Atomic physics of simple atoms of matter and antimatter.

我的研究计划侧重于简单原子的原子物理学，主要是奇异原子，包括反物质粒子（正电子（e+），反质子（Pbar））。为了我在约克、麦克马斯特核反应堆（MNR）和欧洲核子研究中心的三个主要研究目标，对e+系统进行了大量的开发。正电子原子与e+绑定到e-（Ps）或H-离子（e+H-）已经产生，并建议继续测量在约克与扩展在我们的新用户设施在MNR。欧洲核子研究中心提出了连续捕获反氢（Hbar）和Pbar测量。 研究旨在测试基础物理学，包括QED和原子理论。Hbar和氢的比较将测试CPT，标准模型的基石。 我的研究在我们的领域备受期待，此外，有助于（e+系统）在其他学科（如固态物理，材料科学在MNR）的其他研究。我的e+和原子物理学工作每年都会受邀参加多个国际会议。 e+源基于同位素的放射性β +衰变或与强伽马源的成对产生。对于正子原子物理学（e+与带负电荷的粒子结合，例如反质子（Pbar），e-，H-...），e+被减慢，然后在陷阱中积累。这些原子的光谱学需要许多e+来制造足够的原子，以进行高精度测量和系统效应测试。我们改进了现有技术并开发了新技术，成为世界领先者，实现了创纪录的e+数量和效率。实验在我们新开发的用户设施在麦克马斯特强正电子束设施（MIPBF）在MNR的建议，将进一步扩展我们的能力与更大的仍然预期的e+率。我们在反应堆堆芯附近开发了e+生产系统，并开发了将e+发送给所有用户（例如，我们捕获e+的装置和正子原子的实验）。超过100倍的e+率预计。 除了这3个主要的研究计划，提出的贡献也是其他4个实验：我合作在精确测量氦精细结构的间隔，并在一个新的计划，重新测量氢兰姆位移在提高精度与后者旨在解决现有的质子电荷半径差异难题。此外，在欧洲核子研究中心的Hbar捕获，我们最近测量了反质子磁矩，精度大大提高。欧洲核子研究中心提出的下一代实验继续使用目前的Pbar束时间。在我们的新设备中的Hbar研究将受益于一个新的减速器（ELENA），允许增加Pbar捕获。最后，在拟议的研究中，我们沉积高纯度氖晶体（e+减速剂）的经验导致了旨在形成一种新型材料的研究，这种材料相当于永久磁铁，永久驻极体。

My research program focuses on atomic physics of simple atoms, largely exotic atoms including antimatter particles (positron (e+), antiproton (Pbar)). Much development has been dedicated to e+ systems for my 3 major research objectives at York, at the McMaster nuclear reactor (MNR) and at CERN. Positronic atoms with e+ bound to e- (Ps) or to an H- ion (e+H-) have been produced and continued measurements are proposed at York with extention at our new user facility at MNR. Continued trapped Antihydrogen (Hbar) and Pbar measurements are proposed at CERN. Research is aimed at tests of fundamental physics including of QED and atomic theory. Comparisons of Hbar and hydrogen will test CPT, a corner stone of the Standard Model.      My research is highly anticipated in our field and in addition, contributes (e+ systems) to other research in other disciplines (eg solid state physics, materials science at MNR). My e+ and atomic physics work attract invitation to present at multiple international conferences annually.     e+ sources are based on radioactive beta+ decay of isotopes or pair production with intense gamma sources. For positronic atom physics (e+ bound to negatively charged particle, eg antiproton (Pbar), e-, H- …), e+ are slowed and then accumulated in a trap. Spectroscopy of these atoms requires many e+ to make sufficient atoms for high precision measurements and tests for systematic effects. We have improved on existing techniques and developed new ones, becoming a world leader, achieving record numbers and efficiencies for e+. Experiments at our newly developed user facility at the McMaster Intense Positron Beam Facility (MIPBF) at MNR are proposed that will further extend our capabilities with the much larger still expected e+ rates. We have developed the e+ production system near the reactor core and the beam guiding to send e+ to all users (eg. our apparatus for trapping e+ and experiments with positronic atoms). Over 100 times the e+ rate is expected.      In addition to these 3 major research programs, proposed contributions are also to 4 other experiments: I collaborate in precision measurements of helium fine-structure intervals and in a new program to re-measure the hydrogen Lamb shift at improved precision with the later aimed at solving the existing proton charge radius discrepancy puzzle. In addition the the Hbar trapping at CERN we have recently measured the antiproton magnetic moment at greatly improved precision. Next generation experiments proposed at CERN continue with the present Pbar beam time. Hbar research in our new apparatus will benefit from a new decelerator (ELENA) allowing increased Pbar trapping. Finally, in the proposed research, our experience depositing high purity neon crystals (e+ moderator) have led to research aimed at forming a new type of material, the electric equivalent of a permanent magnet, a permanent electret.