A5087785573- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Noncommutative and Quantum Gravity Theories
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Superconducting and THz Device Technology
- Radioactive Decay and Measurement Techniques
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Computational Physics and Python Applications
- Quantum Mechanics and Applications
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Physics of Superconductivity and Magnetism
- Nuclear Physics and Applications
Heinrich Heine University Düsseldorf
2024-2025
Johannes Gutenberg University Mainz
2022-2024
<title>Abstract</title> Coherent quantum transition spectroscopy is a powerful tool in quantum-sensing and metrology (1), information processing (2), accurate magnetometry (3), high-precision tests of the fundamental laws nature, searches for physics beyond Standard Model (4). In atomic measurements, it was applied with great success proton deuteron magnetic moment measurements (5), which culminated example MASER sub-parts per trillion resolution (6), record-constraints on neutron electric...
Cooling of particles to mK-temperatures is essential for a variety experiments with trapped charged particles. However, many species interest lack suitable electronic transitions direct laser cooling. We study theoretically the remote sympathetic cooling single proton laser-cooled $^9$Be$^+$ in double-Penning-trap system. investigate three different schemes and find, based on analytical calculations numerical simulations, that two them are capable achieving temperatures about 10 mK times...
We demonstrate a new temperature record for image-current mediated sympathetic cooling of single proton in cryogenic Penning trap by laser-cooled ^{9}Be^{+}. An axial mode 170 mK is reached, which 15-fold improvement compared to the previous best value. Our technique applicable any charged particle, so that measurements presented here constitute milestone toward next generation high-precision Penning-trap with exotic particles.
We demonstrate efficient subthermal cooling of the modified cyclotron mode a single trapped antiproton and reach particle temperatures T_{+}=E_{+}/k_{B} below 200 mK in preparation times shorter than 500 s. This corresponds to fastest resistive single-particle ever demonstrated. By particles such low energies, we detection spin transitions with an error rate <0.000 023, more 3 orders magnitude better previous best experiments. method has enormous impact on multi-Penning-trap experiments that...
We present the design and characterization of a cryogenic window based on an ultra-thin aluminized biaxially oriented polyethylene terephthalate foil at T < 10 K, which can withstand pressure difference larger than 1 bar leak rate <1×10-9 mbar l/s. Its thickness ∼1.7 μm makes it transparent to various types particles over broad energy range. To optimize transfer 100 keV antiprotons through window, we tested degrading properties different aluminum coated polymer foils thicknesses between 900...
Currently, the world's only source of low-energy antiprotons is AD/ELENA facility located at CERN. To date, all precision measurements on single have been conducted this and provide stringent tests fundamental interactions their symmetries. However, magnetic field fluctuations from operation limit upcoming measurements. overcome limitation, we designed transportable antiproton trap system BASE-STEP to relocate laboratories with a calm environment. We anticipate that will facilitate enhanced...
The Standard Model (SM) of particle physics is both incredibly successful and glaringly incomplete. Among the questions left open striking imbalance matter antimatter in observable universe which inspires experiments to compare fundamental properties matter/antimatter conjugates with high precision. Our deal direct investigations protons antiprotons, performing spectroscopy advanced cryogenic Penning-trap systems. For instance, we compared proton/antiproton magnetic moments 1.5 ppb...
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPMs) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection in hermetically sealed Penning-trap chamber with limited optical access, where state-of-the-art using telescope room temperature would be extremely difficult. characterize the properties of SiPM cryocooler K, we measure dark count rate below 1 s-1...
<title>Abstract</title> The antiproton is a basic constituent of antimatter and required for stringent matter-antimatter comparisons to test the fundamental charge-parity-time (CPT) reversal invariance in Standard Model particle physics (1). Using low energy antiprotons, only available at factory (AMF) located CERN (2), such tests have been realized example high-precision spectroscopy antiprotonic atoms (3), antihydrogen (4). In our cryogenic Penning-trap experiments (5), we measure...
Abstract The BASE collaboration at the antiproton decelerator/ELENA facility of CERN compares fundamental properties protons and antiprotons with ultra-high precision. Using advanced Penning trap systems, we have measured proton magnetic moments fractional uncertainties 300 parts in a trillion (p.p.t.) 1.5 billion (p.p.b.), respectively. combined measurements improve resolution previous best test that sector by more than factor 3000. Very recently, compared antiproton/proton charge-to-mass...
We demonstrate a new temperature record for image-current mediated sympathetic cooling of single proton in cryogenic Penning trap by laser-cooled $^9$Be$^+$. An axial mode 170 mK is reached, which 15-fold improvement compared to the previous best value. Our technique applicable any charged particle, so that measurements presented here constitute milestone towards next generation high-precision Penning-trap with exotic particles.
We describe a newly developed polytetrafluoroethylene/copper capacitor driven by cryogenic piezoelectric slip-stick stage and demonstrate with the chosen layout capacitance tuning of ≈60 pF at ≈10 background capacitance. Connected to highly sensitive superconducting toroidal LC circuit, we resonant frequency between 345 685 kHz, quality factors Q > 100 000. ultra low noise amplifier, range 520 710 kHz is reached, while 86 000 are achieved. This new device can be used as versatile image...
Currently, the only worldwide source of low-energy antiprotons is AD/ELENA facility located at CERN. To date, all precision measurements on single have been conducted this and provide stringent tests fundamental interactions their symmetries. However, magnetic field fluctuations from operation limit upcoming measurements. overcome limitation, we designed transportable antiproton trap system BASE-STEP to relocate laboratories with a calm environment. We anticipate that will facilitate...
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-trap system. Our approach enables fluorescence detection in hermetically-sealed Penning-trap chamber with limited optical access, where state-of-the-art using telescope room temperature would be extremely difficult. characterize the properties of SiPM cryocooler K, we measure dark count rate below 1/s efficiency...