@article {2012, title = {High Voltage Stability Measurements}, journal = {Electrotechnics \& Electronics}, volume = {47}, year = {2012}, pages = {75-78}, publisher = {The Union of Electronics, Electrical Engineering and Telecommunications}, chapter = {75}, address = {Sofia, Bulgaria}, abstract = {Stability of the accelerating voltage is essential for the correct operation of electron-optical devices. Any periodic and/or random changes in the high-voltage alters the energy of the electrons; thus, affecting their trajectories and resulting in a blurred beam spot. This paper deals with the design of a precise voltage divider for accurate high-voltage measurements (up to 120 kilovolts). A resistive divider enables voltage measurements in the sub-hertz band. An additional capacitance divider allows for the quantification of both the AC ripple and noise voltages in the 25 Hz to 100 kHz band. }, keywords = {high voltage, measurement, stability}, issn = {0861-4717}, author = {Martin Zoba{\v c} and Ivan Vl{\v c}ek and Stanislav {\v S}idlo and Ivo Ungerman} }