Gabrielse, GeraldMorrison, Tharon Daniel2023-06-0220232023-05-112023-05Morrison, Tharon Daniel. 2023. Towards antihydrogen spectroscopy and CW Lyman-alpha via four-wave mixing in mercury. Doctoral dissertation, Harvard University Graduate School of Arts and Sciences.30492274https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37375829During 2018, the ATRAP collaboration demonstrated the production of $5 \pm 2$ trapped antihydrogen per trial. Improved positron accumulation increased reliability and reduced loading times, making 1.5 million positrons available for antihydrogen production every 15 seconds. This led to a better understanding the positron plasma within the ATRAP nested Penning-Ioffe trap. More recent progress on a CW Lyman-alpha laser at 121 nm is presented. The goal of the laser is to produce 1 $\mu$W of continuous, coherent Lyman-alpha radiation by four-wave mixing in mercury. Simulations of a Zeeman slower with nested radial trap suggest that such a laser can slow hydrogen to increase atom flux at 40 m/s by a conservative factor of 5 to 10.application/pdfenantihydrogenATRAPfour-wave mixingmercurynonlinear opticspositronsAtomic physicsThesis or Dissertation2023-06-020009-0008-5616-4115