Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Stappel, M."'
Publikováno v:
Phys. Rev. Lett. 115, 173001 (2015)
We demonstrate excitation of a single trapped cold $^{40}$Ca$^+$ ion to Rydberg levels by laser radiation in the vacuum-ultraviolet at 122 nm wavelength. Observed resonances are identified as 3d$^2$D$_{3/2}$ to 51 F, 52 F and 3d$^2$D$_{5/2}$ to 64F.
Externí odkaz:
http://arxiv.org/abs/1506.05958
A stable, continuous wave, single frequency fiber amplifier system at 1015 nm with 10W output power is presented. It is based on a large mode double clad fiber cooled to liquid nitrogen temperature. The amplified light is frequency quadrupled to 254
Externí odkaz:
http://arxiv.org/abs/1308.4800
Autor:
Feldker, T., Pelzer, L., Stappel, M., Bachor, P., Steinborn, R., Kolbe, D., Walz, J., Schmidt-Kaler, F.
We present studies of mixed Coulomb crystals of 40Ca+ and 40Ca2+ ions in a linear Paul trap. Doubly charged ions are produced by photoionisation of trapped 40Ca+ with a vacuum ultraviolet laser source and sympathetically cooled via Doppler cooled 40C
Externí odkaz:
http://arxiv.org/abs/1306.1109
We present a high power single-frequency ytterbium fiber amplifier system with an output power of 30 W at 1091 nm. The amplifier system consists of two stages, a preamplifier stage in which amplified spontaneous emission is efficiently suppressed (>4
Externí odkaz:
http://arxiv.org/abs/1206.5152
Autor:
Kolbe, D., Beczkowiak, A., Diehl, T., Koglbauer, A., Sattler, M., Stappel, M., Steinborn, R., Walz, J.
We demonstrate a reliable continuous-wave (cw) laser source at the 1\,$S$--2\,$P$ transition in (anti)hydrogen at 121.56\,nm (Lyman-$\alpha$) based on four-wave sum-frequency mixing in mercury. A two-photon resonance in the four-wave mixing scheme is
Externí odkaz:
http://arxiv.org/abs/1106.1050
Autor:
Kolbe, D., Beczkowiak, A., Diehl, T., Koglbauer, A., Müllers, A., Scheid, M., Stappel, M., Steinborn, R., Walz, J.
Publikováno v:
Canadian Journal of Physics, 2011, 89(1): 25-28
Cooling antihydrogen atoms is important for future experiments both to test the fundamental CPT symmetry by high-resolution laser spectroscopy and also to measure the gravitational acceleration of antimatter. Laser-cooling of antihydrogen can be done
Externí odkaz:
http://arxiv.org/abs/1009.5480
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Akademický článek
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