SAMOP 2021 – scientific programme
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions (joint session A/Q)
A 2.13: Poster
Monday, September 20, 2021, 16:30–18:30, P
High-Precision Spectroscopy of Single Molecular Hydrogen Ions in a Penning Trap at Alphatrap — •Charlotte M. König, Fabian Heisse, Jonathan Morgner, Tim Sailer, Bingsheng Tu, Klaus Blaum, and Sven Sturm — Max-Planck-Institut für Kernphysik, 69117 Heidelberg
As the simplest molecules, molecular hydrogen ions (MHI) are an excellent system for testing QED. In collaboration with the group of Stephan Schiller (Heinrich-Heine-University Düsseldorf), we plan to perform high-precision spectroscopy on single MHI in the Penning-trap setup of Alphatrap [1]. The first measurements, in the microwave and MHz regime, will investigate the hyperfine structure of HD+. This will allow extracting the bound g-factors of the constituent particles and coefficients of the hyperfine hamiltonian, from which rovibrational laser spectroscopy performed on this ion species can benefit [2].
In the future, we aim to extend our methods to single ion rovibrational laser spectroscopy of H2+ at IR wavelengths enabling the ultra precise determination of fundamental constants, such as mp/me [3]. The development of the required techniques for this measurement will be an important step towards spectroscopy of an antimatter H2− ion for tests of matter-antimatter symmetry [4]. In this contribution, I will present an overview of the experimental setup and the measurement schemes.
[1] S. Sturm et al., Eur. Phys. J. Spec. Top. 227, 1425-1491 (2019)
[2] I. V. Kortunov, et al., Nature Physics 17, 569 573 (2021)
[3] J.-Ph. Karr, et al., Phys. Rev. A94, 050501(R) (2016)
[4] E. Myers, Phys. Rev. A98, 010101(R) (2018)