Laser-cooled Berylllium ions for enhanced antihydrogen trapping and magnetometry

Be+离子可以被困在Penning陷阱中，并被激光冷却到非常低的温度。该项目旨在利用激光冷却离子作为反物质研究的工具，通过两种不同的方式：a)我们将使用激光冷却的Be+离子来共冷用于反氢合成的正电子，从而提高可以被捕获的可冷捕获的反氢的数量。我们将使用激光冷却提供的详细控制来探索更好地理解合成过程并改进它的方法。b)反氢测量已经达到了这样一个水平，对原位磁场的详细了解变得至关重要。激光冷却的Be+可以通过微波或拉曼跃迁激发，并用作原位磁强计。该学生将开发该方法，并将其与现有方法进行基准测试，并改进当前能力，以提高反氢的精度测量。

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.