Numerical simulation of a trochoidal electron monochromator

Matúška, J; Kubala, D.; Matejčík, Štefan

doi:10.1088/0957-0233/20/1/015901

Cited by 11 publications

(4 citation statements)

References 22 publications

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“…In addition to experiments using the Ar synchrotron radiation source described above, experiments have also been performed using a TEM, 15 the principle of operation of which has most recently been reviewed in ref. 16. Very briefly, energy selection operates through the electron energy dependence of the physical displacement of an electron beam, generated from a filament, in a crossed E-B field.…”

Section: Use Of a Trochoidal Electron Monochromator (Tem)mentioning

confidence: 99%

A new form of spontaneously polarized material

Plekan

Cassidy

Balog

et al. 2011

Phys. Chem. Chem. Phys.

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We report here the discovery of a new form of spontaneously polarized material. Examples of this material, in the form of films, demonstrate the property that they spontaneously harbour electric fields which may exceed 10(8) Vm(-1), achieving potentials of tens of volts on the film surface. The molecules presently identified form a diverse group, thus far of six species, with gas phase dipoles lying between 0.08 D and 0.5 D: propane (0.08 D), isopentane (0.13 D), nitrous oxide (0.167 D), isoprene (0.25 D), toluene (0.385 D) and CF(3)Cl (Freon-13; 0.5 D). Here we concentrate on an understanding of the nature of the interactions which give rise to the spontaneously polarized state, using the measured temperature dependence of the electric field in N(2)O as a diagnostic. We show that the polarized state can arise through a mechanism of non-linear dipole alignment in a single domain in which dipole alignment generates the electric field within the film and the field generates dipole alignment. Non-local interactions take place over the dimension of the thickness of the film and permeate the entire medium through the agency of the electric field. This new type of material may have wide ranging applications in devices and in nanotechnology.

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Section: Use Of a Trochoidal Electron Monochromator (Tem)mentioning

confidence: 99%

A new form of spontaneously polarized material

Plekan

Cassidy

Balog

et al. 2011

Phys. Chem. Chem. Phys.

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“…A simple scheme of the device is shown in the figure 1. The electron beam was generated by trochoidal electron monochromator with heated tungsten filament used as electron source [18]. The energetic resolution of the electron beam was approximately 300 meV and the electron current measured by the faraday cup was 900 nA and was within 5% of this value in the range from 4 eV up to 100 eV.…”

Section: Methodsmentioning

confidence: 99%

Electron Induced Emission of Nitrous Oxide in the UV-VIS Spectral Range

Országh

Danko

Matejčík

2020

PPT

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The electron impact excitation of N2O was studied using the crossed electron-molecular beams method. Optical emission spectrum initiated by 50 eV electron impact was recorded within the range 200-700 nm. Main emission bands arise from excited ion state N2O+(A2Σ) and dissociative excitation into N2+(B2Σ+u). The rotationally un-resolved excitation-emission cross sections for selected ion transitions were scaled to absolute values and their dependence on electron energy was determined. Several of them were determined for the first time.

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“…A resistively heated tungsten hairpin filament was used as a source of electrons. The electron beam was formed by a trochoidal electron monochromator [21]. Electrons were energetically selected in a dispersion region by their applied perpendicular electric field (0-10 V) and axial magnetic field (5 × 10 −3 T).…”

Section: Methodsmentioning

confidence: 99%

Electron induced fluorescence of the H₂molecule—Balmer lines and Fulcherαsystem

Danko

Ribar

Ďurian

et al. 2016

Plasma Sources Sci. Technol.

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We report results of an experimental study focused on the fluorescence of H 2 initiated by the impact of quasimonochromatic electrons. The emission spectra of H 2 molecules at electron energies of 25 eV, 50 eV and 100 eV have been measured in the spectral range of 320-670 nm. The emission spectrum is dominated by Balmer emission lines, Fulcher α, β, γ and δ bands and different singlet transitions of H 2 . In addition to the atomic lines and molecular bands, the presence ofu continuum radiation is present in the whole studied range. We have determined the emission cross sections (ECS) for particular processes leading to the emission of the Balmer (n = 3, 4, 5, 6, 7, 8 → 2) lines and for selected bands of the Fulcher α system of H 2 (d 3 Π u → a 3 Σ + g ) as a function of electron energy in the range 5-100 eV. Emission cross sections for the Balmer lines (n = 6, 7, 8 → 2) and Fulcher α (1, 0), (1, 1), (2, 2), (3, 3) bands were measured for the first time.

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Numerical simulation of a trochoidal electron monochromator

Cited by 11 publications

References 22 publications

A new form of spontaneously polarized material

A new form of spontaneously polarized material

Electron Induced Emission of Nitrous Oxide in the UV-VIS Spectral Range

Electron induced fluorescence of the H₂molecule—Balmer lines and Fulcherαsystem

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Numerical simulation of a trochoidal electron monochromator

Cited by 11 publications

References 22 publications

A new form of spontaneously polarized material

A new form of spontaneously polarized material

Electron Induced Emission of Nitrous Oxide in the UV-VIS Spectral Range

Electron induced fluorescence of the H2molecule—Balmer lines and Fulcherαsystem

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Electron induced fluorescence of the H₂molecule—Balmer lines and Fulcherαsystem