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Lego Figure holding a lego telescope. Photo

Henrik Hartman

Researcher (Leave of Absence)

Lego Figure holding a lego telescope. Photo

First storage of ion beams in the Double Electrostatic Ion-Ring Experiment: DESIREE

Author

  • H. T. Schmidt
  • R. D. Thomas
  • M. Gatchell
  • S. Rosen
  • P. Reinhed
  • P. Lofgren
  • L. Brannholm
  • M. Blom
  • M. Bjorkhage
  • E. Backstrom
  • J. D. Alexander
  • S. Leontein
  • D. Hanstorp
  • H. Zettergren
  • L. Liljeby
  • A. Kallberg
  • A. Simonsson
  • F. Hellberg
  • S. Mannervik
  • M. Larsson
  • W. D. Geppert
  • K. G. Rensfelt
  • Håkan Danared
  • A. Paal
  • M. Masuda
  • P. Hallden
  • G. Andler
  • M. H. Stockett
  • T. Chen
  • G. Kallersjo
  • J. Weimer
  • K. Hansen
  • Henrik Hartman
  • H. Cederquist
Show all

Summary, in English

We report on the first storage of ion beams in the Double ElectroStatic Ion Ring ExpEriment, DESIREE, at Stockholm University. We have produced beams of atomic carbon anions and small carbon anion molecules (C-n(-), n = 1, 2, 3, 4) in a sputter ion source. The ion beams were accelerated to 10 keV kinetic energy and stored in an electrostatic ion storage ring enclosed in a vacuum chamber at 13 K. For 10 keV C-2(-) molecular anions we measure the residual-gas limited beam storage lifetime to be 448 s +/- 18 s with two independent detector systems. Using the measured storage lifetimes we estimate that the residual gas pressure is in the 10(-14) mbar range. When high current ion beams are injected, the number of stored particles does not follow a single exponential decay law as would be expected for stored particles lost solely due to electron detachment in collision with the residual-gas. Instead, we observe a faster initial decay rate, which we ascribe to the effect of the space charge of the ion beam on the storage capacity. (C) 2013 AIP Publishing LLC.

Department/s

  • European Spallation Source ESS AB
  • Lund Observatory - Has been reorganised

Publishing year

2013

Language

English

Publication/Series

Review of Scientific Instruments

Volume

84

Issue

5

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Astronomy, Astrophysics and Cosmology
  • Physical Sciences
  • Natural Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1089-7623