Electrical characterization of surface properties of the ATLAS17LS sensors after neutron, proton and gamma irradiation
Electrical characterization of surface properties of the ATLAS17LS sensors after neutron, proton and gamma irradiation
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中子、质子和伽马辐照后 ATLAS17LS 传感器表面特性的电学表征
DOI：
10.1016/j.nima.2020.164456
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Mikestikova M
中科院分区：
文献类型：
--
作者：
Mikestikova M
大型强子对撞机的高亮度升级，预计在2027年，需要用新的全硅内部跟踪器（ITk）替换ATLAS内部探测器。预计总积分光度为4000 fb−1，这意味着ITk探测器的条带部分将暴露在高达Φ e q= 1.6× 10 15 1 MeV n e q/cm的大辐射影响下，电离剂量为0.66 MGy，其中安全系数为1.5。用于ITk的耐辐射n+ in-p微带传感器是由ATLAS ITk条形传感器合作开发的，由Hamamatsu Photonics KK公司生产。本文展示了最新的管状ATLAS17LS传感器原型在辐照前后的电特性。在质子、中子和伽马辐照达到ITk条形跟踪器规定的最大影响和辐射剂量之前和之后，研究了长条形桶、全尺寸和微型传感器的表面特性。传感器已被CYRIC、东北大学（日本）、欧洲核子研究中心的质子辐照设施、卡尔斯鲁厄理工学院（德国）和伯明翰大学（英国）的质子辐照、卢布尔雅那TRIGA反应堆（斯洛文尼亚）的中子和UJP Praha（捷克共和国）60 Co源的伽马射线辐照。经验证，表面辐射损伤不影响传感器的功能。击穿电压远高于最大工作电压。所有被测表面参数，如条带间电阻和电容、耦合电容和偏置电阻，均满足ATLAS ITk对条带传感器的要求。
The high luminosity upgrade of the Large Hadron Collider, foreseen for 2027, requires the replacement of the ATLAS Inner Detector with a new all-silicon Inner Tracker (ITk). The expected total integrated luminosity of 4000 fb− 1 means that the strip part of the ITk detector will be exposed to a large radiation fluence of up to Φ e q= 1.6× 10 15 1 MeV n e q/cm and an ionizing dose of 0.66 MGy, including a safety factor of 1.5. Radiation-hard n+-in-p micro-strip sensors for use in the ITk have been developed by the ATLAS ITk Strip Sensor collaboration and produced by Hamamatsu Photonics KK In this paper, the results obtained from the electrical characterization of the latest barrel ATLAS17LS sensor prototype, before and after irradiation, are shown. Surface properties of the long-strip barrel, full-sized and miniature sensors have been studied before and after proton, neutron and gamma irradiation up to the maximal fluences and radiation doses specified for the ITk Strip tracker. Sensors have been irradiated by protons at CYRIC, Tohoku University (Japan), the Proton Irradiation Facility at CERN, Karlsruhe Inst. Tech.(Germany) and at the University of Birmingham (UK), by neutrons from the Ljubljana TRIGA reactor (Slovenia) and by gamma rays from the 60 Co source in UJP Praha (Czech Republic). It has been verified that the surface radiation damage does not influence the sensor functionality. The breakdown voltage is well above the maximum operational voltage. All the tested surface parameters, such as the inter-strip resistance and capacitance, coupling capacitance and bias resistance satisfy the ATLAS ITk specifications for strip sensors.
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