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Article
Open AccessOptimal Operation of Cryogenic Calorimeters Through Deep Reinforcement Learning
Cryogenic phonon detectors with transition-edge sensors achieve the best sensitivity to sub-GeV/c \(^2\) ...
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Article
Open AccessDetector Development for the CRESST Experiment
Recently low-mass dark matter direct searches have been hindered by a low-energy background, drastically reducing the physics reach of the experiments. In the CRESST-III experiment, this signal is characterise...
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Article
Open AccessLight dark matter search using a diamond cryogenic detector
Diamond operated as a cryogenic calorimeter is an excellent target for direct detection of low-mass dark matter candidates. Following the realization of the first low-threshold cryogenic detector that uses dia...
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Article
Open AccessTowards an automated data cleaning with deep learning in CRESST
The CRESST experiment employs cryogenic calorimeters for the sensitive measurement of nuclear recoils induced by dark matter particles. The recorded signals need to undergo a careful cleaning process to avoid ...
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Article
Open AccessCrack initiation and propagation analysis for fisheye failures in high-strength gears
Lightweight design has had an important role to play in recent gear developments. One way of reducing gear weight is to apply a shot-peening process in addition to the usual case-hardening because the higher c...
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Article
Open AccessOperation of an Archaeological Lead PbWO \(_4\) Crystal to Search for Neutrinos from Astrophysical Sources with a Transition Edge Sensor
The experimental detection of the CE \(\nu\) ν NS allows the investigation of...
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Article
Open AccessImproving the Quality of CaWO4 Target Crystals for CRESST
The Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO ...
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Article
Open AccessChallenges in determination of microscopic degree of cleanliness in ultra-clean gear steels
Shot-peened, case-hardened gears can fail in the tooth root due to crack initiation below the surface of the steel matrix. Here, the crack is initiated at a non-metallic inclusion in the center of a so-called ...
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Article
Open AccessA low-threshold diamond cryogenic detector for sub-GeV dark matter searches
In this work we report the realization of the first low-threshold cryogenic detector that uses diamond as absorber for astroparticle physics applications. We tested two 0.175 g CVD diamond samples, each instru...
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Article
Open AccessProbing spin-dependent dark matter interactions with \(^6\) Li
CRESST is one of the most prominent direct detection experiments for dark matter particles with sub-GeV/c \(^2\) ...
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Article
Open AccessOn the determination of the bending fatigue strength in and above the very high cycle fatigue regime of shot-peened gears
Demands on modern gearboxes are constantly increasing, for example to comply with lightweight design goals or new CO2 thresholds. Normally, to increase performance requires making gearboxes and powertrains more r...
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Article
Open AccessFracture analysis of fisheye failures in the tooth root fillet of high-strength gears made out of ultra-clean gear steels
In shot-peened components, failures can be caused by a crack initiation below the surface at a non-metallic inclusion in the steel matrix. This fracture mechanism is called “fisheye failure”. In addition, this...
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Article
Open AccessCryogenic characterization of a \(\hbox {LiAlO}_{2}\) crystal and new results on spin-dependent dark matter interactions with ordinary matter
In this work, a first cryogenic characterization of a scintillating \(\hbox {LiAlO}_{2}\) ...
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Article
Open AccessStrange semimetal dynamics in SrIrO3
The interplay of electronic correlations, multi-orbital excitations, and spin-orbit coupling is a fertile ground for new states of matter in quantum materials. Here, we report on a polarized Raman scattering s...
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Article
Open AccessNew limits on the resonant absorption of solar axions obtained with a \(^\mathbf {169}\)Tm-containing cryogenic detector
A search for resonant absorption of solar axions by \(^{169}\mathrm {Tm}\)169Tm nuclei was carried out. A newly developed approach involving low-background cryogenic bolometer based on $$\mathrm {Tm}_{3} \mathrm ...
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Article
Open AccessOperation of a Diamond Cryogenic Detector for Low-Mass Dark Matter Searches
Despite the multiple and convincing evidence of the existence of dark matter (DM) in our Universe, its detection is one of the most pressing questions in particle physics. As of today, there is no unambiguous ...
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Article
Open AccessLithium-Containing Crystals for Light Dark Matter Search Experiments
In the current direct dark matter search landscape, the leading experiments in the sub-GeV mass region mostly rely on cryogenic techniques which employ crystalline targets. One attractive type of crystals for ...
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Article
Open AccessDeposition of Tungsten Thin Films by Magnetron Sputtering for Large-Scale Production of Tungsten-Based Transition-Edge Sensors
To cope with the foreseen demand for tungsten-based TESs in the current and future phases of the CRESST experiment, we investigated the possibility to implement a reliable, simple and reproducible fabrication ...
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Article
Open AccessPterosaurs ate soft-bodied cephalopods (Coleoidea)
Direct evidence of successful or failed predation is rare in the fossil record but essential for reconstructing extinct food webs. Here, we report the first evidence of a failed predation attempt by a pterosau...
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Article
Effect of Hydrostatic Pressure on Superconductivity of FeSe Thin Films
The electronic transport in superconducting epitaxial c-axis-oriented FeSe thin films grown on (001)-oriented MgO substrates was investigated. To this end, the in-plane resistivity was measured in dependence on t...
