Results 221 to 230 of about 3,503 (278)

Exploring nonlinear dynamics in periodically driven time crystal from synchronization to chaotic motion. [PDF]

Nat Commun
Greilich A, Kopteva NE, Korenev VL, Haude PA, Bayer M.   +4 more
europepmc   +1 more source

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, EarlyView.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244Cm$$ {}^{244}\mathrm{Cm} $$ sources, and come with severe concerns on radiation safety and ...
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Multielemental Analysis in Rice Grains by Total Reflection X‐Ray Fluorescence

X-Ray Spectrometry, EarlyView.
ABSTRACT Rice (Oryza sativa) is a staple food cultivated worldwide and represents a significant source of essential nutrients for humans. However, this cereal may also contain potentially toxic elements including chromium, arsenic, and lead typically present at trace concentrations (ng.g−1).
F. T. S. Tsuyama, R. G. Leitão, C. G. L. Canellas, G. C. Ferreira, J. L. Pereira, R. S. Santos, J. T. Assis, D. F. Oliveira, M. J. Anjos   +8 more
wiley   +1 more source

Rb4CuSb2X12 (X = Cl, Br) as Novel Vacancy‐Ordered Quadruple Perovskites

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The vacancy‐ordered quadruple perovskites Rb4CuSb2X12 (X = Cl, Br) were crystallized from hydrohalic acid. Their crystal structures can be interpreted as new distortion variants of the perovskite structure with ordered vacancies. The electronic structure of Rb4CuSb2Br12 shows that the Br and Sb states form the valence band and the upper conduction band.
Mirko Bravic, Markus Otteny, Kevin Eble, Julian Gebhardt, Christian Elsässer, Michael Daub   +5 more
wiley   +1 more source

Twin‐compartment solid–liquid cells for neutron reflectometry

Journal of Applied Crystallography, EarlyView.
We introduce a twin‐compartment solid–liquid cell for neutron reflectometry that divides a single substrate into two independent measurement areas, doubling sample capacity and enabling direct side‐by‐side comparisons. This sample environment also reduces alignment and sample preparation time and has been successfully tested on both vertical and ...
Nicoló Paracini, Hannah Burrall, Thomas Saerbeck, Philipp Gutfreund, Giovanna Fragneto, Luke A. Clifton, Thomas Arnold, Marité Cárdenas   +7 more
wiley   +1 more source

High-performance silicon photonic single-sideband modulators for cold-atom interferometry. [PDF]

Sci Adv
Kodigala A, Gehl M, Hoth GW, Lee J, DeRose CT, Pomerene A, Dallo C, Trotter D, Starbuck AL, Biedermann G, Schwindt PDD, Lentine AL.   +11 more
europepmc   +1 more source

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Digital lock-in amplifier for space rubidium atomic clock

Review of Scientific Instruments, 2021
In many low-noise applications, extracting information from the extremely noisy signal is required. This task can be accomplished by a lock-in amplifier if the frequency of the signal is known before detection. Error signal output from the physics package of the rubidium atomic clock (RbAC) is one of those noisy signals.
Pratik Jain, Priyanka Priya, T. V. S. Ram, K. S. Parikh, Thejesh N. Bandi   +4 more
openaire   +2 more sources

Rubidium atomic clock with drift compensation

CPEM 2010, 2010
This paper shows the results of an automatic system that compensates drifts of rubidium atomic clocks, comparing to GPS. This leads to high stability in large time and low noise in short time.
Leonardo Trigo, Daniel Slomovitz
openaire   +1 more source

All-Optical Integrated rubidium Atomic Clock

2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings, 2011
We report on progress in the development of an All-Optical Integrated Micro-Primary Atomic Clock (AO-IMPAC). The operattion of the clock is based on an inhomogeneously broadened rubidium optical transition used for stabilization of a Kerr optical frequency comb generated in a high-Q whispering gallery mode (WGM) microresonator. We have demonstrated the
L. Maleki, A. A. Savchenkov, V. S. Ilchenko, W. Liang, D. Eliyahu, A. B. Matsko, D. Seidel, N. P. Wells, J. C. Camparo, B. Jaduszliwer   +9 more
openaire   +1 more source

Atomic phase delay in a rubidium atomic clock

1993 IEEE International Frequency Control Symposium, 2002
The phase delay that exists between the oscillating atomic system and the probing microwave field in a rubidium atomic clock is examined. This phase delay must be accounted for in the feedback control circuitry of the clock in order to maximize the device's short-term stability.
J.C. Camparo, R.P. Frueholz
openaire   +1 more source