118 citations · 646 across the 13 of their papers we have counts for
13 papers
A Cryogenic Penning Trap Based on Permanent Magnets
F. Völksen, K. K. Anjum, R. P. Czampiel +30
We report on a Penning trap based on NdFeB permanent magnets operated at 4\,K with a magnetic field strength of 280\,mT. Reliable loading and confinement of protons, H ions,…
Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons
B. M. Latacz, M. Fleck, J. I. Jaeger +21
We demonstrate efficient sub-thermal cooling of the modified cyclotron mode of a single trapped antiproton and reach particle temperatures below mK in p…
A 16 Parts per Trillion Comparison of the Antiproton-to-Proton q/m Ratios
M. J. Borchert, J. A. Devlin, S. E. Erlewein +20
The Standard Model (SM) of particle physics is both incredibly successful and glaringly incomplete. Among the questions left open is the striking imbalance of matter and antimatter…
Penning-Trap Mass Measurement of Helium-4
Sangeetha Sasidharan, Olesia Bezrodnova, Sascha Rau +3
Light-Ion Trap (LIONTRAP), a high-precision Penning-trap mass spectrometer, was used to determine the atomic mass of He. Here, we report a 12 parts-per-trillion measurement o…
Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature
C. Will, M. Wiesinger, P. Micke +22
We demonstrate a new temperature record for image-current mediated sympathetic cooling of a single proton in a cryogenic Penning trap by laser-cooled Be. An axial mode temp…
Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap
Markus Wiesinger, Florian Stuhlmann, Matthew A. Bohman +21
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPM) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning…
High-precision measurement of the proton's atomic mass
Fabian Heiße, Florian Köhler-Langes, Sascha Rau +9
We report on the precise measurement of the atomic mass of a single proton with a purpose-built Penning-trap system. With a precision of 32 parts-per-trillion our result not only i…
BASE - The Baryon Antibaryon Symmetry Experiment
C. Smorra, K. Blaum, L. Bojtar +17
The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moment…
The electron mass from -factor measurements on hydrogen-like carbon C
Florian Köhler, Sven Sturm, Anke Kracke +3
The electron mass in atomic mass units has been determined with a relative uncertainty of , which represents a 13-fold improvement of the 2010 CODATA value. The…
g factor of lithiumlike silicon 28Si11+
Anke Wagner, Sven Sturm, Florian Köhler +7
The g factor of lithiumlike 28Si11+ has been measured in a triple-Penning trap with a relative uncertainty of 1.1x10^{-9} to be g_exp=2.0008898899(21). The theoretical prediction f…
Direct high-precision measurement of the magnetic moment of the proton
A. Mooser, S. Ulmer, K. Blaum +7
The spin-magnetic moment of the proton is a fundamental property of this particle. So far has only been measured indirectly, analysing the spectrum of an atomic hydroge…
Resolution of Single Spin-Flips of a Single Proton
A. Mooser, H. Kracke, K. Blaum +7
The spin magnetic moment of a single proton in a cryogenic Penning trap was coupled to the particle's axial motion with a superimposed magnetic bottle. Jumps in the oscillation fre…
Observation of Spin Flips with a Single Trapped Proton
S. Ulmer, C. C. Rodegheri, K. Blaum +4
Radio-frequency induced spin transitions of one individual proton are observed for the first time. The spin quantum jumps are detected via the continuous Stern-Gerlach effect, whic…