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- W2035092412 abstract "In many experiments where it is necessary to measure small pressure changes in an isolated ultra-high vacuum chamber, the ion-pumping effect of a hot-cathode ionization gauge can introduce significant errors. A gauge control unit is described which automatically maintains the gauge filament within 10 °C of its operating temperature, whether the electron-accelerating grid voltage is present or not. Hence, the gauge can be operated in a pressure-measuring (pumping) mode or an ambient (non-pumping) mode without disturbing the thermal equilibrium of the gauge. Moreover, the gauge can be switched to a pressure-measuring mode for a short time, only long enough for a pressure print-out to be made. By appropriate choice of the pumping and non-pumping time intervals (which can be programmed into the control unit) the ion-pumping action of the gauge can be arranged to contribute negligibly to the pressure change being recorded." @default.
- W2035092412 created "2016-06-24" @default.
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- W2035092412 date "1976-01-01" @default.
- W2035092412 modified "2023-09-25" @default.
- W2035092412 title "Reducing the effect of ion pumping on very low pressure measurements by a hot-cathode ionization gauge" @default.
- W2035092412 cites W2017392726 @default.
- W2035092412 doi "https://doi.org/10.1016/s0042-207x(76)80415-0" @default.
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