Quadrupole Paul Ion Trap in Complex for Optical Spectroscopy of Multiply Charged Thorium Ions for the Development of a Nuclear Frequency Standard

Troyan, V. I.; Borisyuk, P. V.; Vasil’ev, O. S.; Krasavin, А. V.; Poteshin, S. S.; Сысоев, А. А.; Chernyshev, D.M.; Donchenko, S. I.; Pal’chikov, V. G.

doi:10.1007/s11018-014-0535-8

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…15 In order to prevent short circuit in the ion trap electronics while working with very dense laser plasma, several changes were made comparing with our previous works. 16 To reduce plasma density at the entrance of the trap, a 0.5-mm diameter diaphragm was installed. Next to the diaphragm, an electrical potential 50 V was applied in order to destroy plasma.…”

Section: Methodsmentioning

confidence: 99%

Loading of mass spectrometry ion trap with Th ions by laser ablation for nuclear frequency standard application

Borisyuk

Derevyashkin

Khabarova

et al. 2017

Eur J Mass Spectrom (Chichester)

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We describe an original multisectional quadrupole ion trap aimed to realize nuclear frequency standard based on the unique isomer transition in thorium nucleus. It is shown that the system effectively operates on Th, Th and Th ions produced by laser ablation of metallic thorium-232 target. Laser intensity used for ablation is about 6 GW/cm. Via applying a bias potential to every control voltage including the RF one, we are able not only to manipulate ions within the energy range as wide as 1-500 eV but to specially adjust trap potentials in order to work mainly with ions that belong to energy distribution maximum and therefore to effectively enhance the number of trapped ions. Measurement of energy distributions of Th, Th, Th ions obtained by laser ablation allows us to define optimal potential values for trapping process. Observed number of ions inside trap in dependence on trapping time is found to obey an unusually slow - logarithmic decay law that needs more careful study.

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Section: Methodsmentioning

confidence: 99%

Loading of mass spectrometry ion trap with Th ions by laser ablation for nuclear frequency standard application

Borisyuk

Derevyashkin

Khabarova

et al. 2017

Eur J Mass Spectrom (Chichester)

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“…Alternative approaches that have been investigated are inductively coupled plasma techniques [379], electron-beam evaporation [380,383] and the extraction of ions from a 233 U source [266,397,399]. The production of thorium ions by laser ablation has the advantages that it is simple and does not require a helium buffer-gas environment.…”

Section: Generation Of 229 Th 3+ Ionsmentioning

confidence: 99%

“…Paul trapping of 229 Th ions has been achieved at PTB [132,221,344,422] at the Georgia Institute of Technology [57,58,278,279] and at LMU [321,398]. Several further experiments have reported preparatory trapping of 232 Th ions, which has the advantage of a lower radioactivity [37,38,41,109,264,341,380,382,383]. Importantly, thorium is a very reactive element.…”

Section: Paul Trapping Of 229 Th Ionsmentioning

confidence: 99%

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The $$^{229}$$Th isomer: prospects for a nuclear optical clock

Wense

2020

Eur. Phys. J. A

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The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency uncertainty of about $$10^{-19}$$ 10 - 19 has rendered a nuclear clock an interesting tool for many applications, potentially even for a re-definition of the second. The focus of the corresponding research is a nuclear transition of the $$^{229}$$ 229 Th nucleus, which possesses a uniquely low nuclear excitation energy of only $$8.12\pm 0.11$$ 8.12 ± 0.11 eV ($$152.7\pm 2.1$$ 152.7 ± 2.1 nm). This energy is sufficiently low to allow for nuclear laser spectroscopy, an inherent requirement for a nuclear clock. Recently, some significant progress toward the development of a nuclear frequency standard has been made and by today there is no doubt that a nuclear clock will become reality, most likely not even in the too far future. Here we present a comprehensive review of the current status of nuclear clock development with the objective of providing a rather complete list of literature related to the topic, which could serve as a reference for future investigations.

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“…Figure 7 demonstrates the typical mass spectra for gold and thorium obtained with electron-beam evaporation and ionization of pure gold and thorium nitride. 34…”

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confidence: 99%

Multisectional Linear Ion Trap and Novel Loading Method for Optical Spectroscopy of Electron and Nuclear Transitions

Сысоев

Troyan

Borisyuk

et al. 2015

Eur J Mass Spectrom (Chichester)

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There is a growing need for the development of atomic and nuclear frequency standards because of the important contribution of methods for precision time and frequency measurements to the development of fundamental science, technology and the economy. It is also conditioned by their potential use in optical clocks and quantum logic applications. It is especially important to develop a universal method that could allow one to use ions of most elements effectively (including ones that are not easily evaporated) proposed for the above-mentioned applications. A linear quadrupole ion trap for the optical spectroscopy of electron and nuclear transitions has been developed and evaluated experimentally. An ion source construction is based on an ultra-high vacuum evaporator in which a metal sample is subjected to an electron beam of energy up to 1 keV, resulting in the appearance of gaseous atoms and ions of various charge state.The linear ion trap consists of five successive quadrupole sections including an entrance quadrupole section, quadrupole mass filter, quadrupole ion guide, ion-trap section and exit quadrupole section. The same radiofrequency but a different direct current voltage feeds the quadrupole sections. The instrument allows the mass-and energy-selected trapping of ions from ion beams of various intensities and their localization in the area of laser irradiation. The preliminary results presented show that the proposed instrument and methods allow one to produce effectively up to triply charged thorium ions as well as to trap ions for future spectroscopic study. The instrument is proposed for future use in optical clocks and quantum logic application development.

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Quadrupole Paul Ion Trap in Complex for Optical Spectroscopy of Multiply Charged Thorium Ions for the Development of a Nuclear Frequency Standard

Cited by 5 publications

References 6 publications

Loading of mass spectrometry ion trap with Th ions by laser ablation for nuclear frequency standard application

Loading of mass spectrometry ion trap with Th ions by laser ablation for nuclear frequency standard application

The $$^{229}$$Th isomer: prospects for a nuclear optical clock

Multisectional Linear Ion Trap and Novel Loading Method for Optical Spectroscopy of Electron and Nuclear Transitions

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