Results 51 to 60 of about 8,346 (279)

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Analysis of Narrow-Line Laser Cooling and Trapping of Sr Atoms in Microgravity Environments

Applied Sciences, 2020
Obtaining ultracold alkaline earth(-like) atoms in space encounters the problem of performing narrow-line laser cooling in microgravity environments ( μ -gEs).
Jie Ren, Hui Liu, Xiaotong Lu, Hong Chang   +3 more
doaj   +1 more source

An accurate optical lattice clock with 87Sr atoms [PDF]

, 2006
We report a frequency measurement of the 1S0-3P0 transition of 87Sr atoms in an optical lattice clock. The frequency is determined to be 429 228 004 229 879 (5) Hz with a fractional uncertainty that is comparable to state-of-the-art optical clocks with ...
Baillard, Xavier, Brusch, Anders, Hugbart, Mathilde, Le Targat, Rodolphe, Lemonde, Pierre, Rovera, Giovanni D., Tcherbakoff, Olivier   +6 more
core   +4 more sources

Hyperpolarizability Effects in a Sr Optical Lattice Clock [PDF]

Physical Review Letters, 2006
We report the observation of the higher order frequency shift due to the trapping field in a $^{87}$Sr optical lattice clock. We show that at the magic wavelength of the lattice, where the first order term cancels, the higher order shift will not constitute a limitation to the fractional accuracy of the clock at a level of $10^{-18}$.
Brusch, Anders, Le Targat, Rodolphe, Baillard, Xavier, Fouché, Mathilde, Lemonde, Pierre   +4 more
openaire   +5 more sources

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source

Development of a strontium optical lattice clock for the SOC mission on the ISS [PDF]

, 2016
The ESA mission "Space Optical Clock" project aims at operating an optical lattice clock on the ISS in approximately 2023. The scientific goals of the mission are to perform tests of fundamental physics, to enable space-assisted relativistic geodesy and ...
, , A. Kulosa, B. Venon, Ch. Lisdat, D. Holleville, D. Świerad, E.-M. Rasel, G. Barwood, I. R. Hill, J. Hughes, J. Lodewyck, J. Stuhler, K. Bongs, L. Smith, M. S. Pramod, P. Gill, R. Le Targat, S. Bize, S. Origlia, S. Schiller, S. Viswam, S. Vogt, U. Sterr, W. Ertmer, W. He, W. Kaenders, Y. Ovchinnikov, Y. Singh   +28 more
core   +4 more sources

Ytterbium optical lattice clock at INRIM [PDF]

2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum, 2015
We present an optical lattice clock based on ytterbium 171Yb atoms developed in the laboratories of INRIM. In the experiment, we cool and trap ytterbium atoms in a two stage magneto-optical trap (MOT) (at 399nm and 556nm for the first and second stage, respectively).
PIZZOCARO, MARCO, BREGOLIN, FILIPPO, MILANI, GIANMARIA, RAUF, BENJAMIN, THOUMANY, PIERRE, COSTANZO, Giovanni Antonio, LEVI, FILIPPO, CALONICO, DAVIDE   +7 more
openaire   +2 more sources

Elinvar Materials: Recent Progress and Challenges

Advanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

A transportable optical lattice clock

Journal of Physics: Conference Series, 2016
We present the experimental setup and first results of PTB's transportable 87Sr clock. It consists of a physics package, several compact laser breadboards, and a transportable high finesse cavity for the clock laser. A comparison of the transportable system with our stationary optical lattice clock yields an instability of 2.2 x 10-15 √s/τ for the ...
Stefan Vogt, Sebastian Häfner, Jacopo Grotti, Silvio Koller, Ali Al-Masoudi, Uwe Sterr, Christian Lisdat   +6 more
openaire   +1 more source