Dielectric Tube Plasma System for Electrode Protection
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Solution Overview
Problem
In plasma systems, electrodes inside the reaction chamber are prone to damage due to contact with plasma particles, affecting plasma stability and product quality, and require expensive equipment to maintain constant pressure and high power for operation.
Innovation Solution
The positive and negative electrodes are separated from the reaction chamber, with plasma being emitted through plasma jet openings in a tube made of dielectric material, preventing direct contact with plasma particles and allowing for uniform plasma generation without electrode damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrodes are disposed inside the reaction chamber to generate plasma, then plasma generation is achieved, but the electrodes are polluted or eroded by plasma particles and become damaged
Solution Approach 1:
A dielectric tube is introduced as an intermediary component between the electrodes and the plasma reaction chamber. The tube allows plasma to pass through its wall while preventing direct contact between plasma particles and the electrodes, thus protecting the electrodes from erosion and pollution while maintaining plasma generation functionality
Solution Approach 2:
The system is divided into separate functional zones: the electrode assembly is separated from the reaction chamber by the dielectric tube. This segmentation allows the electrodes to generate plasma without being exposed to the harsh plasma environment, resolving the contradiction between plasma generation and electrode protection
2Power
If high power is used to drive plasma in constant-pressure system, then plasma generation is achieved, but heat problem such as electrode deformation occurs
Solution Approach 1:
The dielectric tube acts as a thermal barrier, isolating the electrodes from direct plasma contact and reducing heat transfer to the electrodes. This allows high power plasma generation while minimizing temperature rise and thermal deformation of the electrodes
3Reliability
If electrodes are separated from reaction chamber to prevent damage, then electrode durability is improved, but plasma generation mechanism changes
Solution Approach 1:
The dielectric tube with plasma jet openings serves as the intermediary that enables plasma generation without direct electrode-chamber contact. The tube wall allows plasma to pass through while maintaining the separation, providing a simple yet effective solution that doesn't significantly increase device complexity
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 prevents electrode erosion, maintains plasma stability, and allows for expanded plasma treatment range without the need for expensive high-power equipment, enabling efficient and uniform plasma application.
Implementation Method 1
A plasma gas passes through the first inlet and enters the first tube. The plasma passes through the plasma jet opening and is emitted to the outside of the first tube.
Implementation Method 2
a first tube (102) made of a dielectric material having a first inlet (108), a first plasma jet opening (110), a first end surface (112) and a second end surface (114)
Data Source
AI summary
A plasma system for generating a plasma is generated. The plasma system includes a tube, a positive electrode and a negative electrode. The tube has a plasma jet opening, a first end surface and a second end surface. The plasma jet opening penetrates the wall of the tube. The plasma passes through the plasma jet opening and is emitted to the outside of the tube. The positive electrode has a side surface facing and adjacent to the tube. The negative electrode is separated from the positive electrode by a first predetermined distance. The negative electrode has a negative electrode side surface facing and adjacent to the tube. The first positive electrode and the first negative electrode are disposed between the first end surface and the second end surface, and a portion of the plasma jet opening is disposed between the positive electrode and the negative electrode.