Abstract

A high-precision high-voltage divider with a range of 85 kV was designed for electron beam energy measurements, particularly in the Shanghai electron beam ion trap (Zhu et al 2005 Nucl. Instrum. Methods Phys. Res. B 235 509). After minimizing the uncertainties caused by temperature fluctuations, including the effect of temperature on the resistance of the resistors, the divider was calibrated from 0 to 63 kV with a precision of less than 10 parts per million (ppm). During the calibration a parallel connection method was used to simplify the measurement.

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