Kavli Affiliate: Yi Zhou
| First 5 Authors: Yue Meng, Xu Wang, Jianbei Liu, Ming Shao, Zhiyong Zhang
| Summary:
Working gas components significantly impact the performance of gaseous
detectors. A fast-timing Micromegas detector with two-stage amplification is
prone to notable deterioration of uniformity when scaled up. This paper
presents a simulation study based on Garfield++ that aims to enhance the
performance of such detectors by exploring different gas mixtures. The
properties of various gas compositions and their impact on detector performance
including gain uniformity and time resolution were investigated in the
simulation study. The gain uniformity and single-photon time resolution of the
detector were evaluated in tests using a multi-channel PICOSEC Micromegas (MM)
prototype with different gas mixtures. The experimental results are consistent
with the findings of the simulation. Both simulation and experimental results
indicate that a higher concentration of neon improves the detector’s gain
uniformity, while the impact of gas mixtures on time resolution should also be
considered as a critical performance indicator. The study presented in this
paper offers valuable insights for improving uniformity in large-area PICOSEC
MM detectors and optimizing overall performance.
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