Design of a novel electrostatic ion storage ring at KACST

Abdellahi, Majid; Alshammari, Suliman; Welsch, Carsten; Alharbi, H. H.

doi:10.1016/j.nima.2013.01.026

Cited by 25 publications

(14 citation statements)

References 36 publications

(42 reference statements)

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“…9 Furthermore, a new electrostatic ring is being built at King Abdulaziz City for Science and Technology in Riyadh. 10 In parallel with the development of the larger electrostatic storage rings there has been a development of much smaller and compact devices in the form of electrostatic ionbeam traps (EIBTs). In these traps, the ions are moving with keV kinetic energies between two focusing electrostatic mirrors.…”

Section: Introductionmentioning

confidence: 99%

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

Schmidt

Thomas

Gatchell

et al. 2013

Review of Scientific Instruments

123

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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. © 2013 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

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

Schmidt

Thomas

Gatchell

et al. 2013

Review of Scientific Instruments

123

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“…Electrostatic quadrupoles are used for beam modulation. The respective dimensions of all ion optical elements are comparable to the ones at ELISA [28].…”

Section: An Electrostatic Storage Ring At Kacstmentioning

confidence: 71%

Low Energy Storage Rings: Opening Routes for Beyond State-of-the-art Research

Welsch¹

2011

AIP Conference Proceedings

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Electrostatic storage rings have proven to be invaluable tools for atomic and molecular physics at the ultra-low energy range from 1 to 100 keV/A. Due to the mass independence of the electrostatic rigidity these machines are able to store a wide range of different particles, from light ions to heavy singly charged bio-molecules. Their beam dynamics is, however, fundamentally different to magnetic storage rings and therefore needs to be investigated in detail to optimize storage ring performance and experimental output. This paper first gives an overview of existing electrostatic storage rings and their experimental programs. Second, future machines in Heidelberg, Stockholm and the Facility for Antiproton and Ion Research (FAIR) are described and the main challenges are summarized. Finally, the focus is set on a flexible storage ring facility presently being built up at the King Abdulaziz Center for Science and Technology (KACST) in Riyadh, Saudi Arabia, that addresses a broad user community and will allow for a next-generation experimental program in the low energy regime.

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“…9,15 Additional electrostatic storage rings and a) E-mail: afrl.rvborgmailbox@kirtland.af.mil traps are currently being developed. 11,[16][17][18][19][20][21] In particular, the Double Electrostatic Storage Ion Ring in Stockholm 16,22 will hopefully provide benchmark MN measurements over a wide range of energies for comparison with the flowing afterglow measurements described here.…”

Section: Introductionmentioning

confidence: 97%

Dissociative recombination and mutual neutralization of heavier molecular ions: C10H8+, WF5+, and CnFm+

Wiens

Shuman

Viggiano

2015

The Journal of Chemical Physics

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Dissociative recombination (DR) rate coefficients for the naphthalene cation, C10H8(+), and WF5(+), and mutual neutralization (MN) rate coefficients for these species and five CnFm(+) ions, were determined at 300 K using variable electron and neutral density attachment mass spectrometry (VENDAMS). DR proceeds at 9 ± 3 × 10(-7) cm(3) s(-1) for C10H8(+) and at 6.1 ± 1.4 × 10(-7) cm(3) s(-1) for WF5(+). Consistent with previous results, MN for the polyatomic cations with the halide anions Cl(-), Br(-), and I(-) exhibits an approximate μ(-1/2) reduced mass dependence of the reactant partners, demonstrating that ion collision velocities influence the rate coefficients. This work is an extension of VENDAMS to systems, where low reactant concentrations are necessary to avoid significant reaction of product ions with the neutral precursor, i.e., conditions not suitable for traditional flowing afterglow measurements, as well as to ions of masses > ∼ 100 Da, which are not amenable to the study of DR in magnetic storage rings. Our results expand the sparse literature on DR and MN of heavier ions.

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Design of a novel electrostatic ion storage ring at KACST

Cited by 25 publications

References 36 publications

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

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

Low Energy Storage Rings: Opening Routes for Beyond State-of-the-art Research

Dissociative recombination and mutual neutralization of heavier molecular ions: C10H8+, WF5+, and CnFm+

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