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; 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).

此处要求的资金支持针对Atlas检测升级的R＆D努力，在CERN的大型强子对撞机（LHC），以确保将探测器的性能保持到所谓的高亮度LHC（HL-LHC），当时与亮度和碰撞速率相关时，该阶段的范围是7.5次，该阶段的范围是7.5次。 Future LHC计划被影响为欧洲粒子物理的首要任务，LHC和Atlas操作的未来是安全的。地图集探测器要求以HL-LHC预期的预期速率升级，并且在此升级程序中维持加拿大的参与包括大量的加拿大参与。HL-LHC的汇总将导致Atlas中的颗粒数量较大，并增加能源量的相应增加。 Atlas需要完全替换为带电颗粒的轨迹的内部检测器。新的探测器（称为ITK）将完全由硅检测器模块构建。这将是一项巨大的努力，需要大约一半的Atlas Institutes。液体Argon Calorimeter。在这里，加拿大对原始探测器的大部分贡献也需要一些Upgrades。读取电子设备将需要完全替换。同样，该设备位于最接近LHC质子梁的部分，在加拿大部分建造的正向热量计（FCAL）将无法在HL-LHC上正常运行；在投资下处理这一问题的许多选择。加拿大集团的提案参与了跟踪器升级（ITK）的构建，并为液体氩热量表读数电子设备的升级以及向前载量列表所采用的任何升级计划的升级。电子工作将自然而然地从该集团已经参与的I阶段升级工作中进行。由于直到2016年6月才能预期对FCAL升级的决定，因此此处要求的资金很少用于该部分工作；我们预计将在2016年提交的第二次RTI请求中包括在内。大部分请求是购买零件（硅传感器，ASIC，电子板），用于为ITK构建原型模块，以及用于构建和测试这些模块所需的设备。这是开发用于选择ITK模块构造站点的“站点验证”过程的必要步骤。加拿大集团计划建造该检测器“条形”部分所需的20000个模块中的1000个。对于现场资格，此处要求资金用于生产20个原型模块，该原型模块在拟议的两个加拿大地点（多伦多，温哥华）中的每个模块。