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

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

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Publication Article, peer reviewed scientific
Title First storage of ion beams in the Double Electrostatic Ion-Ring Experiment: DESIREE
Author(s) Schmidt, H.T. ; Thomas, R.D. ; Gatchell, M. ; Rosen, S. ; Reinhed, P. ; Löfgren, P ; Brännholm, L ; Blom, M ; Björkhage, M ; Bäckström, E ; Alexander, J D ; Leontein, S ; Hanstorp, D ; Zettergren, H ; Liljeby, L ; Källberg, A ; Simonsson, A ; Hellberg, F ; Mannervik, S ; Larsson, M ; Geppert, W D ; Rensfelt, K G ; Danered, H ; Paál, A ; Masuda, M ; Halldén, P ; Andler, G ; Stockett, M H ; Chen, T ; Källersjö, G ; Weimer, J ; Hansen, K ; Hartman, Henrik ; Cederquist, H
Date 2013
English abstract
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 (Cn-, 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 C2- 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.
DOI http://dx.doi.org/10.1063/1.4807702 (link to publisher's fulltext)
Publisher American Institute of Physics
Host/Issue Review of Scientific Instruments;5
Volume 84
ISSN 0034-6748
Pages 055115 (6 p)
Language eng (iso)
Subject(s) ion accelerators
ion beams
particle beam injection
space charge
storage rings
Beam characteristics
Storage rings and colliders
Beam injection and extraction
Technology
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/15929 (link to this page)

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