Ohm's Law Low-current Calibration System for Ionization Chambers
| Autor: | Ryan P. Fitzgerald, Shamith U. Payagala, Dean G. Jarrett, Jeffrey T. Cessna, Neil M. Zimmerman, Denis E. Bergeron, Charles J. Waduwarage Perera |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Ohm's law Physics::Instrumentation and Detectors Astrophysics::Instrumentation and Methods for Astrophysics Electrometer 01 natural sciences law.invention Computational physics 010309 optics symbols.namesake law Ionization 0103 physical sciences Ionization chamber Calibration symbols Voltage source Resistor 010306 general physics Multimeter |
| Zdroj: | 2020 Conference on Precision Electromagnetic Measurements (CPEM). |
| Popis: | We describe our progress toward a system to calibrate electrometers that measure currents from ionization chambers. The calibration system uses a $1\ \mathrm{G}\Omega$ standard resistor in series with a stable voltage source to generate calibration currents from 1 pA to 20 nA, traceable to quantum voltage and resistance standards through an 8-1/2 digit digital multimeter and the standard resistor. Expanded uncertainties ( $k=2$ ) of $100\times 10^{-6}$ or better for the calibration of the electrometer are needed for the ionization chamber measurements. We show our preliminary results including our initial calibration correction. |
| Databáze: | OpenAIRE |
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