51 citations · 145 across the 11 of their papers we have counts for
11 papers
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…
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…
Towards Rydberg quantum logic with trapped ions
P. Bachor, T. Feldker, J. Walz +1
We demonstrate the excitation of ions to the Rydberg state by vacuum ultraviolet radiation at a wavelength of combined with the coherent manipulation of the…
A continuous wave 10 W cryogenic fiber amplifier at 1015 nm and frequency quadrupling to 254 nm
R. Steinborn, A. Koglbauer, P. Bachor +4
A stable, continuous wave, single frequency fiber amplifier system at 1015 nm with 10W output power is presented. It is based on a large mode double clad fiber cooled to liquid nit…
Mode shaping in mixed ion crystals of 40Ca2+ and 40Ca+
T. Feldker, L. Pelzer, M. Stappel +5
We present studies of mixed Coulomb crystals of 40Ca+ and 40Ca2+ ions in a linear Paul trap. Doubly charged ions are produced by photoionisation of trapped 40Ca+ with a vacuum ultr…
High power, continuous-wave, single frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm
M. Stappel, R. Steinborn, D. Kolbe +1
We present a high power single-frequency ytterbium fiber amplifier system with an output power of 30 W at 1091 nm. The amplifier system consists of two stages, a preamplifier stage…
A reliable cw Lyman- laser source for future cooling of antihydrogen
D. Kolbe, A. Beczkowiak, T. Diehl +5
We demonstrate a reliable continuous-wave (cw) laser source at the 1\,--2\, transition in (anti)hydrogen at 121.56\,nm (Lyman-) based on four-wave sum-frequency mixing in…
Rydberg excitation of trapped cold ions: A detailed case study
F. Schmidt-Kaler, T. Feldker, D. Kolbe +5
We provide a detailed theoretical and conceptual study of a planned experiment to excite Rydberg states of ions trapped in a Paul trap. The ultimate goal is to exploit the strong s…
Continuous Lyman-alpha generation by four-wave mixing in mercury for laser-cooling of antihydrogen
D. Kolbe, A. Beczkowiak, T. Diehl +6
Cooling antihydrogen atoms is important for future experiments both to test the fundamental CPT symmetry by high-resolution laser spectroscopy and also to measure the gravitational…