Matches in SemOpenAlex for { <https://semopenalex.org/work/W2029665302> ?p ?o ?g. }
Showing items 1 to 92 of
92
with 100 items per page.
- W2029665302 endingPage "792" @default.
- W2029665302 startingPage "788" @default.
- W2029665302 abstract "Three cesium ion guns covering the energy range of 5–5000 V are described. These guns use a novel source of cesium ions that combine the advantages of porous metal ionizers with those of aluminosilicate emitters. Cesium ions are chemically stored in a solid electrolyte pellet and are thermionically emitted from a porous thin film of tungsten at the surface. Cesium supply to the emitting surface is controlled by applying a bias across the pellet. A total charge of 10.0 C can be extracted, corresponding to greater than 2000 h of lifetime with an extraction current of 1.0 μA. This source is compact, stable, and easy to use, and produces a beam with >99.5% purity. It requires none of the differential pumping or associated hardware necessary in designs using cesium vapor and porous tungsten ionizers. It has been used in ultrahigh-vacuum (UHV) experiments at pressures of <10−10 Torr with no significant gas load. Three different types of extraction optics are used depending on the energy range desired. For low-energy deposition, a simple space-charge-limited planar diode with a perveance of 1×10−7 A/V3/2 is used. Current densities of 10.0 μA/cm2 at the exit aperture for energies ≤20 V are typical. This type of source provides an alternative to vapor deposition with the advantage of precise flux calibration by integration of the ion current. For energies from 50 to 500 V and typical beam radii of 0.5 to 0.2 mm, a high perveance Pierce-type ion gun is used. This gun was designed with a perveance of 1×10−9 A/V3/2 and produces a beam with an effective temperature of 0.35 eV. For the energy range of 0.5 to 5 keV, the Pierce gun is used in conjunction with two Einzel lenses, enabling a large range of imaging ratios to be obtained. Beam radii of 60 to 300 μm are typical for beam currents of 50 nA to 1.0 μA. Results are presented and discussed for UHV studies of ion implantation, electronic surface changes induced by adsorbates, and negative secondary-ion mass spectrometry." @default.
- W2029665302 created "2016-06-24" @default.
- W2029665302 creator A5008788829 @default.
- W2029665302 creator A5045098463 @default.
- W2029665302 creator A5064291347 @default.
- W2029665302 creator A5076800920 @default.
- W2029665302 date "1990-02-01" @default.
- W2029665302 modified "2023-10-17" @default.
- W2029665302 title "Solid state cesium ion guns for surface studies" @default.
- W2029665302 cites W1662421065 @default.
- W2029665302 cites W1979159797 @default.
- W2029665302 cites W1991893039 @default.
- W2029665302 cites W1992902652 @default.
- W2029665302 cites W2008237682 @default.
- W2029665302 cites W2019468890 @default.
- W2029665302 cites W2038183579 @default.
- W2029665302 cites W2040231298 @default.
- W2029665302 cites W2048612157 @default.
- W2029665302 cites W2066823098 @default.
- W2029665302 cites W2076228589 @default.
- W2029665302 cites W2092535244 @default.
- W2029665302 cites W2093877425 @default.
- W2029665302 cites W2096012282 @default.
- W2029665302 cites W2123285442 @default.
- W2029665302 doi "https://doi.org/10.1063/1.1141495" @default.
- W2029665302 hasPublicationYear "1990" @default.
- W2029665302 type Work @default.
- W2029665302 sameAs 2029665302 @default.
- W2029665302 citedByCount "9" @default.
- W2029665302 countsByYear W20296653022015 @default.
- W2029665302 crossrefType "journal-article" @default.
- W2029665302 hasAuthorship W2029665302A5008788829 @default.
- W2029665302 hasAuthorship W2029665302A5045098463 @default.
- W2029665302 hasAuthorship W2029665302A5064291347 @default.
- W2029665302 hasAuthorship W2029665302A5076800920 @default.
- W2029665302 hasConcept C103132145 @default.
- W2029665302 hasConcept C113196181 @default.
- W2029665302 hasConcept C121332964 @default.
- W2029665302 hasConcept C145148216 @default.
- W2029665302 hasConcept C147120987 @default.
- W2029665302 hasConcept C178790620 @default.
- W2029665302 hasConcept C180541544 @default.
- W2029665302 hasConcept C184779094 @default.
- W2029665302 hasConcept C185592680 @default.
- W2029665302 hasConcept C188224857 @default.
- W2029665302 hasConcept C191897082 @default.
- W2029665302 hasConcept C192562407 @default.
- W2029665302 hasConcept C2779848162 @default.
- W2029665302 hasConcept C43617362 @default.
- W2029665302 hasConcept C50774322 @default.
- W2029665302 hasConcept C519659679 @default.
- W2029665302 hasConcept C542268612 @default.
- W2029665302 hasConcept C62520636 @default.
- W2029665302 hasConceptScore W2029665302C103132145 @default.
- W2029665302 hasConceptScore W2029665302C113196181 @default.
- W2029665302 hasConceptScore W2029665302C121332964 @default.
- W2029665302 hasConceptScore W2029665302C145148216 @default.
- W2029665302 hasConceptScore W2029665302C147120987 @default.
- W2029665302 hasConceptScore W2029665302C178790620 @default.
- W2029665302 hasConceptScore W2029665302C180541544 @default.
- W2029665302 hasConceptScore W2029665302C184779094 @default.
- W2029665302 hasConceptScore W2029665302C185592680 @default.
- W2029665302 hasConceptScore W2029665302C188224857 @default.
- W2029665302 hasConceptScore W2029665302C191897082 @default.
- W2029665302 hasConceptScore W2029665302C192562407 @default.
- W2029665302 hasConceptScore W2029665302C2779848162 @default.
- W2029665302 hasConceptScore W2029665302C43617362 @default.
- W2029665302 hasConceptScore W2029665302C50774322 @default.
- W2029665302 hasConceptScore W2029665302C519659679 @default.
- W2029665302 hasConceptScore W2029665302C542268612 @default.
- W2029665302 hasConceptScore W2029665302C62520636 @default.
- W2029665302 hasIssue "2" @default.
- W2029665302 hasLocation W20296653021 @default.
- W2029665302 hasOpenAccess W2029665302 @default.
- W2029665302 hasPrimaryLocation W20296653021 @default.
- W2029665302 hasRelatedWork W1495609493 @default.
- W2029665302 hasRelatedWork W1965814298 @default.
- W2029665302 hasRelatedWork W1970225414 @default.
- W2029665302 hasRelatedWork W2016086650 @default.
- W2029665302 hasRelatedWork W2030920768 @default.
- W2029665302 hasRelatedWork W2063272586 @default.
- W2029665302 hasRelatedWork W2076041813 @default.
- W2029665302 hasRelatedWork W2081524458 @default.
- W2029665302 hasRelatedWork W2081802228 @default.
- W2029665302 hasRelatedWork W2124287529 @default.
- W2029665302 hasVolume "61" @default.
- W2029665302 isParatext "false" @default.
- W2029665302 isRetracted "false" @default.
- W2029665302 magId "2029665302" @default.
- W2029665302 workType "article" @default.