The MAPP (MoEDAL Apparatus for Penetrating Particles) Upgrade for the MoEDAL-LHC Experiment at RUN-3

RUN-3 的 MoEDAL-LHC 实验的 MAPP（MoEDAL 粒子穿透装置）升级

• 批准号: SAPEQ-2020-00001
• 负责人: Pinfold, James
• 金额: $ 22.34万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Research Tools and Instruments
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=718756
• 关键词: MAPP; MoEDAL; Apparatus; Penetrating; Particles

The MoEDAL (Monopole and Exotics Detector at the LHC) is the 1st of a series of "dedicated experiments" planned for the LHC and designed to search for the highly ionizing avatars of new physics in a complementary way to the main LHC detectors, ATLAS and CMS. The MoEDAL experiment, led by the MoEDAL-Alberta group, is carried out by a collaboration of 70 physicists from around the world. It is partially supported by an NSERC Discovery grant. MoEDAL started to take data in 2015 and has since then has established the world's most stringent limits on multiply charged magnetic monopole production. MoEDAL was also the world's 1st experiment to put limits on the direct production of spin-1 monopoles and the first LHC experiment to place limits on monopole production via photon fusion as well as the Drell-Yan (DY) process. MoEDAL papers reporting the world's best direct limits on Dyons, highly charged monopoles, and, on multiply electrically charged particles, are in the process of being submitted. The largely passive MoEDAL detector, deployed at Point 8 on the LHC ring, has a dual nature. First, it acts like a giant camera, comprised of nuclear track detectors - analyzed offline by ultra fast scanning microscopes - sensitive only to new physics. Second, it is uniquely able to trap the particle messengers of physics beyond the Standard Model (SM) for further study. The radiation environment is monitored by a real-time TimePix pixel detector array. In order to push to higher energy (14 TeV) and luminosity (30 fb-1) the MoEDAL Collaboration will be taking data at LHC's RUN-3 (2021-2023). As part of this program the MoEDAL detector will be updated with the addition of a new subdetector called MAPP (MoEDAL Apparatus for Penetrating Particles). MAPP's purpose is to expand the physics reach of MoEDAL to include the search for: mini-charged particles (mCP) with charges as low as 0.001 the electron charge (e). and, weakly interacting very long-lived neutral particle messengers of new physics. Only the dedicated experiments, MOEDAL-MAPP and FASER, with complementary physics programs, will take data during LHC's upcoming RUN-3. The MoEDAL-Alberta group has the responsibility to design MAPP and also to construct the central MAPP mCP subdetector (MAPP-mCP). MAPP-mCP consists of two collinear sections with cross-sectional area 1.0 m2. Each section is comprised of 100 (10cm x 10cm) lengths comprised of 2 x 75 cm scintillator bars. Each bar is readout by a fast, low noise PMT that readout by specialized fast electronics, with a ToF resolution of 500 ps. Thus, each though-going particle will encounter 3m (4 bars) of scintillator, readout by 4 PMTs in coincidence. MAPP is protected from cosmic rays and SM particles from IP8, by: 100m rock overburden; at least 25 m of intervening rock; and, an active veto system. The MAPP mCP detector will greatly extend the ATLAS and CMS sensitivity to fractional charge which currently lies at only ~1/3e.

MOEDAL（LHC上的单极和外来探测器）是计划为LHC计划的一系列“专用实验”的第一，旨在以互补的方式搜索新物理学高度电离的化身，以通往主要LHC检测器，ATLAS和CMS。由Moedal-Alberta集团领导的Moedal实验是由来自世界各地的70名物理学家的合作进行的。它得到了NSERC Discovery Grant的部分支持。 Moedal于2015年开始获取数据，从那时起，就建立了世界上最严格的磁性单极生产限制。 Moedal也是世界第一实验，该实验是对Spin-1 Monopoles的直接产生和第一个通过光子融合以及Drell-Yan（DY）过程对单极产生限制的LHC实验的限制。在提交的过程中，报告了世界上最佳的直接限制，高电荷的单极以及在多重电荷粒子上的最佳直接限制。 在LHC环上的第8点部署的主要被动Moedal探测器具有双重性质。首先，它的作用像由核跟踪探测器组成的巨型摄像头 - 通过超快速扫描显微镜离线分析 - 仅对新物理学敏感。 其次，它具有独特的能力，可以将物理的粒子使者超越标准模型（SM）以进行进一步研究。辐射环境由实时时段像素检测器阵列监测。为了推动更高的能量（14 TEV）和发光度（30 FB-1），MOEDAL协作将在LHC的Run-3（2021-2023）上获取数据。作为该程序的一部分，将通过添加一个名为MAPP的新子测量器（用于穿透颗粒的MoEdal设备）来更新Moedal检测器。 MAPP的目的是扩大Moestal的物理范围，包括：搜索：电荷低至0.001电子电荷（E）的微型电荷颗粒（MCP）。 而且，弱相互作用的非常长的新物理中性粒子使者。 只有专门的实验，即Moedal-Mapp和Faser，具有互补的物理程序，才能在LHC即将到来的Run-3期间获取数据。 Moedal-Alberta集团有责任设计MAPP并构建中央MAPP MCP子探测器（MAPP-MCP）。 MAPP-MCP由两个共线切片组成，横截面面积为1.0 m2。每个截面由100（10厘米x 10厘米）的长度组成，由2 x 75 cm闪烁体杆组成。每个条均由一个快速，低噪声PMT读数，该PMT通过专门的快速电子设备读数，TOF分辨率为500 ps。因此，每个恒河的粒子都会遇到3M（4个bar）闪烁体，巧合的4个PMT读数。 MAPP免受IP8的宇宙射线和SM颗粒的保护，作者：100m岩石覆盖层； 至少25 m介入岩石；并且，一个主动的否决系统。 MAPP MCP检测器将大大扩展ATLAS和CMS敏感性对当前仅约1/3e的分数电荷。