Upgrades to the ATLAS Detector at the Large Hadron Collider

大型强子对撞机 ATLAS 探测器的升级

• 批准号: SAPEQ-2016-00015
• 负责人: Krieger, Peter
• 金额: $ 16.03万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=616789
• 关键词: Upgrades; ATLAS; Detector; Large; Hadron

The funds requested here are in support of R&D efforts targeted at upgrades of the ATLAS detectorat the Large Hadron Collider (LHC) at CERN, to ensure that the performance of the detector is maintainedinto the so-called High Luminosity LHC (HL-LHC) phase, when the luminosity (related to the beam intensityand collision rate) will be up to 7.5 times that for which the LHC and ATLAS were originally designed.The future LHC program has been affirmed as the top priority of European particle physics, and the future ofLHC and ATLAS operations is secure. The ATLAS detector requires upgrades to operate at the increased rates expected at the HL-LHC, and maintaining Canadian involvement in ATLAS includes significant Canadianparticipation in this upgrade program.Collisions at the HL-LHC will result in a larger number of particles in ATLAS, with a corresponding increases in the amount of energy deposited. ATLAS was not designed for this environment, and some parts of it willneed to be upgraded. The Inner Detector, which tracks the trajectories of charged particles, will need to entirely replaced. The new detector, called the ITk, will be built entirely of silicon detector modules.This will be an enormous effort, requiring the involvement of about half of the ATLAS institutes.The Liquid Argon Calorimeter, where the bulk of the Canadian contributions to the original detector weremade, will also need some upgrades. The readout electronics will need to be entirely replaced. Also, the partof this device which sits closest to the LHC proton beams, the forward calorimeter (FCal), which was partiallybuilt in Canada, will not operate properly at the HL-LHC; a number of options for dealing with this problemare under investigation.The Canadian group proposes to be involved in the construction of the tracker upgrade (ITk) and to contribute to the upgrades of the Liquid Argon Calorimeter readout electronics and to whatever upgrade plan is adopted inthe region of the forward calorimeter. The electronics work would follow on naturally from Phase-I upgrade work that the group is already involved in. Because a decision on the FCal upgrade is not expected until June 2016, very little of the funds requested here are for that part of the work; we anticipate including this in a second RTI request to be submitted in 2016.The bulk of the request is for the purchase of parts (silicon sensors, ASICs, electronics boards) for theconstruction of prototype modules for the ITk, and for equipment necessary for the construction and testingof these modules. This is a necessary step in the “site-validation” process being developed for selectingthe ITk module construction sites. The Canadian group plans to build 1000 of the 20000 modules needed forthe “Strips” portion of this detector. For site qualification, funds are requested here for the productionof 20 prototype modules at each of two proposed Canadian sites (Toronto, Vancouver).

这里请求的资金用于支持旨在升级 CERN 大型强子对撞机 (LHC) 的 ATLAS 探测器的研发工作，以确保探测器的性能保持在所谓的高光度 LHC (HL-LHC) 阶段，届时光度（与光束强度和碰撞率有关）将达到LHC和ATLAS最初设计的7.5倍。未来的LHC计划已被肯定为顶级ATLAS 探测器需要升级才能以 HL-LHC 预期的更高速率运行，而保持加拿大对 ATLAS 的参与包括加拿大对这一升级计划的大力参与。 HL-LHC 的碰撞将导致 ATLAS 中产生大量粒子，沉积的能量也会相应增加，ATLAS 并不是为这种环境而设计的，并且它的某些部分需要进行调整。跟踪带电粒子轨迹的内部探测器将需要完全更换，称为 ITk，将完全由硅探测器模块构建。这将是一项巨大的工作，需要大约一半的人员参与。 ATLAS 研究所的一半。加拿大对原始探测器的大部分贡献是在液体氩热量计中完成的，读出电子设备也需要完全更换。此外，该设备中最接近的部分也需要进行一些升级。到部分在加拿大建造的大型强子对撞机质子束、前向热量计（FCal）将无法在 HL-大型强子对撞机上正常运行；正在研究解决这一问题的多种方案。加拿大小组提议参与该项目跟踪器升级（ITk）的建设，并为液体氩量热计读数电子设备的升级以及前量热计区域采用的任何升级计划做出贡献，电子工作将自然地从第一阶段开始进行。由于 FCal 升级的决定预计要到 2016 年 6 月才会做出，因此此处请求的资金很少用于该部分工作，我们预计将在第二次 RTI 请求中提供资金； 2016 年提交。大部分请求是购买用于构建 ITk 原型模块的零件（硅传感器、ASIC、电子板），以及构建和测试这些模块所需的设备。必要的步骤在为选择 ITk 模块建造地点而开发的“地点验证”流程中，加拿大集团计划建造该探测器“条带”部分所需的 1000 个模块。在拟议的加拿大两个地点（多伦多、温哥华）各生产 20 个原型模块。