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arXiv 1603.09504physics.ins-dethep-ex
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大型强子对撞机高亮度升级用μ子漂移管探测器的研制

Development of Muon Drift-Tube Detectors for High-Luminosity Upgrades of the Large Hadron Collider

B. Bittner, J. Dubbert, O. Kortner, H. Kroha, F. Legger, R. Richter, O. Biebel, A. Engl, R. Hertenberger, F. Rauscher

摘要:

大型强子对撞机(LHC)实验中的μ子探测器必须应对前所未有的高中子和伽马射线背景率。例如,在ATLAS探测器的μ子光谱仪的前向区域,在LHC设计光度下达到了1.7 kHz/cm 2的计数率。对于LHC的高亮度升级,预计高达10倍的背景速率,这需要更换关键探测器区域的μ子室。在欧洲核子研究中心伽马辐照设施进行的测试表明,带有15毫米直径铝管的漂移管探测器在3巴的Ar:CO2(93:7)气体下工作,最大漂移时间约为200纳秒,可提供有效和高分辨率的μ子跟踪,达到最高预期速率。对于15 mm的管直径,空间电荷效应恶化的空间分辨率在高速率强烈抑制。传感线必须以优于50 μ m的精度定位在腔室内。micons,以实现所需的空间分辨率的50室?微米到最高速率。我们报告的原型探测器,满足这些要求的设计,施工和测试。

英文摘要:

The muon detectors of the experiments at the Large Hadron Collider (LHC) have to cope with unprecedentedly high neutron and gamma ray background rates. In the forward regions of the muon spectrometer of the ATLAS detector, for instance, counting rates of 1.7 kHz/square cm are reached at the LHC design luminosity. For high-luminosity upgrades of the LHC, up to 10 times higher background rates are expected which require replacement of the muon chambers in the critical detector regions. Tests at the CERN Gamma Irradiation Facility showed that drift-tube detectors with 15 mm diameter aluminum tubes operated with Ar:CO2 (93:7) gas at 3 bar and a maximum drift time of about 200 ns provide efficient and high-resolution muon tracking up to the highest expected rates. For 15 mm tube diameter, space charge effects deteriorating the spatial resolution at high rates are strongly suppressed. The sense wires have to be positioned in the chamber with an accuracy of better than 50 ?micons in order to achieve the desired spatial resolution of a chamber of 50 ?microns up to the highest rates. We report about the design, construction and test of prototype detectors which fulfill these requirements.

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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