Preliminary Measurements for an Electron EDM Experiment in ThO

 Title: Preliminary Measurements for an Electron EDM Experiment in ThO Author: Gurevich, Yulia Citation: Gurevich, Yulia. 2012. Preliminary Measurements for an Electron EDM Experiment in ThO. Doctoral dissertation, Harvard University. Full Text & Related Files: Gurevich_gsas.harvard_0084L_10037.pdf (11.64Mb; PDF) Abstract: The ACME collaboration aims to measure the eEDM via Ramsey spectroscopy of a cryogenic beam of ThO molecules in their metastable H state. This thesis describes the launch of this new experimental effort. A set of diode lasers has been built to address all the necessary ThO transitions. The laser frequencies were stabilized to a stable reference laser via a $$Fabry-P\acute{e}rot$$ transfer cavity. A measurement of the magnetic dipole moment of the H state has been performed that is complementary to a previous measurement by the collaboration. This value is important for determining the sensitivity of the H state to magnetic fields, which can be a source of noise and systematic errors in the eEDM measurement. Experimental efforts to prepare the coherent superposition of the $$M = \pm1$$ Zeeman sublevels in the H,J = 1 state that is the starting point of the eEDM experiment using transitions to the G state resulted in a better understanding of transitions between $$\Omega$$-doublet states in an electric field. This led to a new technique for normalizing out shot-to-shot fluctuations in the molecular beam flux, which has also been demonstrated experimentally. Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10121983 Downloads of this work: