The ceramic transformer employed in the high voltage supply is manufactured by NEC Corporation [2].
It is a small, low-profile and highly efficient piezoelectric ceramic transformer.
The transformer is shaped symmetrically in the lengthwise direction and operated in the third order longitudinal vibration mode as shown in Fig. 1 Input and output electronic terminals are connected to electrodes positioned at nodes of the
vibration mode.
So the transformer is free from snapping of the wires connecting the terminals and the electrodes.