The laser ion source and trap (LIST) – A highly selective ion source

Schwellnus, F.; Blaum, Klaus; Geppert, Christopher; Gottwald, Tina; Kluge, H.‐J.; Mattolat, C.; Nörtershäuser, W.; Wies, K.; Wendt, Κ.

doi:10.1016/j.nimb.2008.05.065

Cited by 14 publications

(8 citation statements)

References 2 publications

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“…Fig. 2 contrast to earlier LIST designs as set up during the development phase [23], the on-line compatible LIST design had to be significantly simplified and the number of components and potentials applied was reduced to an absolute minimum. The unit nowadays comprises two circular electrodes, which act as a repeller at the entrance and as a well-defined end electrode at the exit, both with an outer diameter of 38 mm and a central bore of diameter of 7 mm (11 mm).…”

Section: The Laser Ion Source and Trapmentioning

confidence: 99%

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On-line implementation and first operation of the Laser Ion Source and Trap at ISOLDE/CERN

Fink

Richter

Blaum

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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At radioactive ion beam facilities like ISOLDE at CERN, a high purity of the element of interest in the ion beam is essential for most experiments on exotic nuclei. Due to its unique combination of high ionization efficiency and ultimate elemental selectivity, the Resonance Ionization Laser Ion Source, RILIS, has become the most frequently used ion source at ISOLDE and at the majority of similar facilities worldwide. However, isobaric contamination predominantly stemming from unspecific surface ionization may still introduce severe limitations. By applying the highly selective resonance ionization technique inside a radio-frequency quadrupole ion guide structure, the novel approach of the Laser Ion Source and Trap, LIST, suppresses surface ionized isobaric contaminants by an electrostatic repelling potential. Following extensive feasibility studies and off-line tests, the LIST device has been adapted and refined to match the stringent operational constraints and to survive the hostile environment of the ISOLDE front-end region enclosing the highly radioactive nuclear reaction target. The LIST operation was successfully demonstrated for the first time on-line at ISOLDE during two experiments, attesting its suitability for radioactive isotope production under routine conditions. Data of these on-line characterization measurements confirm a suppression of surface-ionized isobars by more than a factor of 1000 in accordance to off-line studies that were carried out for the preparation of the on-line experiments. During the first on-line test, the suppression was associated with an efficiency loss of not more than a factor of about 50 with respect to normal RILIS operation. These losses could be further reduced to only about 20 during the second run. Results of the off-line studies in comparison to the first on-line characterization data are discussed here

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Section: The Laser Ion Source and Trapmentioning

confidence: 99%

“…This is the principle of the Laser Ion Source and Trap (LIST), which has been developed by Mainz University in close collaboration with ISOLDE/CERN and the Max Planck-Institute for Nuclear Physics (MPIK) at Heidelberg [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

On-line implementation and first operation of the Laser Ion Source and Trap at ISOLDE/CERN

Fink

Richter

Blaum

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…Another solution called laser ion source trap (LIST), a combination of a laser ion source with an ion trap, was proposed by Blaum et al [89] quite some time ago. In the meantime development work at Jyväskylä [90], Louvain-La-Neuve [91], Mainz [83,92], and TRIUMF [76] was performed. A breakthrough was achieved by the Leuven group as mentioned above by the experiments on Cu isotopes at the LISOL facility in Louvain-La-Neuve [44], where a combination of an IGISOL gas cell and a linear sextupole radiofrequency trap was shown to suppress the isobaric background very effectively.…”

Section: Trends and Future Directionsmentioning

confidence: 99%

Atomic physics techniques for studying nuclear ground state properties, fundamental interactions and symmetries: status and perspectives

Kluge

2010

Hyperfine Interact

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The international workshop on "Application of Lasers and Storage Devices in Atomic Nuclei Research" held during 2009 in Poznan gave an excellent overview on the latest experimental and theoretical results regarding the investigation of radionuclides by atomic physics techniques and the extraction of ground state properties of exotic nuclei. This publication intends to summarize the progress recently achieved by laser spectroscopy and mass spectrometry as well as by weak interaction studies using atomic physics techniques. Furthermore, it tries to point to some areas requiring urgent improvements and to indicate some routes of future research and challenging opportunities.

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“…These studies led to different consecutive upgrades of its design towards reliable and successful on-line use [24]. The LIST performance was characterized during offline studies at the RISIKO off-line mass separator at University of Mainz on stable isotopes of Ga in respect to ionization efficiency, time structure of ion bunches, surface ion suppression (selectivity), emittance and maximum trap loading capacity.…”

Section: Off-line Performance Characterization Of the Listmentioning

confidence: 99%

The selective and efficient laser ion source and trap project LIST for on-line production of exotic nuclides

et al. 2010

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Laser ion sources based on resonant excitation and ionization of atoms are well-established tools for selective and efficient production of radioactive ion beams. A recent trend is the complementary installation of reliable state-of-theart all solid-state Ti:Sapphire laser systems. To date, 35 elements of the Periodic Table are available at laser ion sources by using these novel laser systems, which complements the overall accessibility to 54 elements including use of traditional dye lasers. Recent progress in the field concerns the identification of suitable optical excitation schemes for Ti:Sapphire laser excitation as well as technical developments of the source in respect to geometry, cavity material as well as by incorporation of an ion guide system in the form of the laser ion source trap LIST.

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The laser ion source and trap (LIST) – A highly selective ion source

Cited by 14 publications

References 2 publications

On-line implementation and first operation of the Laser Ion Source and Trap at ISOLDE/CERN

On-line implementation and first operation of the Laser Ion Source and Trap at ISOLDE/CERN

Atomic physics techniques for studying nuclear ground state properties, fundamental interactions and symmetries: status and perspectives

The selective and efficient laser ion source and trap project LIST for on-line production of exotic nuclides

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