Flat Lamp for Photoionization Detector with Discharge Cavities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional photoionization detector lamps are difficult to mass-produce with uniform characteristics, limited in size adjustment, and unable to radiate vacuum ultraviolet from a wide surface, restricting sensitivity in photoionization sensors.
Innovation Solution
A flat type lamp design featuring plate members with discharge cavities and electrodes, where discharge gas is sealed between the plates to produce vacuum ultraviolet, allowing for easy size adjustment and uniform production, and a method involving plate preparation, cavity formation, sealing, and gas filling in a controlled environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional glass tube lamps are used for photoionization detectors, then the lamps can be manufactured with individual precision, but mass production with uniform characteristics becomes difficult
Solution Approach 1:
The lamp structure is divided into multiple plate members (first plate member with discharge cavities, second plate member for sealing) that can be separately manufactured and then assembled. This segmentation enables standardized mass production of individual components while maintaining uniform characteristics through precise manufacturing of each segment, followed by consistent assembly procedures.
2Volume of moving object
If the diameter of the glass tube is reduced to decrease lamp size, then compactness is improved, but the ability to evacuate the tube and inject discharge gas becomes limited
Solution Approach 1:
The invention transitions from a traditional cylindrical tube structure to a flat plate-based structure with discharge cavities. This dimensional change from 3D cylindrical to 2D planar geometry allows for compact size reduction while maintaining adequate volume for evacuation and gas injection through the cavity design, eliminating the diameter limitation of conventional tubes.
3Device complexity
If conventional tube lamps are used, then the structure is simple, but the ability to radiate vacuum ultraviolet from a wide surface is limited, restricting sensitivity
Solution Approach 1:
Multiple discharge cavities are integrated into a single lamp structure formed between plate members. This merging of multiple discharge regions into one unified lamp assembly increases the total surface area for vacuum ultraviolet radiation without significantly increasing overall device complexity, thereby improving sensitivity while maintaining structural simplicity.
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
Enables massive production of lamps with uniform characteristics, allows for size flexibility, and increases sensitivity by expanding the ionization cross-sectional area through wide surface radiation of vacuum ultraviolet.
Implementation Method 1
A photoionization phenomenon that is a kind of photoelectric effect in which an atom absorbing a photon emits an electron when light having a frequency over a predetermined level is given
Implementation Method 2
discharge gas filled in the plurality of discharge cavities and producing vacuum ultraviolet using electric force that is applied through the electrodes
Data Source
AI summary
A disclosed flat type lamp for a photoionization detector includes: a first plate member having a plate shape and having a first surface on which a plurality of discharge cavities is formed; a second plate member isolating the plurality of discharge cavities from the outside by being disposed and sealed on the first surface of the first plate member; electrodes disposed on the first and second plate members and arranged to face each other; and a discharge gas filled in the plurality of discharge cavities and producing vacuum ultraviolet using electric force that is applied through the electrodes.