58 citations · 252 across the 13 of their papers we have counts for
13 papers
Positron accumulation in the GBAR experiment
P. Blumer, M. Charlton, M. Chung +67
We present a description of the GBAR positron (e+) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discus…
Fluorescence calorimetry of an ion crystal
Marvin Gajewski, Wenbing Li, Sebastian Wolf +5
Motivated by the challenge of identifying intruder ions in a cold ion crystal, we investigate calorimetry from emitted fluorescence light. Under continuous Doppler cooling, the ion…
Collective photon emission patterns from two atoms in free space
Stefan Richter, Sebastian Wolf, Joachim von Zanthier +1
Modification of spontaneous decay in space and time is a central topic of quantum physics. It has been predominantly investigated in the context of cavity quantum electrodynamics (…
Robust Polarization Gradient Cooling of Trapped Ions
Wenbing Li, Sebastian Wolf, Lukas Klein +3
We implement three-dimensional polarization gradient cooling of trapped ions. Counter-propagating laser beams near nm impinge in linlin configuration, at a freque…
Optical super-resolution sensing of a trapped ion's wave packet size
Martin Drechsler, Sebastian Wolf, Christian T. Schmiegelow +1
We demonstrate super-resolution optical sensing of the size of the wave packet of a single trapped ion. Our method extends the well known ground state depletion (GSD) technique to…
Imaging trapped ion structures via fluorescence cross-correlation detection
Stefan Richter, Sebastian Wolf, Joachim von Zanthier +1
Cross-correlation signals are recorded from fluorescence photons scattered in free space off a trapped ion structure. The analysis of the signal allows for unambiguously revealing…
Positron production using a 9 MeV electron linac for the GBAR experiment
M. Charlton, J. J. Choi, M. Chung +67
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses…
Light from an ion crystal: bunching or antibunching?
Sebastian Wolf, Stefan Richter, Joachim von Zanthier +1
Photon statistics divides light sources into three different categories, characterized by bunched, antibunched or uncorrelated photon arrival times. Single atoms, ions, molecules,…
Efficient and robust photo-ionization loading of beryllium ions
Sebastian Wolf, Dominik Studer, Klaus Wendt +1
We demonstrate the efficient generation of Be ions with a 60 ns and 150 nJ laser pulse near 235 nm for two-step photo-ionization, proven by subsequent counting the number of io…
Microscopy with a Deterministic Single Ion Source
Georg Jacob, Karin Groot-Berning, Sebastian Wolf +6
We realize a single particle microscope by using deterministically extracted laser cooled Ca ions from a Paul trap as probe particles for transmission imaging. We demons…
Visibility of Young's interference fringes: Scattered light from small ion crystals
Sebastian Wolf, Julian Wechs, Joachim von Zanthier +1
We observe interference in the light scattered from trapped Ca ion crystals. By varying the intensity of the excitation laser, we study the influence of elastic and inel…
Single particle microscopy with nanometer resolution
Georg Jacob, Karin Groot-Berning, Sebastian Wolf +5
We experimentally demonstrate nanoscopic transmission microscopy relying on a deterministic single particle source. This increases the signal-to-noise ratio with respect to convent…
Cooling antihydrogen ions for the free-fall experiment GBAR
Laurent Hilico, Jean-Philippe Karr, Albane Douillet +3
We discuss an experimental approach allowing to prepare antihydrogen atoms for the GBAR experiment. We study the feasibility of all necessary experimental steps: The capture of inc…