Details are given of low inductance capacitors, and capacitor banks with energy storages in the range 1 to 10 kJ capable of giving maximum currents of 1.2 MA and rates of rise of 6 × 10¹² A/S. The working voltage in the work described is 10 kV, but the techniques have been used at higher voltages, up to 40 kV. An outline of the measurement techniques, used in the study of linear pinched discharges in low-pressure deuterium with these banks, is given.