Atomic physics of simple atoms of matter and antimatter.

我的研究项目专注于简单原子的原子物理，主要是奇异原子，包括反物质粒子(正电子(E)、反质子(Pbar))。我在约克、麦克马斯特核反应堆(MNR)和欧洲核子研究中心(CERN)的三个主要研究目标都致力于电子系统的开发。已经产生了e与e-(Ps)或H离子(e H-)结合的正电子原子，并建议在约克继续测量，并扩展到我们在MNR的新用户设施。连续捕获反氢(Hbar)和Pbar测量建议在欧洲核子研究中心进行。 研究的目标是基础物理测试，包括QED和原子理论。Hbar和氢的对比将考验CPT，这是标准模型的基石。 我的研究在我们的领域受到高度期待，此外，我还为其他学科的其他研究(例如，MNR的固体物理、材料科学)做出了贡献。我的电子和原子物理工作每年都会邀请我在多个国际会议上发表演讲。 这些电子源是基于同位素的放射性贝塔衰变或与强伽马源的配对产生。对于正电子原子物理(e束缚于带负电荷的粒子，例如反质子(Pbar)，e-，H-…)，e被减慢，然后在圈闭中积累。这些原子的光谱学需要许多电子来制造足够的原子，以进行高精度的测量和系统效应测试。我们改进了现有的技术并开发了新的技术，成为世界领先者，实现了创纪录的e。我们计划在位于MNR的麦克马斯特强流正电子束设备(MIPBF)的新开发的用户设备上进行实验，这将进一步扩展我们的能力，获得更大的预期e率。我们已经开发了反应堆堆芯附近的e生产系统和束流引导，以将e发送给所有用户(例如，我们捕获e的装置和正电子原子的实验)。预计会超过e利率的100倍。 他说，除了这三个主要的研究计划外，建议的贡献还包括对其他四个实验的贡献：我合作精确测量氦精细结构间隔，并参与一个新的计划，以提高精度重新测量氢兰姆位移，后者旨在解决现有的质子电荷半径差异之谜。此外，在欧洲核子研究中心的Hbar陷阱，我们最近测量了反质子磁矩，大大提高了精度。欧洲核子研究中心提出的下一代实验将继续使用目前的Pbar束流时间。我们新仪器中的Hbar研究将受益于一种新的减速器(Elena)，它允许增加Pbar的捕获。最后，在拟议的研究中，我们沉积高纯度霓虹晶体(e慢化剂)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的电气等价物，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.