Looking at the future path of high-energy physics, a muon collider offers incomparable potential for discovery in the multi-TeV energy range. However, its development must address some relevant technological challenges, which arise from the short muon lifetime, 2.2 μs, and from the difficulty of producing large numbers of muons in groups with small emittance. The first one in particular leads to the production of the so-called Beam-induced Background (BIB), which affects the design of the machine and detector. The purpose of this contribution is to describe the expected performance of the muon system of a multipurpose muon collider detector designed to reconstruct the products of multi-TeV collisions with extreme accuracy. We are proposing a design of the muon system fully based on Micropattern Gaseous Detectors (MPGD), which foresees the combination of tracking layers based on Triple-GEM detectors, with a timing layer based on a new generation MPGD called Picosec. Picosec was developed in the last few years by the RD51 collaboration, with the aim of obtaining a fast timing (sub ns) MPGD. A dedicated R&D is ongoing to optimize such a technology for the application in a muon collider experiment, both from the detector and the mechanics point of views. This contribution will present the results obtained during the R&D of the Picosec technology for the muon collider both from laboratory tests and test beams performed in 2023. Special attention will be given to the performance obtained with different gas mixtures. Moreover, we will discuss the plans for the R&D dedicated to the muon collider.

中文翻译：

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μ子对撞机实验μ子系统的快速定时探测器：仿真和原型性能的要求

展望高能物理的未来道路，μ子对撞机在多TeV能量范围内提供了无与伦比的发现潜力。然而，其发展必须解决一些相关的技术挑战，这些挑战是由于μ子寿命短（2.2μs）以及难以产生大量小发射度μ子团而产生的。第一个特别会导致所谓的束致背景（BIB）的产生，这会影响机器和探测器的设计。本贡献的目的是描述多功能 μ 子对撞机探测器的 μ 子系统的预期性能，该探测器旨在以极高的精度重建多 TeV 碰撞的产物。我们提出了一种完全基于微图案气体探测器 (MPGD) 的 μ 子系统设计，该系统预见了基于 Triple-GEM 探测器的跟踪层与基于称为 Picosec 的新一代 MPGD 的计时层的组合。 Picosec 是在过去几年中由 RD51 合作开发的，目的是获得快速定时（亚纳秒）MPGD。一项专门的研发工作正在进行中，从探测器和力学的角度来看，优化这种技术在μ子对撞机实验中的应用。本贡献将展示在 μ 子对撞机的皮秒技术研发过程中通过实验室测试和 2023 年进行的测试光束获得的结果。将特别关注使用不同气体混合物获得的性能。此外，我们还将讨论μ子对撞机的研发计划。