A High Compression Ratio Channel Multiplexing Method for Micro-pattern Gaseous Detectors
arxiv(2024)
摘要
Micro-pattern gas detectors (MPGD) find wide-ranging applications in particle
physics experiments, industry, and medical services, owing to their large area,
fine spatial resolution, and relatively low material content within the
sensitive region. However, the demand for a large number of readout channels
poses a bottleneck, limiting the application of MPGD to achieve higher accuracy
and more extensive area. This requirement also presents significant challenges
regarding system integration, power consumption, cooling, and cost.
Previous studies have shown that, under sparse effective hits, a channel
multiplexing method based on position encoded can address this issue.
Nonetheless, improving the compression ratio and addressing the high event
rate problem remain key challenges requiring further investigation.
In this research, we have developed two types of high compression ratio
multiplexing methods and their mathematical models. It is shown that a maximum
of n × (n-1)/2 - (n - 2)/2 + 1 detector channels can be read out with n
electronics channels if n is even. Using these methods, several multiplexing
boards were designed and implemented. Considering the real condition of the
detectors, we achieved an multiplexing board with 64 readout electronics
reading out 1024 detector channels, marking the highest compression ratio in
current research. Moreover, these multiplexing circuits were utilized and
verified in our cosmic-ray muon imaging facilities, demonstrating their
advantage of reducing the required number of front-end electronics cards.
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