Electron stimulated desorption process from ionic compound surface

Rakhovskaya, O.V.; Elovikov, S. S.; Dubinina, E.M.; Shakhurin, E.S.; Dementjev, A.P.

doi:10.1016/0039-6028(92)90113-k

Cited by 24 publications

(6 citation statements)

References 31 publications

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“…22 In particular, Al 2 O 3 reduction to aluminum in a metallic state under electron irradiation is a well-known phenomenon and was already observed. 23,24 This phenomenon is expected to be enhanced at low incident electron energies. Referring to the literature, 25 electroninduced nitrogen desorption from BN was only expected and observed at higher temperatures (typically 900 K-1100 K).…”

Section: Resultsmentioning

confidence: 99%

Electron-emission yield under electron impact of ceramics used as channel materials in Hall-effect thrusters

Tondu¹,

Belhaj²,

Inguimbert³

2011

Journal of Applied Physics

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We report measurement of electron-emission yield (EEY) under the impact of electrons on materials of Hall-effect-thruster (HET) interest: BN, BN-SiO 2 , and Al 2 O 3 . The effects of the material aging (under electron irradiation) on the yield of BN and Al 2 O 3 are investigated. The EEY of BN grows with electron exposure, whereas that of Al 2 O 3 reduces. A simple analysis of our experimental results indicates that these variations are most likely because of surface and near surface composition changes caused by the electron beam. The representativeness of EEY measurements on ceramics that have not suffered from the specific environment of a HET (ion and electron bombardment) is discussed.

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Section: Resultsmentioning

confidence: 99%

Electron-emission yield under electron impact of ceramics used as channel materials in Hall-effect thrusters

Tondu¹,

Belhaj²,

Inguimbert³

2011

Journal of Applied Physics

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“…1 demonstrate these processes: Within the first 20 h of the radiation, the adsorbated CO species convert readily to carbide in the oxygen-depleted spot. 27 Al clusters inlaying in the surface bend FIG. With re-spect to the oxide peak at 51 eV in the Al͑LVV͒ spectrum, the peak developing at 55 eV can be assigned to aluminum carbide ͑Fig.…”

Section: Discussionmentioning

confidence: 99%

Oxygen environmental Auger electron spectroscopy: Eliminating the electron beam effects on Al2O3 during Auger analysis

Guo

Maus‐Friedrichs

Kempter

et al. 2003

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Articles you may be interested inIon and electron bombardment-related ion emission during the analysis of diamond using secondary ion mass spectrometry Nanometer fabrication using selective thermal desorption of SiO 2 induced by focused electron beams and electron beam interference fringesThe charging phenomena and charge compensation under electron beam irradiation have been studied on alumina using Auger electron spectroscopy ͑AES͒. Electron-beam effects, observed in AES as oxygen depletion, contamination from residual gas, and charge-up, can be efficiently reduced in an oxygen environment of р5ϫ10 Ϫ8 Torr O 2 . The oxygen environmental Auger electron spectroscopy reveals an inherent relation between the oxygen depletion and the charge-up of alumina: Oxygen depletion due to electron-stimulated desorption, preceding the other electron-beam effects, is the primary cause of the charge-up of alumina. The charging phenomena of alumina and the efficiency of the O 2 environment for charge compensation can be interpreted in terms of the general energy band schema.

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“…This may indicate the formation of additional emission centers associated with the formation of oxygen vacancies and their complexes in a thin near-surface sample layer. Indeed, despite the fact that aluminum oxide has a high radiation resistance, that allows it to be used in many areas of radiation physics, in particular in dosimetry, there are experimental data that under the action of low-energy electron bombardment (1−3 keV ) the surface of Al 2 O 3 oxide can be destroyed due to electronstimulated desorption of oxygen [21]. To explain the destruction mechanism of Al 2 O 3 , the Knotek−Feibelman [22] model developed for oxides with the maximum degree of valency was used.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence of sapphire irradiated by low-energy electrons and ions

E.Yu.

K.E.

A.A.

et al. 2022

Optics and Spectroscopy

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Photoluminescence (PL) of sapphire single crystals as received and preirradiated by low energy Ar+ ions and electrons has been studied to reveal a relationship between sapphire charging under electron beam irradiation and radiation-induced defect formation. The photoluminescence spectra were obtained using a confocal microscope excitation wavelength of 445 nm as well as by a nonconfocal method with excitation at a wavelength of 355 nm. The lines observed in PL spectra for all samples are associated with both intrinsic and impurity defects. It has been established that preliminary ion irradiation leads to disordering of the near-surface region of the sample resulting in a significant increase in the photoluminescence intensity. Preliminary electron irradiation can lead to a change in the charge state of defects that initially exist in the crystal. Keywords: radiation-stimulated defects, sapphire photoluminescence, ion and electron irradiation.

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Electron stimulated desorption process from ionic compound surface

Cited by 24 publications

References 31 publications

Electron-emission yield under electron impact of ceramics used as channel materials in Hall-effect thrusters

Electron-emission yield under electron impact of ceramics used as channel materials in Hall-effect thrusters

Oxygen environmental Auger electron spectroscopy: Eliminating the electron beam effects on Al2O3 during Auger analysis

Photoluminescence of sapphire irradiated by low-energy electrons and ions

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