Electrostatic ion trap and Fourier transform measurements for high-resolution mass spectrometry

Bhushan, K. G.; Gadkari, S. C.; Yakhmi, J. V.; Sahni, V. C.

doi:10.1063/1.2777195

Cited by 24 publications

(18 citation statements)

References 13 publications

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“…The use of electrostatic potentials in our instrument enables large molecules such as DNA to be trapped, whose stability under exposure to various types of radiation could be studied. It can also be used as a highresolution mass spectrometer by detecting the image charge of ion bunches using a pick-up ring, since the oscillation frequency is inversely proportional to the square root of the mass , Bhushan et al 2007.…”

Section: Discussionmentioning

confidence: 99%

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Alexander

Calvert

King

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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An electrostatic trapping scheme for use in the study of light-induced dissociation of molecular ions is outlined. We present a detailed description of the electrostatic reflection storage device and specifically demonstrate its use in the preparation of a vibrationally cold ensemble of deuterium hydride (HD + ) ions. By interacting an intense femtosecond laser with this target and detecting neutral fragmentation products, we are able to elucidate previously inaccessible dissociation dynamics for fundamental diatomics in intense laser fields. In this context, we present new results of intense field dissociation of HD + which are interpreted in terms of recent theoretical calculations.

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Section: Discussionmentioning

confidence: 99%

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Alexander

Calvert

King

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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“…With appropriate choices of γ and c, CHIMERA could also be easily applied to other electrostatic traps and rings for which ion bunches are injected from an external source. For instance, ion bunches from a matrix-assisted laser desorption and ionization source 19 and a pulsed beam 20 have previously been injected into this type of trap using electrostatic optics. Another possible implementation would be for the case where ions are confined and cooled in a radiofrequency trap prior to injection into a storage ring, provided the ions are injected directly rather than being mass selected by a magnet.…”

Section: Discussionmentioning

confidence: 99%

A comb-sampling method for enhanced mass analysis in linear electrostatic ion traps

Greenwood

Kelly

Calvert

et al. 2011

Review of Scientific Instruments

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In this paper an algorithm for extracting spectral information from signals containing a series of narrow periodic impulses is presented. Such signals can typically be acquired by pickup detectors from the image-charge of ion bunches oscillating in a linear electrostatic ion trap, where frequency analysis provides a scheme for high-resolution mass spectrometry. To provide an improved technique for such frequency analysis, we introduce the CHIMERA algorithm (Comb-sampling for High-resolution IMpulse-train frequency ExtRAaction). This algorithm utilizes a comb function to generate frequency coefficients, rather than using sinusoids via a Fourier transform, since the comb provides a superior match to the data. This new technique is developed theoretically, applied to synthetic data, and then used to perform high resolution mass spectrometry on real data from an ion trap. If the ions are generated at a localized point in time and space, and the data is simultaneously acquired with multiple pickup rings, the method is shown to be a significant improvement on Fourier analysis. The mass spectra generated typically have an order of magnitude higher resolution compared with that obtained from fundamental Fourier frequencies, and are absent of large contributions from harmonic frequency components.

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“…The Laplacian can be replaced by the left-hand side of Eq. (8). The boundary conditions for the two-species plasma are identical to those for the singlespecies plasma computations presented in Sec.…”

Section: Two-species Plasmamentioning

confidence: 96%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, electrostatic confinement of a non-drifting non-neutral singlespecies plasma is impossible, if such confinement requires using electrodes to produce a three-dimensional electrostatic potential well in vacuum. A three-dimensional electrostatic potential well can be produced by the space charge of a second species of particles of opposite charge sign.…”

Section: Introductionmentioning

confidence: 99%

Space-charge-based electrostatic plasma confinement involving relaxed plasma species

2012

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A numerical study is reported on the equilibrium properties of a surface-emitted or edge-confined non-drifting plasma. A self-consistent finite-differences evaluation of the electrostatic potential is carried out for a non-neutral plasma that follows a Boltzmann density distribution. The non-neutral plasma generates an electrostatic potential that has an extremum at the geometric center. Poisson's equation is solved for different ratios of the non-neutral plasma size to the edge Debye length. The profiles of the electrostatic potential and the plasma density are presented for different values of that ratio. A second plasma species is then introduced for two-plasma-species confinement studies, with one species confined by the space charge of the other, while each species follows a Boltzmann density distribution. An equilibrium in which a neutral region forms is found. An equilibrium is also found in which the two species have equal temperatures and charge states. V C 2012 American Institute of Physics. [http://dx.

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Electrostatic ion trap and Fourier transform measurements for high-resolution mass spectrometry

Cited by 24 publications

References 13 publications

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

A comb-sampling method for enhanced mass analysis in linear electrostatic ion traps

Space-charge-based electrostatic plasma confinement involving relaxed plasma species

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