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Plasma lens fine focusing of heavy-ion beams

  • E. Boggasch
  • , A. Tauschwitz
  • , H. Wahl
  • , K. G. Dietrich
  • , D. H.H. Hoffmann
  • , W. Laux
  • , M. Stetter
  • , R. Tkotz
  • Max Planck Institute of Quantum Optics
  • GSI Helmholtz Centre for Heavy Ion Research
  • Friedrich-Alexander University Erlangen-Nürnberg

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

The fine-focusing capability of a current-carrying, "active" plasma lens has been demonstracted for the first time. A cylindrically symmetric argon discharge plasma pulsed with an oscillating current of over 20 kA in amplitude served as a current conducting medium. With this plasma lens has been demonstrated for the first time. A cylindrically symmetric argon discharge plasma pulsed with an oscillating current of over 20 kA in amplitude served as a current conducting medium. With this plasma lens the diameter of an incident 2.2-GeV gold ion beam from the linear accelerator UNILAC at GSI-Darmstadt was focused from initially 10 to about 0.25 mm, at a focal length of only 140 mm. The gradient of the azimuthal magnetic field exceeded 120 T/m. The striking features of this first-order and strong-focusing plasma lens favor its use as a precise high-gradient focusing device for high-energy charged particles.

Original languageEnglish
Pages (from-to)2475-2477
Number of pages3
JournalApplied Physics Letters
Volume60
Issue number20
DOIs
StatePublished - 1992
Externally publishedYes

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