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

Schmidt, H. T.; Thomas, R. D.; Gatchell, M.; Rosen, S.; Reinhed, P.; Lofgren, P.; Brannholm, L.; Blom, M.; Bjorkhage, M. and Backstrom, E., et al. (2013) In Review of Scientific Instruments 84(5).
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 (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... (More)
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. (Less)
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Review of Scientific Instruments
volume
84
issue
5
publisher
AIP Publishing LLC
external identifiers
  • wos:000319999300073
  • scopus:84878927049
ISSN
1089-7623
DOI
10.1063/1.4807702
language
English
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yes
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c8116522-03e8-441a-98f1-2ddab2dd4a12 (old id 3930373)
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2013-07-16 13:16:33
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@article{c8116522-03e8-441a-98f1-2ddab2dd4a12,
  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 (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.},
  articleno    = {055115},
  author       = {Schmidt, H. T. and Thomas, R. D. and Gatchell, M. and Rosen, S. and Reinhed, P. and Lofgren, P. and Brannholm, L. and Blom, M. and Bjorkhage, M. and Backstrom, E. and Alexander, J. D. and Leontein, S. and Hanstorp, D. and Zettergren, H. and Liljeby, L. and Kallberg, A. and Simonsson, A. and Hellberg, F. and Mannervik, S. and Larsson, M. and Geppert, W. D. and Rensfelt, K. G. and Danared, Håkan and Paal, A. and Masuda, M. and Hallden, P. and Andler, G. and Stockett, M. H. and Chen, T. and Kallersjo, G. and Weimer, J. and Hansen, K. and Hartman, Henrik and Cederquist, H.},
  issn         = {1089-7623},
  language     = {eng},
  number       = {5},
  publisher    = {AIP Publishing LLC},
  series       = {Review of Scientific Instruments},
  title        = {First storage of ion beams in the Double Electrostatic Ion-Ring Experiment: DESIREE},
  url          = {http://dx.doi.org/10.1063/1.4807702},
  volume       = {84},
  year         = {2013},
}