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Laser ablation of calcium and aluminium atoms as a particle source for ion trap
Grim, Jakub ; Pekař, Zdeněk ; Pham, Minh Tuan ; Číp, Ondřej
Laser ablation is an effective method for generating particles from a variety of materials, including those with high evaporation temperatures such as aluminum. The use of high-energy laser pulses enables controlled evaporation of the material and the creation of an ablation crater. Successful results have been obtained in a pilot setup for the generation of neutral calcium and aluminium atoms by laser ablation. The method is being compared with thermal resistance oven in order to optimize the prosec generation of these particles. Subsequent spectroscopic measurements on the generated atoms are performed to optimize the absorption and emission of photons for subsequent ionization in the ion trap. A study of the transitions of neutral Ca and Al atoms shows that laser ablation provides a more efficient generation of atoms with the possibility of greater control over the process.
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Design of a modular miniaturized apparatus for ion trapping
Jedlička, Petr ; Pham, Minh Tuan ; Grim, Jakub ; Čížek, Martin ; Čepil, Adam ; Slodička, L. ; Číp, Ondřej
We are developing a new experimental apparatus for laser cooling of trapped ions, focusing on high electric field homogeneity, modularity and small size. The apparatus allows measurements with Coulomb crystals and easy modification for different experiments. The high homogeneity trap is created by electrospinning, while the modularity allows for the exchange of key parts. By miniaturizing the dimensions, we achieve a larger numerical aperture of the lens and a reduction in the size of the magnetic shielding. This portable apparatus offers new possibilities for ion studies and is promising for applications in satellite systems and reconnaissance satellites.
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Frequency references and dissemination
Hrabina, Jan ; Pravdová, Lenka ; Šarbort, Martin ; Čížek, Martin ; Holá, Miroslava ; Oulehla, Jindřich ; Pokorný, Pavel ; Lazar, Josef ; Číp, Ondřej
The work deals with an overview of research topics of the “Frequency references and dissemination” group, Department of Coherence Optics, Institute of Scientific Instruments, Czech Academy of Sciences. These topics include frequency locking of lasers by laser spectroscopy and high-finnese optical cavities, digital holography and optical frequency tranfers through fiber and free-space optical links.
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System of frequency standards at the ISI
Čížek, Martin ; Hrabina, Jan ; Pravdová, Lenka ; Číp, Ondřej
The contribution presents a system of frequency standards developed at the Institute of Scientific Instruments of the Czech Academy of Sciences. It discusses the need for highly coherent optical frequency references for demanding experiments in spectroscopy with cooled atoms. The system comprises interconnected standards operating in the radiofrequency and optical parts of the electromagnetic spectrum, including an active hydrogen maser, a fiber laser locked to a high-finesse optical resonator, and an optical frequency comb. The relative frequency stability of these standards is analyzed, highlighting their suitability for different integration times and applications. The article also describes the experimental setup for comparing the stability of the frequency standards at the Institute of Scientific Instruments with those at the BEV laboratory in Vienna using a stabilized phase-coherent optical fiber link. The results demonstrate the excellent stability of the frequency standards reaching the -15th order of magnitude, essential for spectroscopy and ion trapping experiments.
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The Coherence of Light Emitted by a Linear Coulomb Crystal and Its Mirror Image
Čepil, Adam ; Lešundák, Adam ; Pham, Minh Tuan ; Čížek, Martin ; Grim, Jakub ; Slodička, L. ; Číp, Ondřej
In our work, we focus on the experimental demonstration of two complementary approaches to enhancing the interaction between photons and atoms at the level of individual photons and 40Ca+ ions. We implement a scheme in which the observation of light interference scattered by several trapped atomic ions is further enhanced due to interference with their mirror images. The control of the corresponding collective coherent optical scattering and the possibility of observing the interaction with light emitted by many independent ions modified by optical boundary conditions promises a feasible approach to the effective realization of the interaction between light and matter or to the controlled observation of quantum electrodynamics phenomena with many atoms.
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