Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 35: Poster: Precision spectroscopy of atoms and ions (with Q)

A 35.7: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Towards Precision Spectroscopy of Argon XIV in the SpecTrap Penning Trap — •Tobias Murböck¹, Stefan Schmidt^2,3, Zoran Andelkovic⁴, Gerhard Birkl¹, Volker Hannen⁵, Kristian König², Alexander Martin¹, Wilfried Nörtershäuser², Manuel Vogel^1,4, Jonas Vollbrecht⁵, Danny Segal⁶, and Richard Thompson⁶ — ¹IAP, TU Darmstadt — ²IKP, TU Darmstadt — ³Institut für Kernchemie, Universität Mainz — ⁴GSI Darmstadt — ⁵IAP, Universität Münster — ⁶Department of Physics, Imperial College London

In few-electron ions, the strong electric and magnetic fields in the vicinity of the ionic nucleus significantly influence the remaining electronic system. By means of laser spectroscopy, the transition energies and lifetimes of fine structure and hyperfine structure transitions in highly charged ions (HCI) can be determined with an accuracy that reveals the contributions of bound-state QED in strong fields. We present the SpecTrap experiment located at the HITRAP facility at GSI and the associated low-energy beamline, which is currently being operated with an EBIS to produce mid-Z HCI such as Ar13+ and a second ion source for Mg+. Laser cooling on Mg+ ions to the mK regime and other functionalities of the trap have already been demonstrated. By use of resistive and sympathetic cooling with Mg+, the HCI can be cooled to cryogenic temperatures to prolong the storage time of the HCI and reduce Doppler broadening to some 10 MHz. Here, we discuss the scientific outline, the experimental apparatus and first results of the detection and manipulation of ions inside the Penning trap.