Optimization of ECR singly-charged ion sources for the radioactive ion beam production

Jardin, P.; Farabolini, Wilfrid; Gaubert, G.; Pacquet, J. Y.; Drobert, T.; Cornell, J.C.; Barué, C.; Canet, Carles; Dupuis, Marc; Flambard, J. L.; Lecesne, N.; Lehérissier, P.; Lemagnen, F.; Leroy, R.

doi:10.1016/s0168-583x(02)01980-8

Cited by 8 publications

(6 citation statements)

References 3 publications

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“…The electron density can be roughly deduced from the volume P V of the plasma 14 and from ion λ using the relation (7). In the case of single ionization of Ar, in the conditions given in paragraph VII,…”

Section: Vib Electronic and Atomic Densitiesmentioning

confidence: 99%

“…In a previous paper (ref. 7), measurements of the time T ai versus the volume of the source chamber were presented. The MINIMONO volume was modified by connecting different additional volumes to the source, using large apertures between them.…”

Section: Vic Transformation Time Versus the Source Chamber Volumementioning

confidence: 99%

“…We now propose to fit these results with an expression deduced from the model. From equations (2), (7) and (13), we obtain: . (15) Up to now, we considered that the atoms of the pulse fill up the volume instantaneously, leading to a uniform atomic density just after the pulse injection.…”

Section: Vic Transformation Time Versus the Source Chamber Volumementioning

confidence: 99%

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Atom-to-ion transformation time in singly charged ECRISs

Jardin

Farabolini

Gaubert

et al. 2004

Nuclear Instruments and Methods in Physics Research Section B:

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We report a series of measurements performed to characterize the atom-to-ion transformationtime in singly-charged Electron Cyclotron Resonance Ion Sources (ECRISs). Three ECRISswere used with He, Ne, Ar and Kr noble gases. The transformation time as a function of thesupport gas flow, the ionization efficiency, and source volume is presented and compared toa calculation made with a simple dynamic model

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Section: Vib Electronic and Atomic Densitiesmentioning

confidence: 99%

Section: Vic Transformation Time Versus the Source Chamber Volumementioning

confidence: 99%

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Atom-to-ion transformation time in singly charged ECRISs

Jardin

Farabolini

Gaubert

et al. 2004

Nuclear Instruments and Methods in Physics Research Section B:

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“…This equally requires high temperatures. Radio-frequency heated plasma ion sources have been proposed [20][21][22] which, however, suffer from instabilities in pulsed primary beam operation [23] and an electron energy distribution that often favors breakup of the molecule over ionization [13,24].…”

Section: Introductionmentioning

confidence: 99%

A cold electron-impact ion source driven by a photo-cathode – New opportunities for the delivery of radioactive molecular beams?

Ballof

Barbero

et al. 2022

J. Phys.: Conf. Ser.

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The thick-target ISOL (Isotope mass Separation OnLine) method provides beams of more than 1000 radionuclides of 74 elements. The method is well established for elements with sufficiently high volatility at ca. 2000 °C. To extract non-volatile elements the formation of a volatile molecule is required. While successful in some cases (e.g. carbon or boron), most of these elements are not yet available as ISOL beam. A variety of volatile carrier molecules has been proposed for all elements produced in the target material, but their probability of survival during the extraction and ionization process is often limited by the high temperatures required for isotope diffusion in the thick targets and for ion source operation. While cold target concepts have already been proposed, the normal mode of operation of the typically used Versatile Arc Discharge Ion Source (VADIS) with a hot cathode is not well suited. Here, we report about first measurements with an electron-impact ion source operated at ambient temperature using electrons that were liberated via the photo-electric effect from a copper cathode.

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“…For these tasks, it is reasonable to use compact sources with small ionization chamber volume. The reduction of chamber volume is important for production of short-lived isotope [2]. The volume of plasma chamber can be reduced if the chamber will be based on a coaxial resonator loaded on a capacitor.…”

Section: Introductionmentioning

confidence: 99%

Current status of the compact 2.45 GHz ECR Ion Source at FLNR JINR

et al. 2019

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This paper describes recent results obtained with a compact 2.45 GHz ECR Ion Source at the ECR ion sources test bench. The source was tested for production of helium and hydrogen ions with different configurations of Ultra High Frequency (UHF) coupler, UHF power and frequency. At the extraction voltage about of 10 kV and UHF power about of 100 W more than 500 µA of He + ions were produced with the extraction hole of 3 mm in diameter that corresponds to the current density of 7.5mA/cm2. The future possible upgrades of the ion source are also discussed.

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Optimization of ECR singly-charged ion sources for the radioactive ion beam production

Cited by 8 publications

References 3 publications

Atom-to-ion transformation time in singly charged ECRISs

Atom-to-ion transformation time in singly charged ECRISs

A cold electron-impact ion source driven by a photo-cathode – New opportunities for the delivery of radioactive molecular beams?

Current status of the compact 2.45 GHz ECR Ion Source at FLNR JINR

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