Description:

Abstract: The AsymmetRic Trap for measurement of Electron Magnetic moments in IonS (ARTEMIS) utilizes the so-called laser-microwave double-resonance spectroscopy technique for measuring the magnetic moment of electrons bound in heavy, highly charged ions (HCIs). The extremely high field strength of the nearby nucleus in such HCIs enhances the effect of bound-state QED and nuclear interactions with the orbiting electron, making such measurements sensitive probes of these interactions. ARTEMIS has several design features that specifically enable this kind of measurement. The half-open Penning trap design allows for nearly 10 times more fluorescence light to be detected from the trap center compared to conventional open-ended Penning trap designs, and an indium-tin-oxide coated window allows transmission of the laser and microwave radiation while providing an electrode surface to apply the endcap potential to the trap. Recently the apparatus has been upgraded to allow injection of HCIs from the HITRAP deceleration facility at GSI as well as ultra-violet along the injection path. This is enabled by a novel fast-opening cryogenic valve that separates the cryogenic, extreme high vacuum trap region from the injection beamline with opening times below 100 ms.

Speaker: Jeffrey Klimes, GSI Helmholtz Center for Heavy Ion Research GmbH

Keywords: CFP, Physics