A5032432540- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Precipitation Measurement and Analysis
- Particle physics theoretical and experimental studies
- Orbital Angular Momentum in Optics
- Experimental and Theoretical Physics Studies
- Fluid Dynamics and Heat Transfer
- Blind Source Separation Techniques
- Spectroscopy and Laser Applications
- Cold Atom Physics and Bose-Einstein Condensates
Universität Hamburg
2021-2025
Max Planck Institute for Physics
2020
We report the first result from a dark photon matter search in mass range 78.62 to <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>83.95</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">μ</a:mi><a:mi>eV</a:mi><a:mo>/</a:mo><a:msup><a:mi>c</a:mi><a:mn>2</a:mn></a:msup></a:mrow></a:math> with dielectric haloscope prototype for (Magnetized Disc and Mirror Axion eXperiment). Putative photons would convert detectable within stack...
Axions and axion-like particles are excellent low-mass dark matter candidates. The MADMAX experiment aims to directly detect galactic axions with masses between $40\,\mu{\rm eV}$ $400\,\mu{\rm by using the axion-induced emission of electromagnetic waves from boundaries materials different dielectric constants under a strong magnetic field. Combining many such surfaces, this can be significantly enhanced (boosted) constructive interference resonances. We present first proof principle...
Abstract Axion haloscopes search for dark matter axions from the galactic halo, most commonly by measuring a power excess sourced axion effective current density. Constraining parameters detection or lack thereof requires estimating expected signal power. Often, this is done studying response of haloscope to known, but different, source density, example via reflection measurement. However, only in special case when both sources induce same electromagnetic fields, do quantities derived...
We present 3D calculations for dielectric haloscopes such as the currently envisioned MADMAX experiment. For ideal systems with perfectly flat, parallel and isotropic disks of finite diameter, we find that a geometrical form factor reduces emitted power by up to $30\,\%$ compared earlier 1D calculations. derive beam shape, which is important antenna design. show realistic dark matter axion velocities $10^{-3} c$ inhomogeneities external magnetic field at scale $10\,\%$ have negligible impact...
Abstract The reciprocity approach is a powerful method to determine the expected signal power of axion haloscopes in model-independent way. Especially for open and broadband setups like MADMAX dielectric haloscope sensitivity field difficult calibrate since they do not allow discrete eigenmode analysis are optically too large fully simulate. central idea measure reflection-induced test setup instead trying simulate axion-induced field. In this article, used dish antenna minimal directly from...
MADMAX, a future experiment to search for axion dark matter, is based on novel detection concept called the dielectric haloscope. It consists of booster composed several disks positioned with $\mu$m precision. A prototype one movable disk was built demonstrate mechanical feasibility such in challenging environment experiment: high magnetic field convert axions into photons and cryogenic temperature reduce thermal noise. tested both inside strong up 1.6 T at temperatures down 35K. The...
Abstract MADMAX, a future experiment to search for axion dark matter, is based on novel detection concept called the dielectric haloscope. It consists of booster composed several disks positioned with μm precision. A prototype one movable disk was built demonstrate mechanical feasibility such in challenging environment experiment: high magnetic field convert axions into photons and cryogenic temperature reduce thermal noise. tested both inside strong up 1.6 T at temperatures down 35 K. The...
High-amplitude localized waves in a narrow channel can juggle large-sized droplets for tens of thousands cycles without coalescing. The wave launches and softly catches the drop at every cycle, laterally traps it. This system be considered gravity-wave analog optical tweezers.
The reciprocity approach is a powerful method to determine the expected signal power of axion haloscopes in model-independent way. Especially for open and broadband setups like MADMAX dielectric haloscope sensitivity field difficult calibrate since they do not allow discrete eigenmode analysis are optically too large fully simulate. central idea measure reflection-induced test setup instead trying simulate axion-induced field. In this article, used dish antenna minimal directly from...