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- W2058035336 abstract "An electron impact ion source using a solid charge was interfaced with A/D and D/A units which are connected to a microprocessor control unit. A PID (proportional, integral, and derivative) control algorithm was implemented to control the ion source. The power fed to the ion source filament and furnace filament are controlled so as to keep both the discharge voltage and current constant. With this controlled ion source, the result shows a steady ion current. For example, with Pb+ ions, an initial ion current of 13 μA stayed within ±1.5 μA for 60 min; with no control, the ion current fell steadily and had to be manually reset three times every 20 min over a 60-min run. Similar results have been obtained with Mg+, Al+, Zn+, and Sn+ ions." @default.
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- W2058035336 date "1986-03-01" @default.
- W2058035336 modified "2023-10-18" @default.
- W2058035336 title "Microprocessor‐controlled electron impact ion source operated at constant discharge current and voltage" @default.
- W2058035336 cites W1979207330 @default.
- W2058035336 doi "https://doi.org/10.1063/1.1138939" @default.
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