Fundamental tests of antimatter gravitation with antihydrogen accelerators

用反氢加速器进行反物质引力的基础测试

• 批准号: 2587239
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2587239
• 关键词: Fundamental; tests; antimatter; gravitation; antihydrogen

One of the outstanding grand challenges in physics is to understand the fundamental differences between matter and antimatter that have left us with a universe that is largely composed of matter. The ALPHA (Antihydrogen Laser Physics Apparatus) experiment at CERN seeks to address this question by performing precise atomic physics measurements on trapped antihydrogen atoms in order to identify minute differences with equivalent measurements in hydrogen. The collaboration is building ALPHA-g, the next generation of antihydrogen traps intended to measure antimatter gravitation.The studentship aims to design and perform gravitational free-fall measurements on antihydrogen atoms in order to directly measure antimatter gravitational acceleration as a test of the weak equivalence principle. This is an interdisciplinary experimental project with underpinnings spanning plasma, atomic and particle physics. It is a studentship with the University of Manchester where the majority would be based at CERN in Geneva, Switzerland. The student will design and analyse experimental protocol and diagnostic technique for use in ALPHA-g intended to measure the gravitational acceleration g of antimatter on Earth. More specifically, the initial measurements conducted at the beginning of the studentship will need to gain higher precision throughout the course with a careful analysis and development of the ALPHA-g apparatus with associated commissioning and testing: in particular, the focus revolves around the magnet current control, trapping systems, cooling management and respective improvements.The successful realisation of this project will require both experimental efforts as well as development of diagnostic tools for measuring and controlling the probe and background magnetic fields in the experiment. Particle and field behaviour will be modelled using software such as GPT, Opera, ANSYS and COMSOL.The student will also be expected to participate in ALPHA's general experimental programme with trapped antihydrogen atoms while mastering the operation of the full experiment. The involvement will approach the student to ultra-high vacuum systems, beam and plasma manipulation techniques, diagnostic approaches, spectroscopy and laser techniques as well as their data analysis and tools. Ultimately, the student will contribute in the results of the full operation cycle of the ALPHA machine

物理学中最突出的重大挑战之一是理解物质和反物质之间的根本差异，这些差异给我们留下了一个主要由物质组成的宇宙。欧洲核子研究中心的反氢激光物理装置（英语：Antihydrogen Laser Physics Apparatus）实验试图通过对被捕获的反氢原子进行精确的原子物理测量来解决这个问题，以确定与氢的等效测量的微小差异。该项目旨在设计和执行反氢原子的重力自由落体测量，以直接测量反物质的重力加速度，作为弱等效原理的测试。这是一个跨学科的实验项目，其基础跨越等离子体，原子和粒子物理学。这是一个与曼彻斯特大学的学生，其中大多数将设在欧洲核子研究中心在日内瓦，瑞士。学生将设计和分析用于ALPHA-g的实验协议和诊断技术，旨在测量地球上反物质的重力加速度g。更具体地说，在学生开始时进行的初始测量将需要在整个过程中获得更高的精度，并仔细分析和开发ALPHA-g仪器，并进行相关的调试和测试：特别地，焦点围绕着磁体电流控制，捕获系统，冷却管理和各自的改进。该项目的成功实现将需要实验工作以及诊断工具的开发，在实验中控制探针和背景磁场。粒子和场的行为将使用GPT，Opera，ANSYS和COMSOL等软件进行建模。学生还将参与ALPHA的一般实验计划，并掌握完整实验的操作。参与将接近学生超高真空系统，光束和等离子体操纵技术，诊断方法，光谱学和激光技术以及它们的数据分析和工具。最终，学生将对ALPHA机器的整个操作周期的结果做出贡献