Progress of the JILA electron EDM experiment

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https://hdl.handle.net/2142/91473

Author(s)

Zhou, Yan

Contributor(s)

Issue Date

2016-06-22

Keyword(s)

Spectroscopy in Traps

Abstract

A more accurate value for the permanent electric dipole moment of the electron (eEDM), whether consistent with zero or otherwise, will have important implications for extensions to the Standard Model. The JILA eEDM experiment uses trapped HfF$^{+}$ ions to attain a large effective electric field and a long measurement coherence time. We prepare HfF$^{+}$ ions in a low-lying, metastable $^{3}\Delta_{1}$ state and perform Ramsey spectroscopy with free-evolution times of $>$ 500 ms between two Zeeman sub-levels in the presence of rotating bias electric and magnetic fields. In this talk, we present initial results of an eEDM-sensitive 100-hour data run and a thorough investigation of various systematic errors. Several of our leading systematics have been suppressed to the 10$^{-30}$ e.cm level. In addition, we report two ongoing experiments aimed towards increasing the statistical sensitivity: (1) applying STImulated Raman Adiabatic Passage (STIRAP) for increased coherent population transfer to the eEDM-sensitive $^{3}\Delta_{1}$ state
and (2) implementing a new ion counting detector for increased detection efficiency and for suppressing shot-to-shot noise.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

Permalink

http://hdl.handle.net/2142/91473

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