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Full-Text Articles in Physical Sciences and Mathematics
Using Ohm's Law To Calibrate A Picoammeter To 0.4 Pico-Ampere Precision, Joseph Hashem, Tiankuan Liu, Zhihua Liang, Jingbo Ye
Using Ohm's Law To Calibrate A Picoammeter To 0.4 Pico-Ampere Precision, Joseph Hashem, Tiankuan Liu, Zhihua Liang, Jingbo Ye
Journal of Undergraduate Research
We present an experimental method based on Ohm’s Law to calibrate the Keithley 6485 picoammeter with the calibration error less than 0.4 pico-ampere (pA), which is specified as the highest sensitivity of this instrument. The maximum calibration difference between the measurement current and the calibration current in the picoammeter’s 2 nano-ampere (nA) range is 0.25 pA. This difference is far less than the highest accuracy, 0.4 pA, specified by the instrument. Measurement errors are estimated and discussed.
The Effects Of Radiation And Low Temperatures On Optical Fibers, Nnadozie Tassie
The Effects Of Radiation And Low Temperatures On Optical Fibers, Nnadozie Tassie
Journal of Undergraduate Research
My research seeks to identify optical fibers capable of operating in an environment with radiation and low temperatures. This study is for an international detector R&D project which is for the high luminosity upgrade of the Large Hadron Collider (LHC) at CERN, Switzerland. In high energy particle physics experiments, silicon pixel detectors, often called inner trackers, are used to precisely measure the trajectories of charged particles. The Inner Trackers for both the ATLAS and the CMS, two of the four large experiments at the LHC, operate in high radiation environment and in an ambient temperature of -20 to -30°C to …