Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Weyers, Stefan"'
Publikováno v:
Appl. Opt. 62, 7628-7632 (2023)
For the optical generation of ultrastable microwave signals for fountain clocks we developed a setup, which is based on a cavity stabilized laser and a commercial frequency comb. The robust system, in operation since 2020, is locked to a 100 MHz outp
Externí odkaz:
http://arxiv.org/abs/2308.08880
Publikováno v:
IEEE Trans. Ultrason. Ferroelectr. Freq. Control 64, 761 (2017)
We describe an optical frequency stabilization scheme of a microwave oscillator that is used for the interrogation of primary caesium fountain clocks. Because of its superior phase noise properties, this scheme, which is based on an ultrastable laser
Externí odkaz:
http://arxiv.org/abs/1609.05718
Publikováno v:
Phys. Rev. A 93, 043423 (2016)
We present experimental work for improved atom loading in the optical molasses of a caesium fountain clock, employing a low-velocity intense source of atoms (LVIS) [Lu et al., Phys. Rev. Lett. 77, 3331 (1996)], which we modified by adding a "dark" st
Externí odkaz:
http://arxiv.org/abs/1601.04852
Akademický článek
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Autor:
Falke, Stephan, Lemke, Nathan, Grebing, Christian, Lipphardt, Burghard, Weyers, Stefan, Gerginov, Vladislav, Huntemann, Nils, Hagemann, Christian, Al-Masoudi, Ali, Häfner, Sebastian, Vogt, Stefan, Sterr, Uwe, Lisdat, Christian
Publikováno v:
New J. Phys. 16, 073023 (2014)
We have measured the absolute frequency of the optical lattice clock based on $^{87}$Sr at PTB with an uncertainty of $3.9\times 10^{-16}$ using two caesium fountain clocks. This is close to the accuracy of today's best realizations of the SI second.
Externí odkaz:
http://arxiv.org/abs/1312.3419
We describe a new method to determine the position of the atomic cloud during its interaction with the microwave field in the cavity of a fountain clock. The positional information is extracted from the spectrum of the F=3,mF=0 to F=4,mF=-1 hyperfine
Externí odkaz:
http://arxiv.org/abs/1202.3067
We have measured the frequency of the $6s^2S_{1/2} - 5d^2D_{3/2}$ electric-quadrupole transition of $^{171}$Yb$^+$ with a relative uncertainty of $1\times 10^{-14}$, $\nu_{Yb}$ = 688 358 979 309 312 Hz $\pm$ 6 Hz. A femtosecond frequency comb generat
Externí odkaz:
http://arxiv.org/abs/physics/0103040
Autor:
Weyers, Stefan
Publikováno v:
Vierteljahrsschrift für Wissenschaftliche Pädagogik; 2023, Vol. 99 Issue 4, p462-480, 19p
Autor:
Weyers, Stefan
Publikováno v:
Neue Kriminalpolitik, 2003 Jan 01. 15(3), 106-109.
Externí odkaz:
https://www.jstor.org/stable/43262603
Autor:
Weyers, Stefan
Publikováno v:
Journal for Human Rights / Zeitschrift für Menschenrechte; 2022, Vol. 16 Issue 1, p28-48, 21p