Movable Guard Electrode for Electric Field Radiation Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric field radiation devices face challenges in performing regeneration processes of guard electrodes while suppressing field emission from emitters, leading to unstable electron beam dispersion and potential flashover phenomena, especially due to minute protrusions or adsorbed gases.
Innovation Solution
The device incorporates a movable guard electrode supporting unit that allows for changing the distance between the electron generating portion and the guard electrode, enabling regeneration processes without applying high voltage directly across the guard electrode, thereby suppressing field emission and stabilizing electron generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage is applied across the guard electrode to perform regeneration process, then the guard electrode surface is smoothed and adsorbed gases are released, but field emission occurs from the emitter and electron beam dispersion becomes unstable
Solution Approach 1:
The guard electrode is made movable relative to the emitter through a supporting unit that allows distance adjustment. During regeneration, the guard electrode is moved closer to the emitter to enable effective voltage discharge conditioning. During normal operation, it is positioned at a standard distance to maintain stable electron beam generation. This dynamic positioning resolves the contradiction by separating the regeneration function from the electron generation function in space and time.
Solution Approach 2:
The device is divided into functionally independent components: the emitter that generates electrons and the guard electrode that suppresses dispersion. By making the guard electrode movable and separable, the system can independently optimize each component's function - the emitter operates without interference during electron generation, while the guard electrode can be independently regenerated without affecting the emitter structure.
2Productivity
If the guard electrode is positioned close to the emitter for effective regeneration, then regeneration efficiency improves, but the risk of flashover phenomenon increases
Solution Approach 1:
The system dynamically adjusts the distance between the guard electrode and emitter based on the operational phase. During regeneration, the distance is minimized to maximize the effectiveness of voltage discharge conditioning. During normal operation, the distance is increased to a safe level that prevents flashover. This dynamic adjustment allows the system to achieve high regeneration efficiency without permanently exposing it to flashover risks.
Solution Approach 2:
Before performing regeneration, the system preliminarily positions the guard electrode close to the emitter and ensures proper vacuum conditions. This preliminary preparation allows the regeneration process to be performed efficiently when the electrode is in the optimal position, while preventing flashover by ensuring the close positioning is temporary and controlled only during the regeneration phase.
3Device complexity
If a fixed guard electrode structure is used, then the device structure is simple, but the regeneration process cannot be performed without causing field emission
Solution Approach 1:
The guard electrode supporting unit provides a relatively simple mechanical structure that enables dynamic positioning. Rather than complex active control systems, the invention uses a straightforward movable support mechanism that allows the guard electrode to be positioned at different distances from the emitter. This maintains structural simplicity while enabling the regeneration function that would be impossible with a completely fixed structure.
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 effectively smooths the guard electrode surfaces, releases adsorbed gases, and stabilizes electron generation, improving the device's withstand voltage performance and reducing the risk of flashover, while also simplifying the manufacturing process and reducing product costs.
Implementation Method 1
voltage is applied between an emitter (an electron source formed of carbon etc.) and a target which are positioned (which are separated at a predetermined distance) while facing to each other in a vacuum chamber of a vacuum enclosure, an electron beam is emitted by field emission (by generation of electrons and emission of the electrons) of the emitter
Implementation Method 2
the guard electrode supporting unit has bellows that can expand and contract in the both end directions of the vacuum chamber
Data Source
AI summary
Emitter (3) and target (7) are arranged so as to face each other in vacuum chamber (1), and guard electrode (5) is provided at outer circumferential side of electron generating portion (31) of emitter (3). Guard electrode (5) is supported movably in directions of both ends of vacuum chamber (1) by guard electrode supporting unit (6). To perform regeneration process of guard electrode (5), guard electrode (5) is moved to opening (22) side (to separate position) by operating guard electrode supporting unit (6), and a state in which field emission of electron generating portion (31) is suppressed is set, then by applying voltage across guard electrode (5), discharge is repeated. After performing regeneration process, by operating guard electrode supporting unit (6) again, guard electrode (5) is moved to opening (21) side (to emitter position), and a state in which field emission of electron generating portion (31) is possible is set.