Signal Data Processing for Semiconductor Radiation Detectors
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Solution Overview
Problem
In multi-electrode semiconductor radiation detectors, distinguishing between charge signals and induced signals is challenging, leading to inaccurate interaction position determination, especially at low energy thresholds, which affects the efficiency and accuracy of radiation detection.
Innovation Solution
A signal data processing method involving timing data calculation, delay, and selection is implemented to accurately determine charge signals by comparing data sequences with threshold values, allowing for precise identification of the channel that collected the electric charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a low energy threshold is set for radiation detection, then sensitivity to low-energy radiation is improved, but the ability to distinguish between charge signals and induced signals deteriorates
Solution Approach 1:
The patent segments the signal analysis process into multiple stages: initial threshold detection for sensitivity, followed by secondary verification using timing information and signal characteristics. This segmentation allows the system to maintain low energy thresholds while still reliably distinguishing charge signals from induced signals through multi-criteria evaluation.
Solution Approach 2:
The patent introduces timing data sequences and signal characteristic parameters as intermediary elements between the raw detection signal and the final signal classification. These intermediaries provide additional discrimination criteria that enable reliable signal identification even at low energy thresholds where direct amplitude-based distinction becomes difficult.
2Reliability
If signal processing is performed for all channels to ensure complete detection, then detection completeness is improved, but processing time and computational load increase
Solution Approach 1:
The patent performs preliminary filtering and timing-based pre-screening of detection signals before full processing. By evaluating timing data sequences and basic signal characteristics first, the system can quickly identify and process only those channels that contain genuine charge signals, avoiding unnecessary processing of induced signals while maintaining complete detection coverage.
Solution Approach 2:
The patent applies a two-level processing approach where a minimal initial processing step is applied to all channels for completeness, followed by full processing only for channels that pass the initial screening. This partial action approach ensures no genuine signals are missed while reducing overall processing time by avoiding excessive processing of non-genuine signals.
Data Source
AI summary
To make correct determination of electric charge collection among signals from a semiconductor radiation detector, provided in an embodiment of the present invention is a signal data processing method. The method includes a step of calculating timing data sequences unique to channels (timing data calculation step S02), each of channels corresponding to each of plural electrodes of the radiation detector, from detection signal data sequences. Then, while making a comparison with a first threshold value, a data value for the timing data sequence at timing when a predetermined delay time is elapsed after the timing data sequence reached the first predetermined value is selected as a timing data value for determination for the channel (delay and selection step S04). Finally, by comparing the timing data value for determinations for channels with a second threshold value, a detection signal data sequence greater than or equal to the second threshold value is determined to be a detection signal data sequence for a channel that actually collected the electric charge (determination step S06). In embodiments of the present invention a signal data processing device and radiation detection system are also provided.