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- W2053307946 abstract "Abstract The quantum efficiencies of a channeltron and a magnetic electron multiplier have been determined for 0.5–5 keV H atoms and ions. The efficiency of the detectors for ions is obtained by comparing its ion pulse rate with the ion pulse rate of a Daly detector. To determine the efficiency for atoms we partly converted the H+ beam into an H0 beam using a gas-cell for charge transfer. With this partly neutralized beam we found the efficiency for neutrals in two different ways. Firstly we measured the dependence of the ratio of the atom to ion pulse rate on the pressure in the gas-cell. From its maximum we can determine the absolute detector efficiency. Secondly we can determine the efficiency directly from a measurement of the ratio at a single pressure using the known differential cross sections. The two results are in good agreement. The magnetic electron multiplier has a lower efficiency than the channeltron. The efficiency for atoms is considerably smaller than for ions in the energy region below 1 keV. For both detectors the efficiency decreases when the energy of the particles comes below 1.5 keV." @default.
- W2053307946 created "2016-06-24" @default.
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- W2053307946 date "1987-12-01" @default.
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- W2053307946 title "The quantum efficiency of a channeltron and a magnetic electron multiplier for 0.5–5 keV H atoms and ions" @default.
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- W2053307946 doi "https://doi.org/10.1016/0168-583x(87)90069-3" @default.
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