An all-optical ion-loading technique for scalable microtrap architectures

Hendricks, Richard; Grant, David M.; Herskind, Peter F.; Dantan, Aurélien; Drewsen, Michael

doi:10.1007/s00340-007-2698-3

Cited by 40 publications

(41 citation statements)

References 25 publications

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“…We are especially interested in the production of Th + for an investigation of a nuclear optical clock based on the low energy transition to an isomeric state in 229 Th [7]. Previous studies have already reported laser ablation from metals for the loading of ion traps [5,[8][9][10][11][12][13], but typically higher laser pulse energies at infrared wavelengths were used and experiments were carried out only for a small selection of elements. Laser desorption of organic molecules has been studied in conjunction with ion trap mass spectrometry (see for example Refs.…”

Section: Introductionmentioning

confidence: 99%

Laser ablation loading of a radiofrequency ion trap

et al. 2012

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The production of ions via laser ablation for the loading of radiofrequency (RF) ion traps is investigated using a nitrogen laser with a maximum pulse energy of 0.17 mJ and a peak intensity of about 250 MW/cm 2 . A time-of-flight mass spectrometer is used to measure the ion yield and the distribution of the charge states. Singly charged ions of elements that are presently considered for the use in optical clocks or quantum logic applications could be produced from metallic samples at a rate of the order of magnitude 10 5 ions per pulse. A linear Paul trap was loaded with Th + ions produced by laser ablation. An overall ion production and trapping efficiency of 10 −7 to 10 −6 was attained. For ions injected individually, a dependence of the capture probability on the phase of the RF field has been predicted. In the experiment this was not observed, presumably because of collective effects within the ablation plume.

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Section: Introductionmentioning

confidence: 99%

Laser ablation loading of a radiofrequency ion trap

et al. 2012

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“…Knowledge of the 1 S 0 ↔ 1 P 1 transition line in atomic Yb and of the corresponding frequency shifts for the stable isotopes is very important in these experiments as it allows for laser cooling and isotope selective photoionisation [20,22,[25][26][27]. Various methods have been used to investigate these transitions and the corresponding isotope shifts [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Doppler-free Yb spectroscopy with the fluorescence spot technique

2010

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We demonstrate a simple technique to measure the resonant frequency of the 398.9-nm 1 S 0 ↔ 1 P 1 transition for the different Yb isotopes. The technique, which works by observing and aligning fluorescence spots, has enabled us to measure transition frequencies and isotope shifts with an accuracy of 60 MHz. We provide wavelength measurements for the transition that differ from previously published work. Our technique also allows for the determination of Doppler-shifted transition frequencies for photoionization experiments when the atomic beam and the laser beam are not perpendicular and furthermore allows us to determine the average velocity of the atoms along the direction of the atomic beam.

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“…see Fig. 1, which exhibit high efficiency and isotope selectivity but rely on complex and expensive laser systems [14,15,16,17,18,19,20]. Apart from these established schemes, an interesting possibility is using a low-cost, free running 405nm laser diode for the excitation close to the first ionization limit [21].…”

Section: Introductionmentioning

confidence: 99%

Two-color photoionization of calcium using SHG and LED light

et al. 2010

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We present a photoionization method to load single 40 Ca ions in a linear Paul trap from an atomic beam. Neutral Ca I atoms are resonantly excited from the ground state to the intermediate 4s4p 1 P 1 -level using coherent 423nm radiation produced by single-pass second harmonic generation in a periodically poled KTiOPO 4 crystal pumped with an 120mW extended cavity diode laser. Ionization is then attained with a high-power light emitting diode imaged to the trap center, using an appropriately designed optical system composed of standard achromatic doublet lenses. The setup simplifies previous implementations at similar efficiency, and it hardly requires any maintenance at all.

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An all-optical ion-loading technique for scalable microtrap architectures

Cited by 40 publications

References 25 publications

Laser ablation loading of a radiofrequency ion trap

Laser ablation loading of a radiofrequency ion trap

Doppler-free Yb spectroscopy with the fluorescence spot technique

Two-color photoionization of calcium using SHG and LED light

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