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arXiv 1408.6779physics.ins-dethep-ex
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ATLAS为未来几十年进行升级

ATLAS upgrades for the next decades

Walter Hopkins

摘要:

在2010-2012年LHC在质心能量为7和8 TeV的成功运行之后,计划正在积极推进一系列加速器的升级,从现在开始大约十年后的高亮度LHC(HL-LHC)项目中达到高潮,提供五倍于LHC标称瞬时亮度的亮度水平。最终目标是在2035年左右将ATLAS和CMS的数据集从大约几百fb $^{-1}$扩展到3000 fb $^{-1}$。与此同时,实验需要与加速器保持同步,以适应这十年超过标称光度的运行。ATLAS目前的规划设想在LHC合并期间对探测器进行重大升级,以达到LHC的全部能量并进一步升级。应对HL-LHC瞬时和积分亮度以及相关辐射水平的挑战需要对ATLAS探测器进行进一步的重大更改。这些设计正在迅速发展,用于新的全硅跟踪器,量热计和μ子系统的重大升级,以及改进的触发器和数据采集。这份报告总结了各种改进的ATLAS探测器需要应付预期的演变LHC光度在这十年和未来。

英文摘要:

After the successful LHC operation at the center-of-mass energies of 7 and 8 TeV in 2010-2012, plans are actively advancing for a series of upgrades of the accelerator, culminating roughly ten years from now in the high-luminosity LHC (HL-LHC) project, delivering of the order of five times the LHC nominal instantaneous luminosity along with luminosity leveling. The final goal is to extend the dataset from about few hundred fb$^{-1}$ to 3000 fb$^{-1}$ by around 2035 for ATLAS and CMS. In parallel, the experiments need to be kept lockstep with the accelerator to accommodate running beyond the nominal luminosity this decade. Current planning in ATLAS envisions significant upgrades to the detector during the consolidation of the LHC to reach full LHC energy and further upgrades. The challenge of coping with the HL-LHC instantaneous and integrated luminosity, along with the associated radiation levels, requires further major changes to the ATLAS detector. The designs are developing rapidly for a new all-silicon tracker, significant upgrades of the calorimeter and muon systems, as well as improved triggers and data acquisition. This report summarizes various improvements to the ATLAS detector required to cope with the anticipated evolution of the LHC luminosity during this decade and the next.

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