A laser chamber according to an aspect of the present disclosure is a laser chamber including a pair of electrodes disposed so as to face each other in a first direction, the laser chamber being configured such that a laser gas can be introduced into the laser chamber, at least one of the pair of electrodes including a discharge section extending in a second direction perpendicular to the first direction, and a shoulder section disposed so as to surround a side surface of the discharge section, a surface of the discharge section having a discharge surface extending in the second direction and an end surface provided at an end portion of the discharge section in the second direction, the end surface being a portion of a spheroid.