Performance of P-type micro-strip detectors after irradiation to 7.5/spl times/10/sup 15/ p cm/sup 2/
Performance of P-type micro-strip detectors after irradiation to 7.5/spl times/10/sup 15/ p cm/sup 2/
复制标题
P型微带探测器辐照至7.5/spl times/10/sup 15/ p cm/sup 2/后的性能
DOI：
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发表时间：
2005
影响因子：
1.8
通讯作者：
J. Vossebeld
中科院分区：
文献类型：
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作者：
P. Allport;G. Casse;M. Lozano;P. Sutcliffe;J. Velthuis;J. Vossebeld
利用从n侧阅读出分段硅的优点，我们已经生产出具有LHC节距但具有1厘米长的条带的测试探测器，即使在CERN PS（24 GeV质子）以7.5/spl times/10/sup 15/ cm/sup-2/进行质子辐照后，使用LHC速度电子器件，该测试探测器也显示出大于8：1的信噪比。这一剂量超过了更换ATLAS半导体跟踪器所需的2倍，以科普LHC升级为具有10倍亮度的超级LHC。这些探测器在电阻率/spl sim/2 k/spl Omega/cm的p型起始材料上进行处理，并且与n-in-n设计不同，仅需要单面处理。因此，这种技术应该提供一种相对廉价的途径来取代超级LHC（SLHC）的ATLAS和CMS的中央跟踪。需要较短的带长度来限制噪声。即使在这些极端剂量下，也可以看到30%的未照射信号。这种7000 e/sup -/信号（在280-/spl μ/m厚的传感器中）与其他更奇特的探测器选项的辐射后性能非常具有竞争力。在SLHC处预期的命中密度将无论如何需要感测元件长度的按比例缩小（对于给定间距）以在中央跟踪器的层中保持小于1%的占用率。因此，我们提出这样一个“短带”的设计作为一个可能的低成本和易于实现的路线，以实现非常高的亮度跟踪的要求，在升级的LHC。
Exploiting the advantages of reading out segmented silicon from the n-side, we have produced test detectors with LHC pitch but 1-cm-long strips which even after proton irradiation at the CERN PS (24 GeV protons) to 7.5/spl times/10/sup 15/ cm/sup -2/ show signal to noise greater than 8:1 using LHC speed electronics. This dose exceeds by a factor of 2 that required for a replacement of the ATLAS semiconductor tracker to cope with an upgrade of the LHC to a Super-LHC with ten times greater luminosity. These detectors were processed on p-type starting material of resistivity /spl sim/2 k/spl Omega/cm and, unlike n-in-n designs, only required single-sided processing. Such technology should therefore provide a relatively inexpensive route to replacing the central tracking at both ATLAS and CMS for Super-LHC (SLHC). The shorter strip length is required to limit the noise. Even at these extreme doses 30% of the nonirradiated signal is seen. This 7000 e/sup -/ signal (in 280-/spl mu/m-thick sensors) is very competitive with the postirradiation performance of other, more exotic detector options . The hit density expected at a SLHC would anyway require a scaling down of the sense element length (for a given pitch) to retain an occupancy of less than 1% in the layers of the central tracker. We therefore propose such a "short-strip" design as a possible low cost and easily implemented route to achieving the requirements for very high luminosity tracking at an upgraded LHC.