Flexible Semiconductor Wafer for Pipe Wall Alpha Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting alpha-radioactive sources inside pipework are inefficient and costly, as they require multiple flat detectors positioned close to the pipe walls, which are expensive and cumbersome, and existing technologies rely on indirect detection mechanisms that are not sensitive to primary particles.
Innovation Solution
A flexible semiconductor wafer with a p-n junction is used, doped to form a p-n junction and coupled with an amplifier to detect charged particles, allowing for direct detection and adaptable to curved surfaces, such as the inside of pipes, and can be adapted for neutron detection by incorporating materials that produce charged particles when exposed to neutron flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple flat detectors are arranged around a PIG to detect alpha particles, then the detection coverage is improved, but the device complexity and cost increase significantly
Solution Approach 1:
Multiple discrete detector elements are merged into a single flexible semiconductor wafer with continuous detection surface. The wafer can be conformally mounted to wrap around the PIG, providing 360-degree coverage without requiring multiple separate detector components, thereby reducing system complexity while maintaining comprehensive detection coverage
Solution Approach 2:
The detector transitions from flat planar geometry to a flexible curved surface that can conform to cylindrical pipe geometry. The flexible semiconductor wafer can be bent and mounted to wrap around the PIG, enabling close proximity detection along curved surfaces without requiring multiple flat detectors positioned at various angles
2Device complexity
If the size of individual flat detectors is increased to reduce the number of detectors, then the device complexity is reduced, but the detection efficiency decreases due to greater average distance to pipe wall
Solution Approach 1:
The flexible semiconductor wafer can be conformally mounted to wrap around the PIG, maintaining a constant small distance between the detection surface and the pipe wall throughout the entire circumference. This curved geometry allows a single large-area detector to achieve both reduced complexity and maintained detection efficiency, as the conformal mounting ensures optimal proximity to the detection target along the entire curved surface
3Device complexity
If conventional indirect detection methods are used to detect alpha particles, then the detection mechanism is simpler, but the measurement precision and sensitivity are reduced
Solution Approach 1:
The patent replaces indirect detection mechanisms (such as scintillation or ionization chamber methods) with direct semiconductor detection. The flexible semiconductor wafer directly detects alpha particles through charge carrier generation in the depletion region, eliminating the need for intermediate conversion processes and providing superior sensitivity and direct measurement capability while maintaining relatively simple device 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
The flexible p-n junction detector provides efficient and cost-effective detection of charged particles, including alpha particles, with improved sensitivity and position-resolved information, reducing the need for multiple detectors and enabling detection within confined tubing without the need for segmenting pipes.
Implementation Method 1
the semiconductor wafer being doped to form a p-n junction... amplify a current or voltage across the p-n junction
Implementation Method 2
an amplifier coupled to the semiconductor wafer and configured to amplify a current or voltage across the p-n junction
Data Source
AI summary
A charged particle detector is provided. The charged particle detector includes a flexible semiconductor wafer, the semiconductor wafer being doped to form a p-n junction, and an amplifier coupled to the semiconductor wafer and configured to amplify a current or voltage across the p-n junction.