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arXiv 2005.13324physics.ins-dethep-ex
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使用CMS HGCAL进行精确计时量热

Precision timing calorimetry with the CMS HGCAL

Artur Lobanov

摘要:

现有的CMS端盖量热计将被高粒度量热计(HGCAL)取代,用于在高亮度(HL)LHC上运行。辐射硬度和优异的物理性能将通过利用硅垫传感器和SiPM上闪烁体瓷砖与高纵向和横向分割实现。HL-LHC的主要挑战之一将是高度堆积的环境,相互作用顶点不仅在位置上,而且在时间上分散。为了有效地拒绝源自堆积的颗粒,30 ps量级的精确定时信息将是非常有益的。为了达到这样的性能目标,HGCAL将为信号高于12 fC(相当于3-10 MIP)的单个命中提供定时测量,使得由$p_T$ > 5 GeV的粒子产生的团簇应具有优于30 ps的定时分辨率。考虑到系统的复杂性和尺寸,这对读出电子设备以及校准和重建过程提出了特别的挑战。我们提出了前端电子设计的挑战,在实验室和光束环境中的原型测试的结果,以及从模拟预期的定时性能。

英文摘要:

The existing CMS endcap calorimeters will be replaced with a High Granularity Calorimeter (HGCAL) for operation at the High Luminosity (HL) LHC. Radiation hardness and excellent physics performance will be achieved by utilising silicon pad sensors and SiPM-on-scintillator tiles with high longitudinal and transverse segmentation. One of the major challenges of the HL-LHC will be the high pileup environment, with interaction vertices spread not only in position, but also in time. In order to efficiently reject particles originating from pileup, precision timing information of the order of 30 ps will be of great benefit. In order to meet such performance goals, the HGCAL will provide timing measurements for individual hits with signals above 12 fC (equivalent to 3-10 MIPs), such that clusters resulting from particles with $p_T$ > 5 GeV should have a timing resolution better than 30 ps. Given the complexity and size of the system, this poses a particular challenge to the readout electronics as well as to the calibration and reconstruction procedures. We present the challenges for the front-end electronics design, results from prototype tests in laboratory and beam environments, as well as anticipated timing performance from simulation.

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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