The MoEDAL Experiment at the Large hadron Collider

大型强子对撞机的 MoEDAL 实验

基本信息

批准号：
SAPPJ-2016-00028
负责人：
Pinfold, James
金额：
$ 2.29万
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：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=662226
关键词：
MoEDAL Experiment Large hadron Collider

项目摘要

In 2010 the MoEDAL experiment at the Large Hadron Collider (LHC) started data taking in June 2015. MoEDAL is a pioneering experiment designed to search for highly ionizing avatars of new physics such as magnetic monopoles or massive (pseudo-)stable charged particles. Its groundbreaking physics program defines over 34 scenarios that yield potentially revolutionary insights into such foundational questions as: are there extra dimensions or new symmetries; what is the mechanism for the generation of mass; does magnetic charge exist; what is the nature of dark matter; and, how did the big-bang develop. MoEDAL's purpose is to meet these challenges at the frontier of the field. The MoEDAL detector deployed at Point 8 (IP8) on the LHC ring late in 2014 utilizes an innovative and cost-effective combination of passive and active detection techniques. The MoEDAL experiment is led by the University of Alberta and now consists of 65 physicists from 25 institutes in 13 countries. MoEDAL physics program is designed to expand the physics horizons of the LHC in a complementary way.***The innovative and largely passive MoEDAL detector has a dual nature. First, it acts like a giant camera, comprised of Nuclear Track Detectors (NTDs) - analyzed offline by "smart" ultra fast Optical Scanning Microscopes (OSMs)- sensitive only to new physics. Second, it is uniquely able to trap the particle messengers of new physics for further study. The third and only active sub-detector system is the TimePix pixel device array (TMPX), consisting of ~8 devices distributed around the MoEDAL cavern at IP8. TMPX will be used to monitor highly ionizing beam related backgrounds. The MoEDAL experiment is completely different from other LHC experiments. The MoEDAL NTD and MMT arrays are passive requiring no readout electronics, HV, gas supply or trigger. The TMPX system is readout over the web. Thus, there is no requirement to constantly man the detector. However, the sensitive elements of the MoEDAL need to be replaced at least one a year, depending on beam backgrounds. The NTD detectors are etched and then analysed by a farm of “smart” ultrafast OSMs. The exposed MMT volumes are scanned at a SQUID facility for the presence of trapped magnetic charge and then moved to an underground facility to be monitored for the decay of very long lived electrically charged particles. MoEDAL NTDs are calibrated using a heavy-ion beam provided by the Brookhaven National Laboratory.***The first installation of the MoEDAL detector volumes was achieved in the winter of 2014-15. The exposed test NTD tracking and trapping volumes have been analysed with the first physics publications expected by December 2015. MoEDAL started to take data for the first time in June 2015 after the long LHC shutdown. The sensitive detector volumes will be replaced once or perhaps twice a year - depending on beam backgrounds at IP8 - for each of roughly 5 years of running required to obtain 10 fb-1. **

2010年，大型强子对撞机（LHC）的MOEDAL实验于2015年6月开始获取数据。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，例如磁单或大量（伪）稳定带电的颗粒。其开创性的物理计划定义了34个场景，这些方案可能会产生革命性的见解，以诸如：是否有额外的维度或新对称性；质量产生的机制是什么？是否存在磁性电荷；暗物质的本质是什么？而且，大爆炸是如何发展的。 Moedal的目的是在该领域的边界应对这些挑战。 2014年下半年在LHC环上部署的MOEDAL探测器采用了被动和主动检测技术的创新且具有成本效益的组合。 Moedal实验由艾伯塔大学（University of Alberta）领导，现在由来自13个国家的25个机构的65名物理学家组成。 Moedal物理计划旨在以完整的方式扩展LHC的物理视野。首先，它的作用像巨型摄像头，完成了核轨道探测器（NTDS） - 通过“智能”超快速光学扫描显微镜（OSMS）离线分析 - 仅对新物理学敏感。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。第三个也是唯一的主动子检测系统是TimePix像素设备阵列（TMPX），由〜8个设备组成，分布在IP8的Moedal Cavern周围。 TMPX将用于监视高度电离光束相关的背景。 MOEDAL实验与其他LHC实验完全不同。 Moedal NTD和MMT阵列是被动的，不需要读数电子，HV，气体供应或触发器。 TMPX系统通过网络读取。那就不需要不断探测探测器。但是，根据梁的背景，至少需要每年至少替换一个莫达尔的敏感元素。 NTD检测器被蚀刻，然后通过“智能”超快OSM的农场进行分析。将暴露的MMT体积扫描在鱿鱼设施中，以使其存在被困的磁性电荷，然后移动到基础设施中，以监测长期寿命的电动电动颗粒的衰减。使用Brookhaven国家实验室提供的重离子束对Moedal NTD进行校准。裸露的测试NTD跟踪和捕获量已通过预期到2015年12月的第一个物理出版物进行了分析。在长期LHC关闭后，Moedal于2015年6月首次开始获取数据。对于获得10 fb -1所需的大约5年的运行中的每一个，每年都将更换敏感的检测器量一次或可能每年两次。 **