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arXiv 1604.07599physics.ins-dethep-ex
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在HL-LHC上用MDT室数据为ATLAS设计的高选择性一级μ子触发器

A Highly Selective First-Level Muon Trigger With MDT Chamber Data for ATLAS at HL-LHC

H. Kroha, S. Nowak

摘要:

高度选择性的触发器是必不可少的物理方案的ATLAS实验在HL-LHC的瞬时光度将是大约一个数量级大于LHC的瞬时光度运行1。由于电阻板和薄间隙触发室的中等动量分辨率,第一级μ子触发率由低于标称触发阈值的低动量μ子主导。使用精密μ子漂移管室的数据进行触发决策,可以充分降低HL-LHC的高触发率。这需要实现快速MDT读出链和具有至多6微秒的延迟的快速MDT轨道重构算法。快速读出链的硬件演示器已在CERN伽马辐照设施的HL-LHC操作条件下成功测试。在快速触发处理器上实现了快速航迹重建算法。

英文摘要:

Highly selective triggers are essential for the physics programme of the ATLAS experiment at HL-LHC where the instantaneous luminosity will be about an order of magnitude larger than the LHC instantaneous luminosity in Run 1. The first level muon trigger rate is dominated by low momentum muons below the nominal trigger threshold due to the moderate momentum resolution of the Resistive Plate and Thin Gap trigger chambers. The resulting high trigger rates at HL-LHC can be sufficiently reduced by using the data of the precision Muon Drift Tube chambers for the trigger decision. This requires the implementation of a fast MDT read-out chain and of a fast MDT track reconstruction algorithm with a latency of at most 6 microseconds. A hardware demonstrator of the fast read-out chain has been successfully tested at the HL-LHC operating conditions at the CERN Gamma Irradiation Facility. The fast track reconstruction algorithm has been implemented on a fast trigger processor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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