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Separation of atomic and molecular ions by ion mobility with an RF carpet

Publiceringsår

2021

Upphovspersoner

Miskun, Ivan; Dickel, Timo; San Andrés, Samuel Ayet; Bergmann, Julian; Constantin, Paul; Ebert Jens; Geissel, Hans; Greiner, Florian; Haettner, Emma; Hornung, Christine; Lippert, Wayne; Mardor, Israel; Moore, Iain; Plaß, Wolfgang R.; Purushothaman, Sivaji; Rink, Ann-Kathrin; Reiter, Moritz P.; Scheidenberger, Christoph; Weick, Helmut
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Abstrakt

Gas-filled stopping cells are used at accelerator laboratories for the thermalization of high-energy radioactive ion beams. Common challenges of many stopping cells are a high molecular background of extracted ions and limitations of extraction efficiency due to space-charge effects. At the FRS Ion Catcher at GSI, a new technique for removal of ionized molecules prior to their extraction out of the stopping cell has been developed. This technique utilizes the RF carpet for the separation of atomic ions from molecular contaminant ions through their difference in ion mobility. Results from the successful implementation and test during an experiment with a 600 MeV/u 124 Xe primary beam are presented. Suppression of molecular contaminants by three orders of magnitude has been demonstrated. Essentially background-free measurement conditions with less than 1% of background events within a mass-to-charge range of 25 u/e have been achieved. The technique can also be used to reduce the space-charge effects at the extraction nozzle and in the downstream beamline, thus ensuring high efficiency of ion transport and highly-accurate measurements under space-charge-free conditions.
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Organisationer och upphovspersoner

Publikationstyp

Publikationsform

Artikel

Moderpublikationens typ

Tidning

Artikelstyp

En originalartikel

Målgrupp

Vetenskaplig

Kollegialt utvärderad

Kollegialt utvärderad

UKM:s publikationstyp

A1 Originalartikel i en vetenskaplig tidskrift

Publikationskanalens uppgifter

Förläggare

Elsevier BV

Volym

459

Artikelnummer

116450

Publikationsforum

58604

Publikationsforumsnivå

1

Öppen tillgång

Öppen tillgänglighet i förläggarens tjänst

Ja

Öppen tillgång till publikationskanalen

Delvis öppen publikationskanal

Parallellsparad

Ja

Övriga uppgifter

Vetenskapsområden

Fysik

Nyckelord

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Publiceringsland

Nederländerna

Förlagets internationalitet

Internationell

Språk

engelska

Internationell sampublikation

Ja

Sampublikation med ett företag

Nej

DOI

10.1016/j.ijms.2020.116450

Publikationen ingår i undervisnings- och kulturministeriets datainsamling

Ja