Simple and efficient photo-ionization loading of ions for precision ion-trapping experiments

Gulde, S.; Rotter, D.; Barton, P. A.; Schmidt‐Kaler, F.; Blatt, R.; Hogervorst, W.

doi:10.1007/s003400100749

Cited by 120 publications

(128 citation statements)

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“…Both effects make the precise and stable localization of the ion in the trap more tedious. These adverse effects can be strongly mitigated by using resonant laser photoionization of the neutral atom [3,4], allowing to eliminate the electron beam and to reduce the atomic flux because of the higher ionization cross section. This approach adds to the complexity of the setup, however, because one or even two lasers are required to excite resonance transitions of the neutral atom.…”

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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“…⋆ Fax: +34-93-553-4000, E-mail: carsten.schuck@icfo.es and 390nm [3,4]. The idea of the scheme, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The idea of the scheme, as shown in Fig. 1, is to excite the neutral calcium atoms in the thermal beam resonantly on the 4s 2 1 S 0 → 4s4p 1 P 1 transition and then further to high-lying Rydberg-states which are subsequently Stark-ionized in the electric field of the ion trap [3,5].…”

Section: Introductionmentioning

confidence: 99%

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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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“…Additional beneficial effects, like strongly reduced static charging of dielectrics [9], lower motional heating rates of the ions after loading due to the suppression of patch potentials [10] and easier loading of surface-electrode traps with a substantially reduced trap depth [11] is of great advantage in the laboratories. Loading of Paul traps by narrowband cw photoionization [12] has been achieved by several groups on a growing number of atomic species (Ba [13,14], Mg [15], Ca [9,16,17], Yb [18], Sr [19,20], In [21] etc.). Several of these schemes have been applied to photoionization loading techniques that substitute the resistively heated atomic oven as source of neutral atoms.…”

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confidence: 99%

Efficient photo-ionization for barium ion trapping using a dipole-allowed resonant two-photon transition

2012

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Two efficient and isotope-selective resonant two-photon ionization techniques for loading barium ions into radio-frequency (RF)-traps are demonstrated. The scheme of using the strong dipole-allowed transition 6s 2 1 S 0 → 6s6p 1 P 1 at λ = 553 nm as a first step towards ionization is compared to the established technique of using a weak intercombination line (6s 2 1 S 0 → 5d6p 3 D 1 , λ = 413 nm). An increase of two orders of magnitude in the ionization efficiency is found favoring the transition at 553 nm. This technique can be implemented using commercial all-solid-state laser systems and is expected to be advantageous compared to other narrowband photoionization schemes of barium in cases where highest efficiency and isotope-selectivity are required.

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Simple and efficient photo-ionization loading of ions for precision ion-trapping experiments

Cited by 120 publications

References 0 publications

Laser ablation loading of a radiofrequency ion trap

Laser ablation loading of a radiofrequency ion trap

Two-color photoionization of calcium using SHG and LED light

Efficient photo-ionization for barium ion trapping using a dipole-allowed resonant two-photon transition

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