Photoelectric Surface Electron Source With Framed Extraction Electrode
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Solution Overview
Problem
The existing photoelectric-surface electron source structures face instability in the arrangement of extraction electrodes, leading to inconsistent electron beam characteristics due to improper fixation, which affects the extraction and trajectory of photoelectrons.
Innovation Solution
A photoelectric-surface electron source design featuring a substrate with a lens array, an extraction electrode with integral frame and electrode parts, and a surrounding electrode to stabilize the electric field, ensuring stable fixation and controlled electron trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the extraction electrode is disposed on the photoelectric surface, then photoelectrons can be extracted, but the arrangement stability is poor leading to unstable photoelectron extraction
Solution Approach 1:
The extraction electrode is divided into two functional parts: an electrode part with holes for electron passage and a frame part for mechanical fixation. This segmentation allows the frame part to provide stable mechanical support while the electrode part maintains electrical functionality, resolving the contradiction between extraction capability and arrangement stability.
Solution Approach 2:
The extraction electrode is positioned at a separated distance from the photoelectric surface rather than directly on it, creating a spatial buffer zone. This dimensional separation prevents direct contact instability while maintaining effective electron extraction through the holes in the electrode part, improving both stability and extraction reliability.
2Reliability
If the extraction electrode is not stably disposed on the photoelectric surface, then photoelectrons cannot be stably extracted, but adding fixation structures increases device complexity
Solution Approach 1:
The electrode part and frame part are merged into an integral extraction electrode structure, combining fixation functionality with electron extraction functionality in a single component. This integration reduces the number of separate parts and assembly steps while achieving stable electrode disposition and reliable photoelectron extraction simultaneously.
3Stability of the object's composition
If the electrode part is separated from the photoelectric surface, then stable fixation is achieved, but the distance control precision must be high
Solution Approach 1:
The frame part serves a dual function: it provides mechanical fixation stability and simultaneously defines the separation distance from the photoelectric surface through its geometric structure. This self-service approach allows the same component to address both fixation stability and distance control, reducing the need for additional precision-machining steps.
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 the stable extraction and focused emission of photoelectrons with desired beam characteristics, improving electron utilization efficiency and uniformity.
Implementation Method 1
a substrate configured to receive light incident from a substrate light-receiving surface and emit the light from a substrate main surface
Implementation Method 2
a photoelectric surface provided on the substrate main surface to receive the light to emit photoelectrons
Implementation Method 3
a lens part configured to focus the light toward the photoelectric surface
Implementation Method 4
an extraction electrode fixed to the substrate main surface to extract the photoelectrons from the photoelectric surface
Data Source
AI summary
A photoelectric-surface electron source includes: a glass substrate that receives laser light from a substrate light-receiving surface including microlenses and that focuses the laser light toward a substrate main surface located on the opposite side from the substrate light-receiving surface; a photoelectric surface that is provided to the substrate main surface, and that receives the focused laser light and emits photoelectrons; and an extraction electrode that is fixed to the substrate main surface and that extracts the photoelectrons from the photoelectric surface. The extraction electrode is disposed away from the photoelectric surface along the normal direction of the substrate main surface and has: an electrode part in which electrode holes for allowing the photoelectrons to pass therethrough are provided; and a frame part that is fixed to a region surrounding the photoelectric surface in the substrate main surface.