Laser-cooled Berylllium ions for enhanced antihydrogen trapping and magnetometry

Be+离子可以被捕获在Penning陷阱中，并被激光冷却到非常低的温度。这个项目旨在通过两种不同的方式将这种激光冷却的离子作为反物质研究的工具：a)我们将使用激光冷却的Be+离子来对称冷却用于反氢合成的正电子，从而增加可以捕获的冷捕获反氢的数量。我们将利用激光冷却提供的详细控制来探索更好地了解合成过程并改进它的方法。B)反氢测量已经达到了对现场磁场的详细了解变得至关重要的程度。激光冷却的Be+可以通过微波或拉曼跃迁激发，并用作现场磁强计。学生将开发这种方法，并将其作为现有方法的基准，并改进现有的能力，以提高反氢的精确测量。

Be+ ions can be trapped in Penning traps and laser-cooled to very low temperatures.This project aims to use such laser-cooled ions as a tool for antimatter research in two differentways : a) We will use laser-cooled Be+ ions to sympathetically cool positrons used for antihydrogen synthesis and thereby improve the number of cold trappable antihydrogen that can be trapped. We'll use the detailed control provided by laser-cooling to explore ways to better understand the synthesis process and improve it. b) Antihydrogen measurements have reached a level where detailed knowledge of the in-situ magnetic fields are becoming critical. Laser-cooled Be+ can be excited through either microwaves or Raman transitions and used as an in situ magnetometer. The student will develop this methodology and bench mark it to existing ones and improve on current capabilities for improved precision measurements on antihydrogen.