The MoEDAL Experiment at the Large Hadron Collider

欧洲核子研究中心（CERN）大型强子对撞机（LHC）的MoEDAL实验于2015年开始采集数据，当时是LHC第2次运行的开始。MoEDAL是一个开创性的实验，旨在寻找新物理的高电离形象，如磁单极子、多重带电粒子或大质量（伪）稳定带电粒子。MoEDAL的物理程序定义了超过34个场景，这些场景可能会对基础问题产生潜在的革命性见解，包括：额外维度或新的对称性；磁荷;以及暗物质的本质。由阿尔伯塔大学（UofA）领导的MoEDAL合作项目由来自世界各地26个研究所的70名物理学家组成。该实验的发现潜力以一种互补的方式扩展了LHC的物理学视野。迄今为止，MoEDAL已经建立了世界上对多重磁荷单极子和高电荷粒子存在的最佳限制（准备中）。去年，MoEDAL向大型强子对撞机委员会（LHCC）提交了一份意向通知（NoI），要求在2020年开始的大型强子对撞机Run3期间额外提供30 lb -1的数据。MoEDAL的NoI收到了好评，引领了今年的全部请求。此外，MAPP （MoEDAL穿透粒子装置），一个新的MoEDAL子探测器，计划部署在Run3上，将扩展MoEDAL的物理范围，允许搜索毫荷粒子和新的非常长寿命的中性粒子。MoEDAL探测器具有双重性质。首先，它像一个巨大的照相机，由核轨迹探测器（NTDs）组成，通过超快速扫描光学显微镜进行离线分析。在不同的设施使用重离子来校准ntd。其次，它独特地能够捕获新物理学的粒子信使，以供进一步研究。第三个子探测器系统是TimePix像素设备阵列（TMPX），由约8个设备组成，分布在IP8的MoEDAL洞穴中。TMPX用于监测光束相关背景。MoEDAL NTD和MMT阵列是无源的，不需要读出电子设备或触发器。实时TimePix系统通过网络读取。虽然没有要求实验必须经常有人操作，但MoEDAL探测器的敏感元件需要每年更换一次。NTD探测器被送到博洛尼亚国际信息研究所和赫尔辛基大学进行分析。暴露的MMT捕获体积被发送到苏黎世联邦理工学院SQUID设备，以扫描捕获单极子的存在。

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.