The MoEDAL Experiment at the Large Hadron Collider

大型强子对撞机的 MoEDAL 实验

• 批准号: SAPPJ-2019-00040
• 负责人: Pinfold, James
• 金额: $ 2.91万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=762551
• 关键词: MoEDAL; Experiment; Large; Hadron; Collider

The MoEDAL experiment at CERN's Large Hadron Collider (LHC) started data taking in 2015, at the start of LHC's Run2. MoEDAL is a pioneering experiment designed to search for highly ionizing avatars of new physics such as magnetic monopoles, multiply electrically charged particles, or massive (pseudo) stable charged particles. MoEDAL's physics program defines over 34 scenarios that may yield potentially revolutionary insights into foundational questions, involving: extra dimensions or new symmetries; magnetic charge; and, the nature of dark matter.  The MoEDAL Collaboration, led by the University of Alberta (UofA), consists of 70 physicists from 26 institutes around the world. The experiment's discovery potential expands the LHC's physics horizons, in a complementary way. To date, MoEDAL has established the world's best limits on the existence of multiply magnetically charged monopoles and highly electrically charged particles (in prep). Last year, MoEDAL presented a Notice of Intent (NoI) to the LHC Committee (LHCC), to request an additional 30 fb-1 of data during LHC's Run3, starting in 2020. MoEDAL's NoI was  well received, leading the way for the full request this year. In addition, MAPP (MoEDAL Apparatus for Penetrating Particles), a new MoEDAL sub-detector, planned for deployment for Run3,  will extend MoEDAL's physics reach allowing the search for milli-charged particles and new very long-lived neutral particles. The MoEDAL detector has a dual nature. First, it acts like a giant camera, comprised of Nuclear Track Detectors (NTDs) analyzed offline by ultra fast scanning optical microscope. The NTDs are calibrated using heavy-ion at various facilities. Second, it is uniquely able to trap the particle messengers of new physics for further study. The third sub-detector system is a TimePix pixel device array (TMPX), consisting of ~8 devices distributed throughout the MoEDAL cavern at IP8. TMPX is used to monitor beam related backgrounds. The MoEDAL NTD and MMT arrays are passive requiring no readout electronics or trigger. The real time TimePix system is readout over the web. Although  there are no requirements for the experiment to be constantly manned the sensitive elements of the MoEDAL detector need to be replaced once a year. The NTD detectors are sent for analysis at INFN Bologna and the University of Helsinki. The exposed MMT trapping volumes are sent to the ETH Zurich SQUID Facility to be scanned for the presence of trapped monopoles.

CERN大型强子对撞机（LHC）的MOEDAL实验在LHC Run2开始于2015年开始获取数据。 MoEdal是一个开创性的实验，旨在寻找新物理学的高度电离化身，例如磁性单极，乘电动电荷颗粒或巨大的（伪）稳定的带电颗粒。 Moedal的物理计划定义了34个场景，这些情况可能会产生对基本问题的潜在革命性见解，涉及：额外的维度或新的对称性；磁电荷；而且，暗物质的本质。由艾伯塔大学（UOFA）领导的Moedal合作由来自世界各地26家学院的70名物理学家组成。实验的发现潜力以一种完整的方式扩展了LHC的物理视野。迄今为止，Moedal已经建立了世界上最佳的限制，该限制是存在多重带电的单极和高电动电荷颗粒（以PREP）。去年，Moedal向LHC委员会（LHCC）提交了意向通知（NOI），要求在LHC的Run3期间要求另外30 fb-1的数据。此外，MAPP（用于穿透颗粒的MoEdal设备）是一种计划用于Run3的新型MoEdal子探测器，将扩展Moedal的物理范围，从而允许寻找Milli-Chareged颗粒和新的非常寿命的中性颗粒。莫达尔探测器具有双重性质。首先，它的作用像巨型相机，完成了通过超快速扫描光学显微镜离线分析的核轨道探测器（NTDS）。使用重型离子在各种设施中对NTD进行校准。其次，它具有独特的能力，可以将新物理学的粒子使者捕获以进行进一步研究。第三个子检测器系统是一个TimePix像素设备阵列（TMPX），由〜8个设备组成，该设备分布在IP8的MoEdal Cavern中。 TMPX用于监视梁相关的背景。 Moedal NTD和MMT阵列是被动的，不需要读数电子或触发。实时时间安排系统通过网络读取。尽管没有任何要求不断地掌管MoEdal探测器的敏感元素，但需要每年更换一次。 NTD探测器被发送在INFN Bologna和Helsinki大学进行分析。裸露的MMT捕获量被发送到苏黎世鱿鱼的Eth squid设施，以扫描存在捕获的单极。