2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87920This thesis describes the observation and study of Bose-Einstein condensation of a trapped, dilute gas of atomic hydrogen. The condensate and normal gas are studied by two-photon spectroscopy of the 1S-2S transition. We condense over 10^9 atoms per second for several seconds, and the peak condensate density is around 5x10^15 cm^-3. Topics covered in the thesis include a theoretical analysis of Bose-condensed hydrogen, a description of the cryogenic trapping cell and the evaporative cooling techniques used to bring the gas to the condensation point, and an analysis of the condensate.MIT PhD thesis; 173 pages, 63 figuresAtomic Physicstext