SEGD Plasma Chamber Ventilation for Clear Spectroscopy
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Solution Overview
Problem
In Solution Electrode Glow Discharge (SEGD) apparatuses, vapor and liquid droplets interfere with light paths, reducing the effectiveness of spectroscopic analysis, and unfocused light reaches the light collection unit, further impairing analysis quality.
Innovation Solution
A plasma chamber with a ventilation unit creates an air curtain to remove vapor and droplets from the optical path, and a lens is used to direct and focus light onto a receiving unit for improved spectroscopic analysis, protecting the lens from splatter and allowing better light reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no ventilation is provided in the plasma chamber, then the structure remains simple, but vapor and liquid droplets accumulate in the optical path, interfering with light transmission and reducing spectroscopic analysis quality
Solution Approach 1:
The patent applies pneumatic principles by introducing a ventilation system that uses gas flow (air or inert gas) to remove vapor and liquid droplets from the optical path. The ventilation unit creates a controlled gas flow through the plasma chamber, carrying away interfering condensates and maintaining optical clarity without requiring complex mechanical moving parts
Solution Approach 2:
The ventilation system acts as an intermediary between the plasma generation process and the optical detection system. By introducing a gas flow field as a mediator, the system indirectly removes vapor and droplets that would otherwise directly interfere with light transmission, protecting the optical path without requiring direct contact between moving components and the plasma
2Measurement precision
If light is allowed to reach the collection unit without focusing, then the optical path remains simple, but unfocused light reduces the effectiveness of spectroscopic analysis
Solution Approach 1:
The patent employs a lens element with curved surfaces to focus the light from the plasma. The spherical or aspherical curvature of the lens surfaces refracts the diverging light rays from the plasma source, converging them to a focal point or focal plane where the light collection unit is positioned, thereby maximizing light intensity and spectral signal quality
Solution Approach 2:
The optical system is designed with the focusing lens positioned to receive light directly from the plasma source at the optimal point in the discharge process. The lens is pre-positioned to capture the maximum intensity of light emission before the plasma cools or the discharge terminates, ensuring that the brightest and most informative spectral signal is focused onto the detector
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 air curtain reduces vapor interference, and the lens ensures focused light reaches the analysis unit, enhancing the accuracy and effectiveness of spectroscopic analysis in SEGD apparatuses.
Implementation Method 1
The ventilation unit is configured to move air from outside the hollow body into the inlet, through a portion of the hollow body located between the viewing port and a gap between the solid electrode and the solution electrode, and out of hollow body from the outlet
Implementation Method 2
A glow discharge forms around the cathode and covers the cathode. The liquid 6 and materials 7 are converted directly into plasma upon exit from the liquid line 5
Implementation Method 3
The energy put into the system causes the energy of the materials 7 from the solution to undergo electronic transitions, as the electrons in the current bump electrons out of their orbit in the materials 7. When the electron returns to the orbit of the atom of the material 7, the electron throws off a photon, emitting light
Implementation Method 4
The plasma chamber comprises a lens at or near the viewing port, the lens being configured to collect light from the plasma and direct the light onto a light receiving unit
Implementation Method 5
The heat generated by the plasma (and Joule heating) can generate vapor from any pooling or extra liquid
Data Source
AI summary
A plasma chamber for containing a solution electrode glow discharge (SEGD) apparatus, the plasma chamber comprising a hollow body and a ventilation unit. The hollow body is configured to enclose a plasma generated between a solid electrode and a solution electrode, the hollow body comprising an inlet opening, an outlet opening, and at least one viewing port for letting light generated from the plasma leave the hollow body. The ventilation unit is configured to move air from outside the hollow body into the inlet, through a portion of the hollow body located between the viewing port and a gap between the solid electrode and the solution electrode, and out of hollow body from the outlet, thereby creating an air curtain for removal from an optical path between the plasma and the viewing port of at least some vapor created by vaporization of liquid in the plasma.