A5056510694- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Refrigeration and Air Conditioning Technologies
- Phase Equilibria and Thermodynamics
- Advanced Frequency and Time Standards
- Heat Transfer and Boiling Studies
- Quantum optics and atomic interactions
- Heat Transfer and Optimization
- Additive Manufacturing and 3D Printing Technologies
- Quantum Information and Cryptography
- Wind and Air Flow Studies
- Thermal Analysis in Power Transmission
- Fluid Dynamics and Turbulent Flows
- Optical properties and cooling technologies in crystalline materials
- Electronic and Structural Properties of Oxides
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Chemical Thermodynamics and Molecular Structure
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Sensor Technologies Research
- Phase-change materials and chalcogenides
- Transition Metal Oxide Nanomaterials
Ferdinand-Braun-Institut
2023-2024
Kirchhoff (Germany)
2024
Leibniz University Hannover
2019-2024
Society for Chemical Engineering and Biotechnology
2023
University of Stuttgart
2023
Abstract Legal requirements for refrigerants necessitate a continuous development of these fluids, also focusing on mixtures. This article contributes three aspects to the ongoing research: (1) Experimental mean heat transfer coefficients were determined condensation two novel zeotropic mixtures, hexamethyldisiloxane (MM)/octamethyltrisiloxane and ethanol/MM, gathered filmwise vertical tube. (2) Both mixtures investigated with several compositions provide comprehensive understanding mixture...
Abstract Quantum technologies are advancing from fundamental research in specialized laboratories to practical applications the field, driving demand for robust, scalable, and reproducible system integration techniques. Ceramic components can be pivotal thanks high stiffness, low thermal expansion, excellent dimensional stability under stress. Lithography‐based additive manufacturing of technical ceramics is explored, especially miniaturized physics packages electro‐optical systems. This...
Abstract Eco‐friendly mixtures may substitute pure working fluids in thermodynamic cycle processes, yet the existing calculation approaches of mixture condensation are complex due to iterative procedures and multiple input data. To simplify condenser design, this project aims for a new method mixtures. On behalf, experimental data ethanol/water ethanol/octamethyltrisiloxane is provided within wide composition range identify most influential parameters. Finally, practical prediction heat...
Quantum technologies are advancing from fundamental research in specialized laboratories to practical applications the field, driving demand for robust, scalable, and reproducible system integration techniques. Ceramic components can be pivotal thanks high stiffness, low thermal expansion, excellent dimensional stability under stress. We explore lithography-based additive manufacturing of technical ceramics especially miniaturized physics packages electro-optical systems. This approach...
Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust compact, driving the need miniaturized highly stable optical setups system integration. In this work, we present a micro-integrated crossed-beam dipole trap setup, $\mu$XODT, designed trapping cooling $^{87}\text{Rb}$. This fiber-coupled setup operates at $1064\,\text{nm}$ wavelength with up to $2.5\,\text{W}$ power realizes free-space...
Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust compact, driving the need miniaturized highly stable optical setups system integration. In this work, we present a micro-integrated crossed-beam dipole trap setup, µXODT, designed trapping cooling 87 Rb. This fiber-coupled setup operates at 1064 nm wavelength with up to 2.5 W power realizes free-space crossed beam geometry. The µXODT...
Compact optical atomic clocks have become increasingly important in field applications and clock networks. Systems based on Ramsey-Borde interferometry (RBI) with a thermal beam seem promising to fill technology gap clocks, as they offer higher stability than vapour cell while being less complex cold clocks. Here, we demonstrate RBI strontium atoms, utilizing the narrow 1S0 -> 3P1 intercombination line at 689 nm, yielding 60 kHz broad spectral feature. The obtained Ramsey fringes for varying...
Due to its advantageous combination of individual properties, the utilization zeotropic mixtures as working fluids can improve overall efficiency in various thermodynamic cycle processes, such organic Rankine processes or Kalina processes. Therefore, properties density, viscosity, and surface tension are measured for ethanol, hexamethyldisiloxane (MM), octamethyltrisiloxane (MDM), their ethanol/MM ethanol/MDM at 100 kPa different temperatures (293–343 K) compositions. The fluid investigated...
Abstract The prediction of mixture condensation is still complex due to the coupled heat and mass transfer insufficient data thermophysical properties. This article analyzes impact various correlations on non-equilibrium approach for in a vertical plain tube. Furthermore, influence properties from different databases investigated. results are shown ethanol-water, but allow conclusions other fluid mixtures. They indicate that liquid coefficient dominates qualitative behavior process, vapor...
different reactor types are evaluated: fixed-bed, entrained flow reactors and in a hybrid entrained/fluidised bed reactor.Each type shows pros cons, which make them suitable for boundary conditions..............
Cold atomic quantum sensors rely on the generation, manipulation, and detection of gases are well proven within laboratory environments. For many applications in areas sensing, timekeeping fundamental physics, these setups need to be realized as mobile field compatible, miniaturized devices. However, this is still a major technological challenge.