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Journal of Radioanalytical and Nuclear Chemistry

, Volume 305, Issue 3, pp 837–842 | Cite as

Electron stripping of Bi ions using a modified 1.4 MeV/u gas stripper with pulsed gas injection

  • Paul Scharrer
  • Egon Jäger
  • Winfried Barth
  • Mario Bevcic
  • Christoph E. Düllmann
  • Lars Groening
  • Klaus-Peter Horn
  • Jadambaa Khuyagbaatar
  • Jörg Krier
  • Alexander Yakushev
Article

Abstract

The GSI UNILAC will serve as an injector system for the future Facility for Antiproton and Ion Research (FAIR) facility. To meet the high demands for high-intensity heavy-ion beams, an upgrade of the existing 1.4 MeV/u gas stripper is envisaged with the aim of increasing the stripping efficiency for the required charge state. For this, an increase of the stripping gas density is pursued. Since FAIR will use pulsed beams with a very small duty cycle, a new stripper setup with a pulsed gas injection was implemented to minimize the gas load and thereby enables an increase of the gas pressure. The setup was tested using a bismuth ion beam with a nitrogen gas target. The performance is compared with that of the existing nitrogen gas-jet stripper. The charge stripping of bismuth ions into the same average charge state (26+) was achieved.

Keywords

Gas stripper Heavy ion Gas target 

Notes

Acknowledgments

The authors are grateful for the support of the GSI ion-source and UNILAC staff. Stimulating discussions on theoretical interpretation of the present results with V. P. Shevelko are greatly acknowledged. This work was financially supported by the Helmholtz Institut Mainz and the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany.

References

  1. 1.
    Barth W et al (2007) Upgrade program of the high current heavy ion UNILAC as an injector for FAIR. Nucl Instrum Methods Phys Res A 577:211–214CrossRefGoogle Scholar
  2. 2.
    FAIR (2006) Baseline Technical Report, Vol. 2, GSI Darmstadt, p 335Google Scholar
  3. 3.
    Ratzinger U (1996) The New GSI Prestripper Linac for High Current Heavy Ion Beams. In: Proceedings of LINAC1996, 26th–30th August, Geneva, Switzerland, pp 288–292Google Scholar
  4. 4.
    Barth W, Forck P (2000) The new gas stripper and charge state separator of the GSI high current injector. In: Proceedings of LINAC2000, 21th–25th August, Monterey, USA, pp 235–237Google Scholar
  5. 5.
    Betz H (1972) Charge states and charge-changing cross sections of fast heavy ions penetrating through gaseous and solid media. Rev Mod Phys 44:465–539CrossRefGoogle Scholar
  6. 6.
    Schlitt B et al (2013) Charge stripping tests of high current uranium ion beams with methane and hydrogen gas strippers and carbon foils at the GSI UNILAC. In: Proceedings of IPAC2013, 13th–17th May, Shanghai, China, pp 3779–3781Google Scholar
  7. 7.
    Riehl G et al (1990) A multifunctional profile and emittance measurement system. In: Proceedings of EPAC1990, 12th–16th June, Nice, France, pp 756–758Google Scholar
  8. 8.
    Barth W et al (2004) Development of the UNILAC towards a megawatt beam injector. In: Proceedings of LINAC2004, 16th–20th August, Lübeck, Germany, pp 246–250Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Paul Scharrer
    • 1
    • 2
  • Egon Jäger
    • 2
  • Winfried Barth
    • 1
    • 2
  • Mario Bevcic
    • 2
  • Christoph E. Düllmann
    • 1
    • 2
    • 3
  • Lars Groening
    • 2
  • Klaus-Peter Horn
    • 2
  • Jadambaa Khuyagbaatar
    • 1
  • Jörg Krier
    • 2
  • Alexander Yakushev
    • 2
  1. 1.Helmholtz Institut MainzJohannes Gutenberg-Universität MainzMainzGermany
  2. 2.GSI Helmholtzzentrum für Schwerionenforschung GmbHDarmstadtGermany
  3. 3.Johannes Gutenberg-Universität MainzMainzGermany

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