INSTITUTO SABATO

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https://nuclea.cnea.gob.ar//handle/20.500.12553/771

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Examinando INSTITUTO SABATO por Autor "Abele, Manlio"

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  • Miniatura
    ÍtemAcceso Abierto
    Diseño y mediciones con una fuente de iones del tipo de arco colimado en campo magnético I
    (Comisión Nacional de Energía Atómica (CNEA), 1959) Abele, Manlio; Meckbach, Wolfgang
    An experimental ion source the hot-cathode are discharge type has been constructed. The are is colliraated in a magnetic field and the extraction of the ion beam is axial. Detailed measurements of the characteristics of this ion source have been efectuated. The maximun total ion curren obtained is 40 mA. There is evidence of secondary electrons whose falsificating effeets on the measured current had to be eliminated- Calorimetrical measurements of the target current are in agreement with the electrical ones. A convenient means of regulation or modulation of the beam current of the source is described.
  • Miniatura
    ÍtemAcceso Abierto
    Diseño y mediciones con una fuente de iones del tipo de arco colimado en campo magnético II
    (Comisión Nacional de Energía Atómica (CNEA), 1959) Abele, Manlio; Meckbach, W.G.R.F.J.
    The definite construction of the ion source is described-There have been made further investigations of the properties of the source improving specially the extracting and focussing of the ion beam, which allowed to measure practically 100 % of the extracted ions on the collectin electrode, even at the maximun current of 40 mA. It seems evident that the limiting factor on the maximun current is not due to the sourde itself, but rather due to space charge effects in the extracted beam, which latter tend to deteriórate the focussing and give rise to secondary emission. High energy secondary electrons which find the way back through the source, produce local heating of the filament and instabilities of the are current. A magnetic analysis of the ion beam shows a maximun percentage of protons of 30 % related to the total hydrogen—ion current. Humidity of the input hydrogen gives rise to a strong oxygen peak.