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A linear radiofrequency quadrupole ion trap for the cooling and bunching of radioactive ion beams

  • A. Kellerbauer
  • , G. Bollen
  • , J. Dilling
  • , S. Henry
  • , F. Herfurth
  • , H. J. Kluge
  • , E. Lamour
  • , R. B. Moore
  • , C. Scheidenberger
  • , S. Schwarz
  • , G. Sikler
  • , J. Szerypo

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A linear radio-frequency quadrupole ion guide and beam buncher has been installed at the ISOLTRAP mass spectrometry experiment at he ISOLDE facility at CERN. The apparatus is being used as a beam cooling, accumulation, and bunching system. It operates with a buffer gas that cools the injected ions and converts the quasicontinuous 60-keV beam from the ISOLDE facility to 2.5-keV beam pulses with improved normalized transverse emittance. Recent measurements suggest a capture efficiency of the ion guide of up to 40% and a cooling and bunching efficiency of at least 12% which is expected to still be increased. The improved ISOLTRAP setup has so far been very successfully in three on-line experiments.

Original languageEnglish
Pages (from-to)565-569
Number of pages5
JournalNuclear Physics A
Volume701
Issue number1-4
DOIs
StatePublished - Apr 22 2002
Externally publishedYes

Funding

This work was financially supported by the European Commission within the EXO-TRAPS RTD project under contract ERBFMGECT980099 as well as by the Natural Sciences and Engineering Research Council of Canada (NSERC).

Keywords

  • Atomic masses
  • Buffer gas cooling
  • Ion guide
  • Ion trap
  • Mass spectrometry
  • Radioactive ions beams

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