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Utrobicic, A.; Kovacic, M.; Erhardt, F.; Poljak, N.; Planinic, M.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 11/2015, Letnik: 801Journal Article
This paper presents a concept of a multiple channel picoammeter suitable for operation at a high voltage. To ensure floating operation, 1kHz readout rate and low battery usage, the picoammeter employs an optical fibre for data transmission. The analogue conditioning section consists of a transimpedance amplifier that is connected to a 16 bit ΣΔ ADC which is integrated into the microcontroller. Simultaneous reception of data sent from multiple picoammeter units is achieved using an FPGA device and a USB interface to the host PC. A prototype with a ±125nA range was constructed. The paper includes a calibration procedure of the prototype and an example of a current leakage test conducted on a 10×10cm2 GEM foil. The resolution achieved by the prototype in a 15min test at 0.5nA bias was 6.5pA FWHM.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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