FIELD: measurements of surface density of total charge in flat dielectrics.
SUBSTANCE: method is based upon induction and measurement of alternating current in circuit of vibration capacitor, which has charged sample in its gap. Sample is placed into first position inside gap of capacitor in parallel to its plates. Sample is moved in direction of normal to its surface to get the second position. Currents of capacitor are measured for both positions of sample at zero voltage at capacitor. Current of capacitor is measured at one of positions of sample, for example, at first one, at known permanent voltage at capacitor; value of density of charge is calculated by means of formula. Adjustment and systematic measurement of voltage at capacitor is excluded.
EFFECT: simplified process of measurement.
1 dwg
